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Cetin B, Ozturk F, Keles M and Yurdakul S (2017), "PAHs and PCBs in an Eastern Mediterranean megacity, Istanbul: Their spatial and temporal distributions, air-soil exchange and toxicological effects", ENVIRONMENTAL POLLUTION. Vol. 220(B), pp. 1322-1332.
Abstract: Istanbul, one of the mega cities in the world located between Asia and
Europe, has suffered from severe air pollution problems due to rapid
population growth, traffic and industry. Atmospheric levels of PAHs and
PCBs were investigated in Istanbul at 22 sampling sites during four
different sampling periods using PUF disk passive air samplers and
spatial and temporal variations of these chemicals were determined. Soil
samples were also taken at the air sampling sites. At all sites, the
average ambient air Sigma(15)PAH and Sigma 41PCB concentrations were
found as 85.6 +/- 68.3 ng m(-3) and 246 +/- 122 pg m(-3), respectively.
Phenanthrene and anthracene were the predominant PAHs and low molecular
weight congeners dominated the PCBs. The PAH concentrations were higher
especially at urban sites close to highways. However, the PCBs showed
moderately uniform spatial variations. Except four sites, the PAH
concentrations were increased with decreasing temperatures during the
sampling period, indicating the contributions of combustion sources for
residential heating, while PCB concentrations were mostly increased with
the temperature, probably due to enhanced volatilization at higher
temperatures from their sources. The results of the Factor Analysis
represented the impact of traffic, petroleum, coal/biomass and natural
gas combustion and medical waste incineration plants on ambient air
concentrations. A similar spatial distribution trend was observed in the
soil samples. Fugacity ratio results indicated that the source/sink
tendency of soil for PAHs and PCBs depends on their volatility and
temperature; soil generally acts as a source for lighter PAHs and PCBs
particularly in higher temperatures while atmospheric deposition is a
main source for higher molecular weight compounds in local soils.
Toxicological effect studies also revealed the severity of air and soil
pollution especially in terms of PAHs in Istanbul. (C) 2016 Elsevier
Ltd. All rights reserved.
BibTeX:
@article{ISI:000390732300060,
  author = {Cetin, Banu and Ozturk, Fatma and Keles, Melek and Yurdakul, Sema},
  title = {PAHs and PCBs in an Eastern Mediterranean megacity, Istanbul: Their spatial and temporal distributions, air-soil exchange and toxicological effects},
  journal = {ENVIRONMENTAL POLLUTION},
  year = {2017},
  volume = {220},
  number = {B},
  pages = {1322--1332},
  doi = {10.1016/j.envpol.2016.11.002}
}
Deveci EU, Dizge N, Yatmaz HC and Aytepe Y (2016), "Integrated process of fungal membrane bioreactor and photocatalytic membrane reactor for the treatment of industrial textile wastewater", BIOCHEMICAL ENGINEERING JOURNAL. Vol. 105(B), pp. 420-427.
Abstract: In this study, fungal membrane bioreactor (FMBR) and semiconductor
photocatalytic membrane reactor (PMR) were used in order to test the
efficiency of integrated fungal biodegradation and photocatalytic
degradation of textile wastewater from reactive washing processes. It
was found that color removal and chemical oxygen demand (COD) reduction
efficiencies were 88% and 53% for photocatalytic degradation,
respectively. TiO2 and ZnO were tested as semiconductor catalysts in the
PMR and TiO2 showed better efficiencies than ZnO for both color and COD
removal. However, it was attained that color removal and COD reduction
efficiencies were about 56% and 60% for fungal biodegradation using
Phatterochaete chrysosporium, respectively. Moreover, integrated system
in which photocatalytic degradation was employed as a post-treatment
application after fungal biodegradation process achieved high removal
efficiencies for color and COD removal as 93% and 99%, respectively.
(C) 2015 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000367776500012,
  author = {Deveci, Ece Ummu and Dizge, Nadir and Yatmaz, H Cengiz and Aytepe, Yasin},
  title = {Integrated process of fungal membrane bioreactor and photocatalytic membrane reactor for the treatment of industrial textile wastewater},
  journal = {BIOCHEMICAL ENGINEERING JOURNAL},
  year = {2016},
  volume = {105},
  number = {B},
  pages = {420--427},
  doi = {10.1016/j.bej.2015.10.016}
}
Inan H, Turkay O and Akkiris C (2016), "Microwave and microwave-chemical pretreatment application for agricultural waste", DESALINATION AND WATER TREATMENT. Vol. 57(6, SI), pp. 2590-2596.
Abstract: This study aimed to investigate the effect of microwave (MW) and
microwave-chemical (MWC) pretreatment on barley straw and to identify
the acidic, basic, or oxidative chemicals that provide the highest sugar
conversion for subsequent enzymatic hydrolysis. The MW and MWC processes
were applied as a pretreatment step before fermentation. MW radiation at
200 and 300W and MW radiation plus a chemical (H2SO4 or NaOH or H2O2) as
catalyst were applied, and total sugar, total phenol, and Klason and
acid-soluble lignin were measured. Although the MWC pretreatment
produced a higher total sugar concentration than the MW pretreatment,
the addition of an NaOH solution produced the best results in terms of
all parameters. Fourier transform infrared analysis was also performed
to observe the deterioration of molecular structures after the
application of MW and MWC.
BibTeX:
@article{ISI:000367837600025,
  author = {Inan, H and Turkay, O and Akkiris, C},
  title = {Microwave and microwave-chemical pretreatment application for agricultural waste},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2016},
  volume = {57},
  number = {6, SI},
  pages = {2590--2596},
  doi = {10.1080/19443994.2015.1069217}
}
Barisci S, Ulu F, Sillanpaa M and Dimoglo A (2016), "The usage of different forms of ferrate (VI) ion for amoxicillin and ciprofloxacin removal: density functional theory based modelling of redox decomposition", JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. Vol. 91(1), pp. 257-266.
Abstract: BACKGROUND: Decomposition of amoxicillin (AMX) and ciprofloxacin (CIP)
in aqueous suspensions by two forms of ferrate (VI) were investigated.
The effect of the initial concentration of antibiotics, pH, and ferrate
(VI) dosage were examined. Model calculations were made by the Density
Functional Theory (DFT) method (RB3LYP) taking into account the
environmental parameters. LanL2DZ and 6-311G(++)(d, p) were taken as
basic functions for the calculations. This was followed by analysis of
two redox decomposition mechanisms of the ferrate ion, with the O-2
molecule formation and electron density distribution, and the reaction
mechanism of superoxide particle formation, which participates in the
AMX and CIP oxidation process.
RESULTS: Ferrate (VI) degraded CIP more effciently than AMX in both
forms. Electrogenerated ferrate (VI) was more efficient than direct use
of its solid form. The removal efficiencies of CIP and AMX by
electrogenerated ferrate (VI) were 80.9% and 63.7%, respectively.
CONCLUSION: This study demonstrates that ferrate (VI), with its high
oxidizing capacity and coagulation effect, could be applied to the
removal of antibiotics in wastewater treatment. The results of the AMX
and CIP electron structure calculations demonstrate that electron
transfer to the molecules leads to the formation of meta-stable states
and causes the molecules to fragment. (C) 2014 Society of Chemical
Industry
BibTeX:
@article{ISI:000367951400029,
  author = {Barisci, Sibel and Ulu, Feride and Sillanpaa, Mika and Dimoglo, Anatholy},
  title = {The usage of different forms of ferrate (VI) ion for amoxicillin and ciprofloxacin removal: density functional theory based modelling of redox decomposition},
  journal = {JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY},
  year = {2016},
  volume = {91},
  number = {1},
  pages = {257--266},
  doi = {10.1002/jctb.4625}
}
Aydiner C, Sen U, Koseoglu-Imer DY and Dogan EC (2016), "Hierarchical prioritization of innovative treatment systems for sustainable dairy wastewater management", JOURNAL OF CLEANER PRODUCTION. Vol. 112(5), pp. 4605-4617.
Abstract: Multiple criteria decision making is an effective approach that can be
successfully used for revealing eco-innovative solutions in industrial
wastewater treatment by prioritizing various promising technologies.
Besides, eligible researches on emerging membrane processes viz.,
forward osmosis and membrane distillation are gaining widespread
interest in scientific communities focused on reclamation, recovery and
reuse of industrial wastewaters. In this study, the preferability of
four innovative systems compared to a traditional system was
hierarchically prioritized for environmentally benign treatment and
utilization of dairy industry wastewater using the most common tool in
multi-criteria decision making analysis, analytical hierarchy process.
The analyses were attributed to the preferences classified with regard
to the technical, economic and environmental aspects of the
alternatives. Despite the existence of both greatest importance of
energy consumption and higher energy requirements of novel solutions,
major prominent features to be provided by real-scale applications of
innovative systems were determined as more valuable multiple outcomes in
environmental protection and economic profit. The sensitivity analysis
to evaluate how the variations in the predefined weights of attributes
influence the preference priorities indicated that the decision
prioritization analysis on the novel technology selection was
sufficiently sensitive to all the main evaluation criteria. This study
proved that novel membrane technologies have more preferable features in
dairy wastewater treatment by further whey utilization and waste
minimization and more effective industrial water reuse, especially in
case of waste heat usage in membrane distillation. Finally, sustainable
dairy wastewater management in a more desirable manner than now could be
accomplished by means of technically highly efficient, economically
cost-effective and environmentally eco-innovative achievements. (C) 2015
Elsevier Ltd. All rights reserved.
BibTeX:
@article{ISI:000368207500099,
  author = {Aydiner, Coskun and Sen, Unal and Koseoglu-Imer, Derya Y and Dogan, Esra Can},
  title = {Hierarchical prioritization of innovative treatment systems for sustainable dairy wastewater management},
  journal = {JOURNAL OF CLEANER PRODUCTION},
  year = {2016},
  volume = {112},
  number = {5},
  pages = {4605--4617},
  doi = {10.1016/j.jclepro.2015.08.107}
}
Bayar S, Karagunduz A and Keskinler B (2016), "Dead-end filtration of jet loop bioreactor and activated sludge suspensions", DESALINATION AND WATER TREATMENT., mar, 2016. Vol. 57(14), pp. 6184-6192.
Abstract: Fouling is the main disadvantage of membrane processes which causes
decrease in flux with time. Although there are various mathematical
models representing fouling with time, a simplified approach is still
needed for predicting flux decline behavior over the course of
filtration. Furthermore, a comparative study to determine the effects of
floc size and extracellular polymeric substance (EPS)/soluble microbial
product (SMP) content for different biological suspension is important
in understanding of membrane fouling. The objective of this study was to
analyze filtration of two different biological suspensions and to use a
simplified model to identify the effects of SMP, EPS, and floc size on
fouling. The experimental data were successfully represented by a
simplified model with a single fitting parameter. The fouling was
independent from membrane material and pore size; however, it depended
on either floc size or the EPSp content depending on the properties of
biological suspension. When the floc size of the biological suspension
was small (e.g. jet loop membrane bioreactor), neither EPS nor SMP
contributed fouling significantly. The fouling was mainly dominated by
the small floc size. However, for biological suspension with larger floc
sizes (e.g. activated sludge system), the fouling was independent from
floc size. For such sludge samples, the fouling was well correlated with
EPSp.
BibTeX:
@article{ISI:000368609200003,
  author = {Bayar, Secil and Karagunduz, Ahmet and Keskinler, Bulent},
  title = {Dead-end filtration of jet loop bioreactor and activated sludge suspensions},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2016},
  volume = {57},
  number = {14},
  pages = {6184--6192},
  doi = {10.1080/19443994.2015.1008576}
}
Gorgec AG, Insel G, Yagci N, Dogru M, Erdincler A, Sanin D, Filibeli A, Keskinler B and Cokgor EU (2016), "Comparison of Energy Efficiencies for Advanced Anaerobic Digestion, Incineration, and Gasification Processes in Municipal Sludge Management", JOURNAL OF RESIDUALS SCIENCE & TECHNOLOGY. Vol. 13(1), pp. 57-64.
Abstract: Municipal sludge has energy content in the range of (9,000-23,000 kJ/kg)
depending upon the organic content. This entrapped energy can be
transformed into heat and electrical energies by different technologies
combining biological and thermal processes. Recently, the combination of
advanced digestion and incineration or gasification was found to be
advantageous for energy recovery. The energy balance was based upon a
full-scale wastewater treatment plant (WWTP) using conventional and
advanced treatment configurations. In this respect, the unit electricity
production from sludge was calculated to be in the range of 675-1,240
kWhE per tones of dry solids.
BibTeX:
@article{ISI:000369728600008,
  author = {Gorgec, A Gezer and Insel, G and Yagci, N and Dogru, M and Erdincler, A and Sanin, D and Filibeli, A and Keskinler, B and Cokgor, E U},
  title = {Comparison of Energy Efficiencies for Advanced Anaerobic Digestion, Incineration, and Gasification Processes in Municipal Sludge Management},
  journal = {JOURNAL OF RESIDUALS SCIENCE & TECHNOLOGY},
  year = {2016},
  volume = {13},
  number = {1},
  pages = {57--64}
}
Turkay O, Barisci S and Dimoglo A (2016), "Assessment of parameters influencing the electro activated, water character and explanation of process mechanism", PROCESS SAFETY AND ENVIRONMENTAL PROTECTION. Vol. 99, pp. 129-136.
Abstract: The physicochemical properties of electro activated water (EAW) are
highly affected by process conditions. In this context, the effects of
parameters such as brine concentration, electrolysis time and current
for EAW generation have been investigated using Response Surface
Methodology (RSM). The predictive model for each response had high
accuracy relative to R-2 values, namely, 0.85 for the oxidation
reduction potential (ORP) and 0.94 for the free chlorine concentration
(FCC). According to results, the brine concentration was the most
significant factor that affected EAW character. Moreover, electrolysis
time and brine concentration have synergetic effect on FCC. The
mechanism of the EAW production was evaluated through the cyclic
voltammogram (CV) of different brine concentrations on the graphite
electrode. With the concentration increased anodic and cathodic peaks
could be observed notably. Possible reaction pathways were evaluated on
the cathode and anode sides. The formation of Cl-2, O-2, H-2, Cl-, OH-,
H+ were determined by CV measurements. (C) 2015 The Institution of
Chemical Engineers. Published by Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000370104700013,
  author = {Turkay, Ozge and Barisci, Sibel and Dimoglo, Anatoli},
  title = {Assessment of parameters influencing the electro activated, water character and explanation of process mechanism},
  journal = {PROCESS SAFETY AND ENVIRONMENTAL PROTECTION},
  year = {2016},
  volume = {99},
  pages = {129--136},
  doi = {10.1016/j.psep.2015.10.020}
}
Barisci S, Sarkka H, Sillanpaa M and Dimoglo A (2016), "The treatment of greywater from a restaurant by electrosynthesized ferrate (VI) ion", DESALINATION AND WATER TREATMENT., may, 2016. Vol. 57(24), pp. 11375-11385.
Abstract: Greywater reuse is an attractive alternative to sustainable water
management, especially in water scarcity situations. This study sought
to determine the treatment efficiency of electrochemically produced
ferrate(VI) in greywater, assessing ferrate(VI) dose requirements and pH
effect. Greywater originating from a restaurant was employed in this
research. The treatment efficiency was investigated with regard to the
chemical oxygen demand (COD), total organic carbon, turbidity,
surfactants, and anions removal. The optimum performance was achieved
with 75mg/L of ferrate(VI) dose at pH 7. The settling characteristics of
the treated greywater were also investigated. After treatment, larger
particles and zeta potential values closer to zero were observed.
Electrochemically produced ferrate(VI) showed promising performance for
greywater treatment.
BibTeX:
@article{ISI:000371252400040,
  author = {Barisci, Sibel and Sarkka, Heikki and Sillanpaa, Mika and Dimoglo, Anatholy},
  title = {The treatment of greywater from a restaurant by electrosynthesized ferrate (VI) ion},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2016},
  volume = {57},
  number = {24},
  pages = {11375--11385},
  doi = {10.1080/19443994.2015.1038740}
}
Kobya M, Gengec E and Demirbas E (2016), "Operating parameters and costs assessments of a real dyehouse wastewater effluent treated by a continuous electrocoagulation process", CHEMICAL ENGINEERING AND PROCESSING., mar, 2016. Vol. 101, pp. 87-100.
Abstract: Treatment of a real dyehouse wastewater was studied with continuous flow
electrocoagulation (CEC) process. Removal efficiencies of COD, TOC and
turbidity were obtained as 85%, 76% and 95% for Fe electrode and
77%, 72% and 95% for Al electrode at current density of 65 Al/m(2),
inlet flow rate of 0.010 L/min, operating time of 80 min (hydraulic
retention time of 350 min), and current density of 65 A/m(2) (the
optimum operating conditions). The decrease in the inlet flow rate
(0.20-0.010 L/min) led to an increase in removal efficiencies of COD
(58-85% for Fe, 55-77% for Al), TOC (51-76% for Fe and 46-72% for
Al) and turbidity (70-95% for Fe and 72-95% for Al). Operating costs
for Fe and Al electrodes at the optimum operating conditions were
calculated as 1.562 /m(3) or 7.282 /kg COD for Fe electrode and
1.851 /m(3) or 14.257 /kg COD for Al electrode. The results
presented in this study revealed that the CEC process can be effectively
used for the removals of color, COD, TOC and turbidity from textile
wastewater. (C) 2015 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000371842100010,
  author = {Kobya, M and Gengec, E and Demirbas, E},
  title = {Operating parameters and costs assessments of a real dyehouse wastewater effluent treated by a continuous electrocoagulation process},
  journal = {CHEMICAL ENGINEERING AND PROCESSING},
  year = {2016},
  volume = {101},
  pages = {87--100},
  doi = {10.1016/j.cep.2015.11.012}
}
Aksakal F, Shvets N, Khairullina V and Dimoglo A (2016), "Structural and Electronic Factors Influencing the Selective Inhibition of COX-2", MINI-REVIEWS IN MEDICINAL CHEMISTRY. Vol. 16(7), pp. 579-594.
Abstract: Structural and electronic factors influencing the inhibition of
cyclooxygenase-1 and -2 (COX-1/COX-2) were studied by means of
Electronic-Topological Method combined with Neural Networks (ETM-NN),
molecular docking and Density Functional Theory (DFT). A series of
structurally diverse compounds containing 209 molecules were classified
in accordance with their inhibiting properties, as selectively
inhibiting and non-selectively inhibiting COX-2 receptor agents (110 and
99 molecules, correspondingly). The results obtained from the ETM-NN
calculations gave us possibility of selecting those pharmacophoric
molecular fragments, which allow for the search of new selective
inhibitors of COX-2 with high probability of realization. The final
selection of pharmacophores and anti-pharmacophores found was taken as a
basis for a system designed for the COX-2 inhibitory activity
prediction. Analysis of the electron density distribution showed that
more effective binding with COX-2 receptor was observed for selective
inhibitors. To make an assessment of these interactions, calculations of
stabilization energies were carried out for the ligand-receptor
complexes. From the results of the docking and from the analysis of
electronic structures of active sites of enzymes, some peculiarities of
ligand-receptor binding and its influence on the selectivity of the
COX-2 relative to COX-1 inhibition were elucidated. 95% of compounds
were recognized correctly, as the most active ones, by the system of
prediction designed. Thus, the system being the result of the study is
capable of predicting the selective inhibitory activity of COX-2
successfully. As a consequence, it can be used both for computer
screening and synthesis of potent inhibitors of COX-2 with molecular
skeletons that may vary considerably.
BibTeX:
@article{ISI:000372787600006,
  author = {Aksakal, Fatma and Shvets, Natali and Khairullina, Veronika and Dimoglo, Anatholy},
  title = {Structural and Electronic Factors Influencing the Selective Inhibition of COX-2},
  journal = {MINI-REVIEWS IN MEDICINAL CHEMISTRY},
  year = {2016},
  volume = {16},
  number = {7},
  pages = {579--594},
  doi = {10.2174/1389557515666151016124503}
}
Doruk N, Yatmaz HC and Dizge N (2016), "Degradation Efficiency of Textile and Wood Processing Industry Wastewater by Photocatalytic Process Using In Situ Ultrafiltration Membrane", CLEAN-SOIL AIR WATER., mar, 2016. Vol. 44(3), pp. 224-231.
Abstract: The hybrid membrane photocatalytic reactor (MPR) in this study was
constructed by submerging a flat polyethersulfone membrane module into a
ZnO or TiO2 slurry photocatalytic reactor for raw wastewater treatment.
The short and long term MPR performance was investigated for the
degradation of textile and wood processing industry wastewater. The
different operational parameters such as the catalyst type, catalyst
loading, initial wastewater concentration, light type, and semiconductor
powder type affecting the performance of the reactor were initially
evaluated using a batch system without a membrane module. After the
optimization of the operating conditions, the long term studies were
performed by the MPR. Nearly 100% color and 30-55% chemical oxygen
demand (COD) removal could be reached at a hydraulic retention time of 6
h for both wastewater effluents. Moreover, reverse osmosis experiments
were applied on MPR ultrafiltration effluent for further COD removal and
up to 88% COD removal efficiency could be obtained. The color and
organic matter degradation efficiency showed that the catalyst can be
reused effectively in MPR. In this hybrid design, the membrane module
served also as a separator which is very advantageous in keeping
catalyst powder in suspension during the operation. The results
indicated that the effluent water can be used as process water in the
industry.
BibTeX:
@article{ISI:000372953200001,
  author = {Doruk, Nurdan and Yatmaz, Huseyin Cengiz and Dizge, Nadir},
  title = {Degradation Efficiency of Textile and Wood Processing Industry Wastewater by Photocatalytic Process Using In Situ Ultrafiltration Membrane},
  journal = {CLEAN-SOIL AIR WATER},
  year = {2016},
  volume = {44},
  number = {3},
  pages = {224--231},
  doi = {10.1002/clen.201400203}
}
Engin GO, Omurlu N and Oncel MS (2016), "Strength and durability characterization of pelletized coal-biomass household briquettes", INTERNATIONAL JOURNAL OF GREEN ENERGY. Vol. 13(2), pp. 132-137.
Abstract: Increase in waste sludge disposal is always seen as a problem from the
point of production industry. However, it is clear that the reuse and
recycle of sewage sludge could be a serious economic input. The most
important action should be to determine the sludge characterizations and
direct the producers towards appropriate reuse and recycling
opportunities. In this study, reuse method was examined to produce coal
briquette, which will constitute an example for waste sludge. In order
to make use of the waste sludge, five different coal briquette samples
were produced by mixing powdered coal and bitumen together with waste
sludge, at different ratios. The overall results indicated that the
sample named CB3 having 70% powdered coal, 20% waste sludge, and 10%
bitumen was found to be the optimum coal briquette among the other
samples produced. The proximate analysis of the optimum briquette sample
was carried out according to the Turkish standards and regulations and
it was found out that the produced briquette coal can have commercial
value with a gross calorific value of 30.03 MJ/kg and 7.30% ash
content.
BibTeX:
@article{ISI:000373107200002,
  author = {Engin, Guleda Onkal and Omurlu, Nilufer and Oncel, Mehmet Salim},
  title = {Strength and durability characterization of pelletized coal-biomass household briquettes},
  journal = {INTERNATIONAL JOURNAL OF GREEN ENERGY},
  year = {2016},
  volume = {13},
  number = {2},
  pages = {132--137},
  doi = {10.1080/15435075.2014.952418}
}
Barlik N, Keskinler B and Kocakerim MM (2016), "Hexavalent chromium removal performance of anionic functionalized monolithic polymers: column adsorption, regeneration and modelling", WATER SCIENCE AND TECHNOLOGY., mar, 2016. Vol. 73(6), pp. 1279-1286.
Abstract: Anionic functionalized monolithic macro-porous polymers were used for
the removal of hexavalent chromium(VI) anions from aqueous solution in
column experiments. At a flux of 1.0 cm min and 30 mg Cr(VI) L-1 feed
concentration, breakthrough capacity and apparent capacity were 0.066 g
Cr(VI) g(-1) anionic monolith and 0.144 g Cr(VI) g(-1) anionic monolith,
respectively. The degree of column utilization was found to lie in the
range 41-46%. Two kinetic models, theoretical and Thomas models, were
applied to experimental data to predict the breakthrough curves and to
determine the characteristic parameters of the column useful for process
design. The simulation of the whole breakthrough curve was effective
with the models. At a flux of 1.0 cm min and 30 mg Cr(VI) L-1 feed
concentration, the dispersion coefficient and adsorption equilibrium
constant (K) were 3.14 x 10(-7) m s(-1) and 3,840, respectively. Also,
Thomas model parameters k(1) (rate constant of adsorption) and q(m)
(equilibrium solid-phase concentration of sorbed solute) were 1.08 x
10(-3) L mg(-1) min(-1) and 0.124 g g(-1), respectively. After reaching
equilibrium adsorption capacity, the monoliths were regenerated using 1
N HCl and were subsequently re-tested. It was found that the
regeneration efficiency reduced from 98% after second usage to 97%
after the third usage.
BibTeX:
@article{ISI:000374406800006,
  author = {Barlik, Necla and Keskinler, Bulent and Kocakerim, M Muhtar},
  title = {Hexavalent chromium removal performance of anionic functionalized monolithic polymers: column adsorption, regeneration and modelling},
  journal = {WATER SCIENCE AND TECHNOLOGY},
  year = {2016},
  volume = {73},
  number = {6},
  pages = {1279--1286},
  doi = {10.2166/wst.2015.602}
}
Cetin B (2016), "Investigation of PAHs, PCBs and PCNs in soils around a Heavily Industrialized Area in Kocaeli, Turkey: Concentrations, distributions, sources and toxicological effects", SCIENCE OF THE TOTAL ENVIRONMENT. Vol. 560, pp. 160-169.
Abstract: Soil is an important environmental mediumreflecting the level and the
spatial distribution of air pollutants such as polycyclic aromatic
hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), polychlorinated
naphthalenes (PCNs). Soil concentrations of PCNs measured in the present
study were generally higher and PCBs concentrations were considerably
higher than those reported in the literature, while PAHs concentrations
were comparable. Combustion related PCNs congener ratios to their total
concentrations and PAHs diagnostic ratios suggested the substantial
contribution of combustion sources and the statistically significant
correlation between PCBs and PCNs (r=0.88) indicated that these POPs
were emitted from the common sources. Principal Component Analysis was
also performed to further assess the possible sources of individual
POPs. The results showed the contribution of traffic, petroleumand
coal/biomass combustion and iron-steel production. Toxicological effects
of POPs in soil were investigated. BaP was used as the marker of
carcinogenic PAHs. Seven carcinogenic PAHs concentrations (Sigma(7c)PAH)
including BaA, CHR, BbF, BkF, BaP, IcdP and DahA were also used as a
parameter to evaluate carcinogenic potency of PAHs. As PCBs and PCNs
show dioxin-like toxicities, their toxicological implication were
estimated using TCDD equivalence. The results show that the study area
faced with severe environmental problems even though the data sets
without the complete set of dioxin like PCBs and PCNs would show only a
part of the whole toxicological picture. (C) 2016 Elsevier B.V. All
rights reserved.
BibTeX:
@article{ISI:000375137100018,
  author = {Cetin, Banu},
  title = {Investigation of PAHs, PCBs and PCNs in soils around a Heavily Industrialized Area in Kocaeli, Turkey: Concentrations, distributions, sources and toxicological effects},
  journal = {SCIENCE OF THE TOTAL ENVIRONMENT},
  year = {2016},
  volume = {560},
  pages = {160--169},
  doi = {10.1016/j.scitotenv.2016.04.037}
}
Cetin B, Odabasi M and Bayram A (2016), "Wet deposition of persistent organic pollutants (POPs) in Izmir, Turkey", ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH., may, 2016. Vol. 23(9), pp. 9227-9236.
Abstract: Concentrations of several polychlorinated biphenyls (PCBs),
organochlorine pesticides (OCPs), polycyclic aromatic hydrocarbons
(PAHs), and polybrominated diphenyl ethers (PBDEs) were measured in
precipitation (n = 33) at a suburban site in Izmir, Turkey. Total
(dissolved + particle) volume weighted mean (VWM) concentrations for
Sigma(16)PAHs, Sigma(18)PCBs, Sigma(17)OCPs, and Sigma 7PBDEs were 785,
19.2, 50.5, and 29.6 ng l(-1), respectively. Low molecular weight (LMW)
compounds (acenaphthylene, fluorene, phenanthrene) and congeners
(PCB-18, 28, and 31) dominated the PAH and PCB concentrations,
respectively. For PBDEs, BDE-209, and for OCPs, chlorpyrifos, a
currently used pesticide, were the predominant compounds. Annual Sigma
7PBDEs flux was 18.74 mu g m(-2) year(-1). PBDE fluxes were mainly in
dissolved phase for all congeners except BDE-209 which had comparable
proportions in both phases. Annual flux for Sigma(16)PAHs was 497.4 mu g
m(-2) year(-1); higher molecular weight (MW) PAH fluxes had comparable
amounts in both phases while lower MW ones were mostly in dissolved
phase. Wet deposition fluxes for Sigma(18)PCBs and Sigma(17)OCPs were
9.40 and 31.94 mu g m(-2) year(-1), respectively, and they were
predominantly in dissolved phase. Wet deposition fluxes were compared to
previously measured annual dry deposition fluxes at the study site to
determine their relative contributions to annual total (dry particle +
wet) deposition. Dry deposition was the major removal mechanism for most
of the PAHs and PCBs contributing textgreater80 % to total (wet + dry)
deposition. However, both processes were comparable for PBDEs. Wet
deposition was the predominant process for some OCPs such as
alpha-chlordane, gamma-chlordane, and trans-nonachlor while both
processes were comparable for chlorpyrifos and heptachlor epoxide.
BibTeX:
@article{ISI:000375412600100,
  author = {Cetin, Banu and Odabasi, Mustafa and Bayram, Abdurrahman},
  title = {Wet deposition of persistent organic pollutants (POPs) in Izmir, Turkey},
  journal = {ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH},
  year = {2016},
  volume = {23},
  number = {9},
  pages = {9227--9236},
  doi = {10.1007/s11356-016-6183-6}
}
Caliskan Y, Bektas N and Tekbas M (2016), "ANAEROBIC COMPOSTING OF ORGANIC FRACTION OF MUNICIPAL SOLID WASTE", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 25(4), pp. 1097-1104.
Abstract: The amount of solid waste has been increasing by rapid population
growth, improved technology, and economic development and changing
consumption habits. This increase leads to find different municipal
solid waste (MSW) management alternatives. Anaerobic composting offers a
cost-effective treatment strategy to MSW management alternatives.
Therefore the aim of this study was selected to investigate anaerobic
composting process for food waste from catering company since large
amount of organic wastes are generated from this type of sources.
Anaerobic bioreactor was filled with mixed organic solid waste and
monitored throughout 24 weeks. Leachate was re-circulated instead of
mechanic mixing. Some parameters of leachate such as pH, COD, BOD, TKN,
NH3-N, alkalinity, VFAs were analysed to gain information about
biodegradability and stabilization of the anaerobic compost process.
Compost which is the final product of our process also analysed at the
end of the study and it was seen that the compost is stable and can be
used for agricultural purposes.
BibTeX:
@article{ISI:000375826700014,
  author = {Caliskan, Yasemin and Bektas, Nihal and Tekbas, Mesut},
  title = {ANAEROBIC COMPOSTING OF ORGANIC FRACTION OF MUNICIPAL SOLID WASTE},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2016},
  volume = {25},
  number = {4},
  pages = {1097--1104}
}
Yamaner C, Ayvaz M, Konak R, Tan N, Kosoglu I and Dimoglo A (2016), "EFFICACY OF NEUTRALISED ELECTROLYSED WATER AND MILD HEAT AGAINST FOODBORNE PATHOGENS ISOLATED FROM FICUS CARICA", ITALIAN JOURNAL OF FOOD SCIENCE. Vol. 28(2), pp. 208-220.
Abstract: Problems with microorganism toxins in dried fig exports are becoming
very important. Chlorine-based sanitizers are effective way of
controlling microorganisms, but on the other hand their reaction with
natural organic and inorganic matter may potentially form carcinogenic
products. Therefore, different sanitizers for the disinfection of food
and food contact surfaces are required as an alternative to
chlorine-based sanitizers. Some earlier studies revealed that
neutralised electrolysed water (NEW) may be a potential substitute for
cleaning and sanitizing agents in packaged products. In order to make a
contribution to solve toxins problems, the antibacterial and antifungal
effect of neutralised electrolysed water (NEW) on the foodborne
pathogens were evaluated in this study. Spores of Aspergillus flavus and
Penicillium expansum were isolated from the surface of fig fruits.
Escherichia coli and Bacillus cereus known to occur on the surface of
figs were also evaluated. Vegetative cells and spores of bacterium and
fungi were exposed to five different concentrations of NEW (100, 75, 25,
5 and 1%) at three different temperatures (22, 50 and 70 degrees C) for
1, 3 and 5 min. According to the results, at 22 degrees C, 1%
neutralised electrolysed water exposure for 1 min effectively decreased
the number of vegetative cells of E. coli and B. cereus by approximately
8.5 log cfu/ml and 6.3 log cfu/ml, respectively. At 50 degrees C, 5%
neutralised electrolysed water exposure for 1 min significantly reduced
the A. flavus and P. expansum spore numbers by 5.54 log cfu/ml and 7 log
cfu/ml, respectively. With the effect of mild temperature (22-50 degrees
C), low chlorine neutralised electrolysed water (9.22 mg/l - 33.85 mg/l
available chlorine concentrations) showed a strong antibacterial and
antifungal activity against foodborne pathogens. As a conclusion,
neutralised electrolysed water can be used widely as a sanitizer in fig
enterprises, instead of high cost chlorine based disinfectants.
BibTeX:
@article{ISI:000377012900004,
  author = {Yamaner, C and Ayvaz, M and Konak, R and Tan, N and Kosoglu, I and Dimoglo, A},
  title = {EFFICACY OF NEUTRALISED ELECTROLYSED WATER AND MILD HEAT AGAINST FOODBORNE PATHOGENS ISOLATED FROM FICUS CARICA},
  journal = {ITALIAN JOURNAL OF FOOD SCIENCE},
  year = {2016},
  volume = {28},
  number = {2},
  pages = {208--220}
}
Chumakov Y, Aksakal F, Dimoglo A, Ata A and Palomares-Sanchez SA (2016), "First-Principles Study of Thermoelectric Properties of Covalent Organic Frameworks", JOURNAL OF ELECTRONIC MATERIALS. Vol. 45(7), pp. 3445-3452.
Abstract: Covalent organic frameworks (COFs) are new emerging functional porous
materials. Strong covalent bonds result in molecular building blocks
that can be arranged in layered two-dimensional (2D) or
three-dimensional (3D) periodic networks. However, to the best of our
knowledge, there have been no reports on experimental and theoretical
studies of thermoelectrical properties of COFs to date. Therefore,
density functional theory (DFT) and the Boltzmann transport equation
have been applied in this work to calculate the semiclassical transport
coefficients for phthalocyanine (Pc)-based NiPc, NiPc-benzothiadiazole
(BTDA), and Pc COFs. Owing to the well-ordered stacking of the
phthalocyanine units and linkers in these compounds, charge-carrier
transport is facilitated in the stacking direction. In all studied
compounds, the highly directional character of pi-orbitals provides
band-structure engineering and produces a type of low-dimensional hole
transport along the stacking direction. All studied compounds are
indirect semiconductors. The low-dimensional transport of holes and the
localized states in both valence and conduction bands prevent the
electron-hole compensation effect in the Seebeck coefficients,
correlating with the large Seebeck coefficients of the studied
compounds. Insertion of the electron-deficient building block
benzothiadiazole in the NiPc-BTDA COF leads to positive Seebeck
coefficients along the a-, b-, and c-directions. The relaxation time was
estimated in our investigations from DFT band-structure calculations and
the experimentally defined mobility, leading to determination of the
electrical conductivity and electronic contribution to the thermal
conductivity, as well as figure of merit (ZT) estimation. Ni atom
provided greater electrical conductivity along the c-direction in
comparison with metal-free Pc COF, and NiPc COF showed the highest
thermoelectric performance among the studied COFs.
BibTeX:
@article{ISI:000377434100027,
  author = {Chumakov, Yurii and Aksakal, Fatma and Dimoglo, Anatholy and Ata, Ali and Palomares-Sanchez, Salvador A},
  title = {First-Principles Study of Thermoelectric Properties of Covalent Organic Frameworks},
  journal = {JOURNAL OF ELECTRONIC MATERIALS},
  year = {2016},
  volume = {45},
  number = {7},
  pages = {3445--3452},
  doi = {10.1007/s11664-016-4540-3}
}
Dogan EC, Yasar A, Sen U and Aydiner C (2016), "Water recovery from treated urban wastewater by ultrafiltration and reverse osmosis for landscape irrigation", URBAN WATER JOURNAL. Vol. 13(6), pp. 553-568.
Abstract: Techno-economic feasibility of water recovery from secondary effluents
of an urban wastewater treatment plant (WWTP) for landscape irrigation
was investigated considering two distinctive strategies: ultrafiltration
(UF)/chlorination and UF/reverse osmosis (RO). Experimental performance
evaluations were conducted separately for UF membranes and for different
RO trans-membrane pressures. The quality of the effluent recovered by
the UF/RO system was in accordance with the national and international
guidelines. The produced reuse water was first class quality according
to the national guideline for all parameters except sodium adsorption
ratio (SAR), which can be eliminated readily by direct addition of KCl
into the recovered water. Estimated field-scale costs indicated that
UF/RO yielded a total cost of US12,500,000-13,600,000 with annual
operating cost being US482,000-533,000 at 5-20 bar. The economic
estimations guaranteed reimbursement with US7,600,000-7,400,000 net
present value, 0.22-0.39 year payback time, US0.44-0.49/m(3) treatment
cost, and a benefit/cost ratio of 0.57.
BibTeX:
@article{ISI:000377774700001,
  author = {Dogan, Esra Can and Yasar, Aynur and Sen, Unal and Aydiner, Coskun},
  title = {Water recovery from treated urban wastewater by ultrafiltration and reverse osmosis for landscape irrigation},
  journal = {URBAN WATER JOURNAL},
  year = {2016},
  volume = {13},
  number = {6},
  pages = {553--568},
  doi = {10.1080/1573062X.2014.992917}
}
Eyvaz M (2016), "Treatment of Brewery Wastewater with Electrocoagulation: Improving the Process Performance by Using Alternating Pulse Current", INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE. Vol. 11(6), pp. 4988-5008.
Abstract: The main aim of this study is to investigate the technical and economic
feasibility of electrocoagulation process on the treatment of brewing
industry effluents. Effects of current type on process performance were
also stated with a batch operated electrocoagulation reactor including
four plate electrodes. Two electrode materials, Fe and Al, were
separately employed in parallel connection. A low-moderate strength
brewery wastewater was selected as wastewater and model electrolyte
solution. Direct current power supply with an adjustable time relay by
which rectangular wave was produced was combined with sacrificial
electrodes. Performance of the electrocoagulation process was analyzed
in terms of operating parameters such as, pH, current density, operating
time, electrode material, and current type with removal efficiencies,
only some of which were presented in figures and others were given in
tables due to the numbers of parameters. Both electrode materials
exposed similar pollutant removal performances while Al electrode was
found cost effective one. However, alternating pulse current was found
superior to direct current, namely, it provided higher removal rates in
shorter operating times.
BibTeX:
@article{ISI:000378559300062,
  author = {Eyvaz, Murat},
  title = {Treatment of Brewery Wastewater with Electrocoagulation: Improving the Process Performance by Using Alternating Pulse Current},
  journal = {INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE},
  year = {2016},
  volume = {11},
  number = {6},
  pages = {4988--5008},
  doi = {10.20964/2016.06.11}
}
Turkay O, Barisci S and Dimoglo A (2016), "Kinetics and mechanism of methylene blue removal by electrosynthesized ferrate(VI)", SEPARATION SCIENCE AND TECHNOLOGY. Vol. 51(11), pp. 1924-1931.
Abstract: The oxidation of methylene blue (MB) by electrosynthesized ferrate(VI)
in a semi-batch reactor is investigated. The effects of pH, Fe(VI) dose
and initial MB concentration on the efficiency of the degradation
process were studied. The original pH of MB solution was found more
effective on the degradation and colour removal as 96.82% MB removal
and 40.36% colour removal were gained. Initial MB solution and Fe(VI)
dose affected the removal efficiencies. Degradation of MB by Fe(VI) was
the second-order reaction kinetics. The density functional theory (DFT)
analysis confirmed that density is intended mostly on the phenyl rings
and least of all on the bonding orbitals of the middle heterocycle of
MB.
BibTeX:
@article{ISI:000381286400015,
  author = {Turkay, Ozge and Barisci, Sibel and Dimoglo, Anatholy},
  title = {Kinetics and mechanism of methylene blue removal by electrosynthesized ferrate(VI)},
  journal = {SEPARATION SCIENCE AND TECHNOLOGY},
  year = {2016},
  volume = {51},
  number = {11},
  pages = {1924--1931},
  doi = {10.1080/01496395.2016.1182189}
}
Mansouri A, Rihani R, Laoufi AN and Ozkan M (2016), "Production of bioethanol from a mixture of agricultural feedstocks: Biofuels characterization", FUEL. Vol. 185, pp. 612-621.
Abstract: Bioethanol production from a mixture of agricultural feedstock was
carried out in a batch fermenter. To study the effect of optimal mixture
ratio of fruit juices (100% dates; 70% dates + 30% grapes, 50% dates
+ 50% grapes, 30% dates + 70% grapes, 100% grapes) on ethanol yield
(g ethanol/g sugar), different parameters have been monitored such as
ethanol yield, total sugar, ammoniacal nitrogen, pH. It was found that
the mixture of Mech Degla dates and grapes juices has the higher
bioethanol concentration than that obtained from a single juice from one
kind of fruit. Higher bioethanol production 155.5 g/L at 72 h was
obtained when 30% dates juice was blended with 70% grapes juice. In
such case, the higher initial sugar concentration is close to 228.34
g/L, and the pH droped from 4.5 to 3.87. The Luedeking-Piret model was
used to describe the bioethanol production. A good agreement was found
between simulated and experimental data. The influence of some physical
properties on the addition of ethanol to lead-free gasoline has been
studied. It was found that the addition of 5% of ethanol, to lead-free
gasoline raises the RON to around 96.4, that can improve its octane
number by 2 points. (C) 2016 Elsevier Ltd. All rights reserved.
BibTeX:
@article{ISI:000382248700063,
  author = {Mansouri, Assia and Rihani, Rachida and Laoufi, Aicha Nadia and Ozkan, Melek},
  title = {Production of bioethanol from a mixture of agricultural feedstocks: Biofuels characterization},
  journal = {FUEL},
  year = {2016},
  volume = {185},
  pages = {612--621},
  doi = {10.1016/j.fuel.2016.08.008}
}
Bayar S, Karagunduz A and Keskinler B (2016), "Influences of electroosmosis and electrophoresis on permeate flux and membrane fouling in submerged membrane bioreactors (SMBRs)", WATER SCIENCE AND TECHNOLOGY. Vol. 74(3), pp. 766-776.
Abstract: The objective of this study was to investigate the influences of
electroosmosis (EO) and electrophoresis (EP) on the permeate flux in
submerged membrane bioreactors. When a polymeric membrane is placed in
between an anode and a cathode, both EO and EP occur simultaneously,
causing enhancement in flux. Results showed that after 150 min of
filtration, the permeate fluxes were 60, 115, 175 and 260 L/m(2)/h at 0,
30, 40 and 50 V, respectively. It was shown that the EO was linearly
changing with increasing voltage, reaching up to 54 L/m(2)/h at 50 V. EP
was found to be a significant process in removing soluble microbial
products from the membrane surface, resulting in an increase in permeate
flux as the filtration progressed. About 20-fold of smaller protein and
carbohydrate concentrations were found in the cake layer when the
electrical field (EF) was applied. However, the EF application promoted
pore fouling, because of the calcium and magnesium scaling.
BibTeX:
@article{ISI:000382252700023,
  author = {Bayar, Secil and Karagunduz, Ahmet and Keskinler, Bulent},
  title = {Influences of electroosmosis and electrophoresis on permeate flux and membrane fouling in submerged membrane bioreactors (SMBRs)},
  journal = {WATER SCIENCE AND TECHNOLOGY},
  year = {2016},
  volume = {74},
  number = {3},
  pages = {766--776},
  doi = {10.2166/wst.2016.280}
}
Sevimoglu O and Rogge WF (2016), "Seasonal size-segregated PM10 and PAH concentrations in a rural area of sugarcane agriculture versus a coastal urban area in Southeastern Florida, USA", PARTICUOLOGY. Vol. 28, pp. 52-59.
Abstract: Airborne particulate matter (PM) is of health and environmental concern
not only in highly urbanized areas, but also in rural areas that are
used for intensive agricultural purposes. In this study, PM
size-segregated samples were collected simultaneously for 12 months in a
small town (Belle Glade, Florida), which is the center of a vast
sugarcane growing area and at Delray Beach, a coastal city in Palm Beach
County, Florida. During the winter sampling period, when sugarcane
foliage is burned just before harvesting to reduce the amount of plant
matter to be handled, PM10 levels were 50% or higher than otherwise
measured, indicating that sugarcane harvesting and processing is a major
local source for PM10. For the rest of the year, PM10 levels at both
sites are similar, suggesting that ambient PM levels at both sites are
impacted by the major urban centers in Southern Florida. During late
July and early August, the PM10 levels at both sites were substantially
elevated and revealed the typical red-brownish color of Saharan dust.
This has been reported to occur frequently with suitable meteorological
conditions over the Atlantic Ocean coupled with a Sahara dust storm
event. During the sugarcane harvesting season at Belle Glade, the
concentrations of PAHs associated with PM10 were up to 15 times higher
than those measured during the summer growing season, indicating a
substantially higher exposure of the rural population to these often
mutagenic and carcinogenic compounds. (C) 2016 Chinese Society of
Particuology and Institute of Process Engineering, Chinese Academy of
Sciences. Published by Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000382351600007,
  author = {Sevimoglu, Orhan and Rogge, Wolfgang F},
  title = {Seasonal size-segregated PM10 and PAH concentrations in a rural area of sugarcane agriculture versus a coastal urban area in Southeastern Florida, USA},
  journal = {PARTICUOLOGY},
  year = {2016},
  volume = {28},
  pages = {52--59},
  doi = {10.1016/j.partic.2015.09.013}
}
Sakar H, Canbolat CB, Karagunduz A and Keskinler B (2016), "Sulfate removal from nanofiltration concentrate of alkaloid wastewater by electrodialysis", DESALINATION AND WATER TREATMENT. Vol. 57(44), pp. 21003-21014.
Abstract: Treatment of alkaloid wastewater is a challenging task because of its
complex mixture of contaminants with high chemical oxygen demand and
sulfate concentrations. The aim of this study was to investigate the
removal of sulfate from nanofitration (NF) concentrate of alkaloid
wastewater by electrodialysis (ED). The effectiveness of ED process was
evaluated using synthetic sodium sulfate solutions at three different
concentrations (20, 30, and 40g/L). The removal efficiencies ranged from
95 to 98% at all applied voltages (5-20V). Energy consumption for 95%
sulfate removal was linearly increasing with applied voltage. The
influences of diluate and concentrate flow rates on sulfate removal were
investigated at 20, 30, and 40 L/h. At least 95% of deionization
efficiencies were achieved at all flow rates. The performance of three
different NF membranes (NF270, NF90, and NF245) was investigated in
order to remove sulfate from biologically treated alkaloid wastewater.
Ninety-nine percent of sulfate retained in membrane concentrate in NF90
and NF245 membranes. Finally, the sulfate removal efficiencies from NF
concentrate were determined by ED process. Up to 98% of deionization
efficiencies were achieved. However, both ED time to teach 95%
efficiency and the energy consumptions for the same degree of treatment
were much greater that those obtained using synthetic wastewater.
BibTeX:
@article{ISI:000382975100034,
  author = {Sakar, Hacer and Canbolat, Cigdem Balcik and Karagunduz, Ahmet and Keskinler, Bulent},
  title = {Sulfate removal from nanofiltration concentrate of alkaloid wastewater by electrodialysis},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2016},
  volume = {57},
  number = {44},
  pages = {21003--21014},
  doi = {10.1080/19443994.2015.1125803}
}
Basaran G, Kavak D, Dizge N, Asci Y, Solener M and Ozbey B (2016), "Comparative study of the removal of nickel(II) and chromium(VI) heavy metals from metal plating wastewater by two nanofiltration membranes", DESALINATION AND WATER TREATMENT. Vol. 57(46), pp. 21870-21880.
Abstract: The treatment of aviation industry metal plating wastewater containing
Ni2+ and Cr6+ by nanofiltration was investigated in this study. Two
commercial membranes (NF90 and NF270) and two membrane filtration
systems (dead end and cross flow) were used. The effects of both the
transmembrane pressure (10, 20, and 30 bar) and the feed pH (3.5, 7, and
10) on the membrane performance were analyzed. The rejection of both
nickel and chromium ions increased with increasing pH but did not
considerably change by the pressure difference for both membranes. The
optimum conditions were found to be at 30 bar with a pH of 10 for both
the NF90 and NF270 membranes. Under optimum conditions for the NF90
membrane, the rejection values of Ni2+ and Cr6+ were found to be 99.2
and 96.5%, respectively. For the NF270 membrane, the rejection values
of Ni2+ and Cr6+ were 98.7 and 95.7%, respectively.
BibTeX:
@article{ISI:000384060500019,
  author = {Basaran, Gizem and Kavak, Duygu and Dizge, Nadir and Asci, Yeliz and Solener, Musa and Ozbey, Bahar},
  title = {Comparative study of the removal of nickel(II) and chromium(VI) heavy metals from metal plating wastewater by two nanofiltration membranes},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2016},
  volume = {57},
  number = {46},
  pages = {21870--21880},
  doi = {10.1080/19443994.2015.1127778}
}
Aslan T, Arslan S, Eyvaz M, Guclu S, Yuksel E and Koyuncu I (2016), "A novel nanofiber microfiltration membrane: Fabrication and characterization of tubular electrospun nanofiber (TuEN) membrane", JOURNAL OF MEMBRANE SCIENCE. Vol. 520, pp. 616-629.
Abstract: Nanofibers fabricated with electrospinning method have several prominent
properties such as high specific surface area, high porosity and uniform
pore size distribution in nanoscale or microscale. These unique features
are vital for separation processes in water and wastewater treatment
applications. In this study, we have developed a new type of nanofiber
electrospun membrane for the first time by collecting nanofibers on a
hollow braided rope. The nanofiber membranes were characterized with
Scanning Electron Microscope images, pore size, contact angle and
porosity measurements. Filtration performances of tubular nanofiber and
a commercial hollow braided reinforced membrane were determined for both
standard particle solutions and surface water under low vacuum
pressures. The novel tubular nanofiber (TuEN) membranes exhibited high
water fluxes in even low vacuum pressures, relatively high removal
efficiencies of turbidity (95%), total organic carbon (29%) and UV254
(45%) compared to other microfiltration membranes. We claim that the
tubular nanofiber membrane will attract more attention in coming years
in the fields of water and wastewater treatment. (C) 2016 Elsevier B.V.
All rights reserved.
BibTeX:
@article{ISI:000384785000060,
  author = {Aslan, Taha and Arslan, Serkan and Eyvaz, Murat and Guclu, Serkan and Yuksel, Ebubekir and Koyuncu, Ismail},
  title = {A novel nanofiber microfiltration membrane: Fabrication and characterization of tubular electrospun nanofiber (TuEN) membrane},
  journal = {JOURNAL OF MEMBRANE SCIENCE},
  year = {2016},
  volume = {520},
  pages = {616--629},
  doi = {10.1016/j.memsci.2016.08.014}
}
Barisci S and Turkay O (2016), "The performance of electrosynthesised ferrate (VI) ion, electrocoagulation and peroxi-electrocoagulation processes for degradation of cholesterol-lowering drug atorvastatin", DESALINATION AND WATER TREATMENT. Vol. 57(53), pp. 25561-25571.
Abstract: The degradation of atorvastatin (ATV) by electrosynthesised ferrate (VI)
ion, electrocoagulation (EC) and peroxi-electrocoagulation (p-EC) were
compared in this study. The effects of pH, Fe (VI) dose, electrode type,
current density, supporting electrolyte concentration (SEC) and hydrogen
peroxide concentration were investigated. All processes were affected by
pH. Acidic pH values showed better efficiencies for each process, which
was related to the drug's solubility properties and dominant produced
species with acidic values. Hybrid electrodes were found to be the most
efficient electrode pairs. In EC, optimum pH value, current density and
SEC were determined to be 3, 2.5mA/cm(2) and 200mg/L, respectively. The
preferred pH and H2O2 concentration in the p-EC process were found to be
3 and 250mg/L, respectively. Eighty-two per cent specific drug removal
and 77% TOC removal were achieved. The performance of the processes for
ATV degradation were found to be in the order of
peroxi-electrocoagulationtextgreaterFe(VI)textgreaterelectrocoagulation.
BibTeX:
@article{ISI:000385674500023,
  author = {Barisci, Sibel and Turkay, Ozge},
  title = {The performance of electrosynthesised ferrate (VI) ion, electrocoagulation and peroxi-electrocoagulation processes for degradation of cholesterol-lowering drug atorvastatin},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2016},
  volume = {57},
  number = {53},
  pages = {25561--25571},
  doi = {10.1080/19443994.2016.1151383}
}
Barlik N, Keskinler B, Kocakerim MM and Akay G (2016), "Functionalized PolyHIPE polymer monoliths as an anion-exchange media for removal of nitrate ions from aqueous solutions", DESALINATION AND WATER TREATMENT. Vol. 57(55), pp. 26440-26447.
Abstract: Monolithic anion exchanger PolyHIPE media were used for the removal of
nitrate anions from aqueous solutions. Both equilibrium and column
adsorption tests and regeneration tests were carried out. The
suitability of the Langmuir adsorption model to the equilibrium data was
investigated. The maximum adsorption capacity was 0.215meq/g as per
Langmuir isotherm at 20 degrees C. At a flow rate of 5ml/min
(corresponding flux was 1.0cm/min) and 150mg/L nitrate feed
concentration, breakthrough capacity and apparent capacity were 1.336meq
/g resin and 2.842meq /g resin, respectively. Column experimental tests
were conducted to provide data for theoretical modeling and to verify
the system performance of the process. The theoretical column model
adopted in this work was found to describe well, the ion-exchange
breakthrough characteristics. After reaching equilibrium adsorption
capacity, the monoliths were regenerated using 1N HCl and were
subsequently retested. It was found that the regeneration efficiency
reduced from 99% after second usage to 95% after the third usage.
BibTeX:
@article{ISI:000386703400006,
  author = {Barlik, Necla and Keskinler, Bulent and Kocakerim, M Muhtar and Akay, Galip},
  title = {Functionalized PolyHIPE polymer monoliths as an anion-exchange media for removal of nitrate ions from aqueous solutions},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2016},
  volume = {57},
  number = {55},
  pages = {26440--26447},
  doi = {10.1080/19443994.2016.1164083}
}
Eyvaz M, Aslan T, Arslan S, Yuksel E and Koyuncu I (2016), "Recent developments in forward osmosis membrane bioreactors: a comprehensive review", DESALINATION AND WATER TREATMENT. Vol. 57(59), pp. 28610-28645.
Abstract: Forward osmosis or osmotic membrane bioreactor (FOMBR) has attracted
great attention for wastewater treatment and reuse since conceptually
introduced as a process. It has been proposed to reduce the high energy
consumption in the conventional MBR, has lower membrane fouling
propensity, and produce higher quality water. Moreover, RO process can
be used after FOMBR to reconcentrate the diluted DS to be used for FO
again. Besides significant advantages, when compared to conventional
MBRs; lower water flux, concentration polarization, and salt
accumulation because of high retention of FO in the bioreactor still
remains as major drawbacks and challenges of FOMBR systems that need to
be solved. In the last few years, many advances in development of FOMBR
are stated to overcome the drawbacks of the system. The researches
focused on manufacturing of high performance FO membranes and
orientation, utilizing various different draw solutions providing
required osmotic pressure and minimum reverse salt flux, and recently
hybrid systems to alleviate the salt accumulation in bioreactor.
However, the main critical challenges of FOMBR have not been completely
resolved yet. This paper reviews the design and applications of FOMBR
process in wastewater treatment. Particular focus was given to reverse
salt flux and effects of the system performance; recent developments in
FOMBR applications from beginning till today are reported.
BibTeX:
@article{ISI:000388015400010,
  author = {Eyvaz, Murat and Aslan, Taha and Arslan, Serkan and Yuksel, Ebubekir and Koyuncu, Ismail},
  title = {Recent developments in forward osmosis membrane bioreactors: a comprehensive review},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2016},
  volume = {57},
  number = {59},
  pages = {28610--28645},
  doi = {10.1080/19443994.2016.1193448}
}
Balcik-Canbolat C, Sakar H, Karagunduz A and Keskinler B (2016), "Advanced treatment of biologically treated medium density fiberboard (MDF) wastewater with Fenton and Fenton enhanced hydrodynamic cavitation process", JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. Vol. 91(12), pp. 2935-2941.
Abstract: BACKGROUND: Biological treatment processes are often ineffective for the
treatment of medium density fiberboard (MDF) wastewater due the presence
of non-biodegradable and refractory compounds. Fenton and Fenton
enhanced hydrodynamic cavitation (HC) processes may be cost effective
solutions for the treatment of such wastewater.
RESULTS: Removals of COD, formaldehyde and color by Fenton and Fenton
enhanced HC processes were investigated in this study. The optimum
H2O2/Fe2+ molar ratio at the initial pH of 3 for the optimum COD removal
efficiency was 2.5/1 in 70 min reaction time. Furthermore, faster
removal rates of pollutants were also observed with HC enhanced Fenton
process. The presence of various herbicides and fungicides in the
wastewater were detected by gas chromatography/mass spectrometry
(GC/MS).
CONCLUSIONS: The Fenton enhanced process resulted in faster COD removal
rates than those obtained in Fenton alone. The Fenton enhanced HC
process appears to be a cost-effective alternative for the treatment of
highly toxic and non-biodegradable MDF wastewater. (C) 2016 Society of
Chemical Industry
BibTeX:
@article{ISI:000388900200003,
  author = {Balcik-Canbolat, Cigdem and Sakar, Hacer and Karagunduz, Ahmet and Keskinler, Bulent},
  title = {Advanced treatment of biologically treated medium density fiberboard (MDF) wastewater with Fenton and Fenton enhanced hydrodynamic cavitation process},
  journal = {JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY},
  year = {2016},
  volume = {91},
  number = {12},
  pages = {2935--2941},
  doi = {10.1002/jctb.4909}
}
Celebi EE and Oncel MS (2016), "Determination of acid forming potential of massive sulfide minerals and the tailings situated in lead/zinc mining district of Balya (NW Turkey)", JOURNAL OF AFRICAN EARTH SCIENCES. Vol. 124, pp. 487-496.
Abstract: Weathering of sulfide minerals is a major source of acid production in
nature and especially in mining territories. Pyrite is not the only
principal mineral that generates acid drainage: other sulfide minerals
(sphalerite, galena, chalcopyrite, etc.) may also be responsible for
acid production. In addition to massive sulfide minerals,
sulfide-bearing mine tailings may also produce acid drainage due to
oxidation and hydrolysis reactions in waste dumps. The lead/zinc (Pb/Zn)
mining region in Balya and Balikesir, in Turkey, has operated mines
intensively since the 1860s; so that characterization of the sulfide
minerals and tailings situated and formed around the mining site is of
great importance to secure a sustainable environment. For this purpose,
acid production and neutralization potentials of massive sulfide ores of
the region, and in the Pb/Zn process facility mine tailings from ten
different points of tailings dam, have been determined by applied
conventional Acid-Base Accounting (ABA) and Net Acid Generation (NAG)
static tests after chemical and mineralogical analysis. The NAG pH and
net acid production potential (NAPP) values were compared on a chart in
order to classify the samples as either acid generating or non-acid
generating. According to the comparisons, the sulfide minerals were
classified as potentially acid forming (PAF). Massive pyrite had the
highest NAPP and NAG pH value of 1966.6 kg H2SO4/ton and 1.91,
respectively and the galena had the lowest NAPP value of 558.9 kg
H2SO4/ton. However, the sphalerite NAG leachate pH value of 430 was the
highest in sulfide minerals so that the sphalerite plotted near the
uncertainty reference border in the PAF zone. In the mine tailings, NAPP
values of 105.9 kg H2SO4/ton on average and the NAG pH values of over
7.5 were determined. In addition to these tests, water leaching
(agitation test) was carried out on tailings in order to generate more
information. The tailings did not generate acidic leachates as they lie
on limestone bed rock which neutralized the acidity. (C) 2016 Elsevier
Ltd. All rights reserved.
BibTeX:
@article{ISI:000389388700034,
  author = {Celebi, E Ender and Oncel, M Salim},
  title = {Determination of acid forming potential of massive sulfide minerals and the tailings situated in lead/zinc mining district of Balya (NW Turkey)},
  journal = {JOURNAL OF AFRICAN EARTH SCIENCES},
  year = {2016},
  volume = {124},
  pages = {487--496},
  doi = {10.1016/j.jafrearsci.2016.09.014}
}
Oral ZBB (2016), "Application of mixed self-assembled monolayers (Mixed SAMs) for nucleic acid detection", MEASUREMENT. Vol. 94, pp. 1-4.
Abstract: Mixed self-assembled monolayers (Mixed SAMs) consisting of
8-Ferrocenyl-1-octanethiol and 6-Mercapto1-hexanol (FcOT:MCH) with probe
PNA on gold electrodes were fabricated by using two-step after the
optimization of immobilization temperature of FcOT:MCH SAMs. Using AC
voltammetry, a novel nucleic acid detection platform, with mixed SAMs,
was proposed. A negative formal potential shift was observed after
complementary ssDNA hybridization while there was no significant
difference after non complementary ssDNA hybridization. Compatible
results were obtained with the measurement of formal potential
differences between mixed SAMs and target DNA (complementary and
non-complementary DNA) in different target DNA concentrations. The
formal potential difference between mixed SAMs immobilization and
complementary ssDNA hybridization was measured in different ionic
strength concentrations. (C) 2016 Elsevier Ltd. All rights reserved.
BibTeX:
@article{ISI:000390512100001,
  author = {Oral, Zehra Banu Bahsi},
  title = {Application of mixed self-assembled monolayers (Mixed SAMs) for nucleic acid detection},
  journal = {MEASUREMENT},
  year = {2016},
  volume = {94},
  pages = {1--4},
  doi = {10.1016/j.measurement.2016.07.060}
}
Soydemir G, Keris-Sen UD, Sen U and Gurol MD (2016), "Biodiesel production potential of mixed microalgal culture grown in domestic wastewater", Bioprocess and Biosystems Engineering. Vol. 39(1), pp. 45-51.
Abstract: textcopyright 2015 Springer-Verlag Berlin Heidelberg In this study, a mixed microalgal culture grown in secondarily treated domestic wastewater effluent was investigated for biodiesel production using in situ transesterification method with conventional heating. The total lipid content of the mixed culture was found as 26.2 % ± 0.6 by weight of dry biomass, and 74 % of the lipids were contributed by total glycerides. In situ transesterification with conventional heating process under acidic conditions produced higher biodiesel yield with chloroform as the co-solvent (82.1 % ± 3.9) compared to hexane (55.3 % ± 3.9) under the same reaction conditions. The gas chromatography analysis showed that FAME composition was mainly composed of palmitic, palmitoleic, stearic, oleic, linoleic and linolenic acid methyl esters., and thus the mixed microalgal culture fed by domestic wastewaters has had comparable biodiesel conversion yields and FAME composition to mono-culture and pure cultures fed by synthetic culture media. Hence, this study showed that secondarily treated domestic wastewater could potentially be a suitable and sustainable medium for microalgae grown to be used as biodiesel feedstock.
BibTeX:
@article{Soydemir2016,
  author = {Soydemir, Gulfem and Keris-Sen, Ulker Diler and Sen, Unal and Gurol, Mirat D.},
  title = {Biodiesel production potential of mixed microalgal culture grown in domestic wastewater},
  journal = {Bioprocess and Biosystems Engineering},
  year = {2016},
  volume = {39},
  number = {1},
  pages = {45--51},
  doi = {10.1007/s00449-015-1487-3}
}
Turkay O, Inan H and Dimoglo A (2015), "Experimental study of humic acid degradation and theoretical modelling of catalytic ozonation", ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH. Vol. 22(1), pp. 202-210.
Abstract: The efficiency of TiO2 as a catalyst in the ozonation of humic acid (HA)
was evaluated in a comprehensive manner. Ozonation, catalytic ozonation
and adsorption experiments were conducted using both synthetic HA
solution and natural water. HA degradation was evaluated in terms of
DOC, VIS400 and UV254. It was shown that the addition of catalyst
positively affects the mechanism of ozonation. An increase in HA
degradation was observed for all these parameters. The impact of
catalyst dose and initial pH value of HA on the efficacy of catalytic
ozonation was investigated. The highest removal efficiencies were
achieved with the dose of 1 g l(-1) of TiO2 (Degussa P-25) and in the
acidic pH region. The catalytic ozonation process was efficient also on
natural water component although not at the same level as it was on
synthetic water. The adsorptive feature of P-25 was considered to have a
clear evidence of the catalytic ozonation mechanism. The mechanism of
catalysis on the surface of metal oxides was elucidated with the help of
quantum-chemical calculations. In the framework of Density Function
Theory (DFT), the O-3 decomposition was calculated in the catalytic and
non-catalytic processes. Donor-acceptor properties of the frontier
(highest occupied and lowest unoccupied molecular orbitals, HOMO/LUMO)
orbitals are discussed. Electron density distribution and reaction
mechanism of superoxide particles formation, which participate in the
process of HA ozonation are analyzed.
BibTeX:
@article{ISI:000347407200012,
  author = {Turkay, Ozge and Inan, Hatice and Dimoglo, Anatoli},
  title = {Experimental study of humic acid degradation and theoretical modelling of catalytic ozonation},
  journal = {ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH},
  year = {2015},
  volume = {22},
  number = {1},
  pages = {202--210},
  doi = {10.1007/s11356-014-3326-5}
}
Barisci S, Ulu F, Sillanpaa M and Dimoglo A (2015), "Evaluation of flurbiprofen removal from aqueous solution by electrosynthesized ferrate(VI) ion and electrocoagulation process", CHEMICAL ENGINEERING JOURNAL. Vol. 262, pp. 1218-1225.
Abstract: The removal of flurbiprofen (FLU) by electrosynthesized ferrate(VI) ion
and electrocoagulation (EC) process was investigated. The degradation of
FLU by ferrate(VI) was affected by pH, applied ferrate(VI) dose and
initial drug concentration. Complete removal of FLU was achieved at pH 4
and applied ferrate(VI) dose was 1/1 in volume ratio for its initial
concentration of 1 mg/L. Removal decreased with increasing pH.
Increasing the ferrate(VI) dose increased the efficiency, but there was
no significant difference between 3/1 and 1/1 (v/v) ferrate(VI) doses
for FLU removal. The effect of current density and pH for the removal of
FLU by EC process were investigated. The optimum conditions were current
density of 2.5 mA/cm(2) and the solution pH of 6.5. Basic condition (pH
9) showed poor removal efficiency by EC process. Equilibrium
concentration was reached within 20 min. TOC removal trends were also
investigated for both process. While oxidation was the main mechanism
for the removal of FLU by ferrate(VI), charge neutralization was the
main removal mechanism by EC process. (C) 2014 Elsevier B.V. All rights
reserved.
BibTeX:
@article{ISI:000347577700134,
  author = {Barisci, Sibel and Ulu, Feride and Sillanpaa, Mika and Dimoglo, Anatholy},
  title = {Evaluation of flurbiprofen removal from aqueous solution by electrosynthesized ferrate(VI) ion and electrocoagulation process},
  journal = {CHEMICAL ENGINEERING JOURNAL},
  year = {2015},
  volume = {262},
  pages = {1218--1225},
  doi = {10.1016/j.cej.2014.10.083}
}
Gulcan HO, Unlu S, Dimoglo A, Sahin Y, Esiringu I, Ercetin T, Oz D and Sahin MF (2015), "Marginally Designed New Profen Analogues Have the Potential to Inhibit Cyclooxygenase Enzymes", ARCHIV DER PHARMAZIE. Vol. 348(1), pp. 55-61.
Abstract: The current structure-activity relationship of profens (i.e.,
2-arylpropionic acid derivatives, a class of non-steroidal
anti-inflammatory drugs) discusses the importance of alpha-monomethyl
substitution on these compounds, since the activities obtained through
their corresponding arylacetic acid derivatives (i.e.,
alpha-demethylated derivatives) or alpha,alpha-dimethyl-substituted
compounds are less than what is observed for the parent profens.
Unfortunately, this implies a generalization in structure-activity
relationships of profens in such a way that a mono-(non-methyl)alkyl
group or dialkyl substituent replaced at the alpha-position of a profen
analogue results in abolished activity. Therefore, within this study, we
aimed to question this generalization employing ibuprofen, flurbiprofen,
and naproxen as model compounds. A series of alpha-(non-methyl)
alkyl-substituted ibuprofen and flurbiprofen analogues as well as alpha,
alpha-dialkyl-substituted ibuprofen, flurbiprofen, and naproxen
derivatives were synthesized and screened for their potential to inhibit
cyclooxygenase enzymes. In addition, since profens have negligible
potential to inhibit lipoxygenase enzymes, the effect of such
derivatization was also questioned in lipoxygenase inhibition assays.
The findings only partially agreed with the current structure-activity
approach of profens and the activity results of some compounds were
found as beyond ordinary.
BibTeX:
@article{ISI:000347710600007,
  author = {Gulcan, Hayrettin O and Unlu, Serdar and Dimoglo, Anatoli and Sahin, Yasemin and Esiringu, Ilker and Ercetin, Tuba and Oz, Demet and Sahin, Mustafa F},
  title = {Marginally Designed New Profen Analogues Have the Potential to Inhibit Cyclooxygenase Enzymes},
  journal = {ARCHIV DER PHARMAZIE},
  year = {2015},
  volume = {348},
  number = {1},
  pages = {55--61},
  doi = {10.1002/ardp.201400366}
}
Oguz E, Keskinler B and Celik C (2015), "Investigation on the Removal of COD from Colored Aqueous Solutions with O-3, H2O2, HCO3-, and PAC", OZONE-SCIENCE & ENGINEERING. Vol. 37(1), pp. 62-70.
Abstract: In this study, chemical oxygen demand (COD) was removed using different
processes containing O-3, H2O2, HCO3-, and powder activated carbon (PAC)
from the synthetic dye solutions. The effects of the experimental
parameters such as temperature, ozone dose, dye concentration, pH, and
time on the removal of COD were investigated. The Taguchi method was
applied to determine the optimum conditions. An orthogonal array L-18
(2(1) * 3(7)) experimental design plan was selected to define the
optimum conditions. In addition, the mechanism of the COD removal was
explained on the basis of the results of Fourier transform infrared
(FTIR) spectroscopy. To gain information about COD removal mechanism at
various pHs, electrophoretic mobilities of particles were measured. The
chosen experimental parameters and their ranges are:
[GRAPHICS]
(0-39 mM); temperature (18-70 degrees C); ozone dose (164-492 mg/min);
dye concentration (200-600 ppm); PAC (0-1.5 g); H2O2 (0-0.056 mM); pH
(3-12); and time (10-30 min). Under these optimum conditions, it was
found that the COD removal efficiency from the synthetic dye solutions
was 98%.
BibTeX:
@article{ISI:000348727800001,
  author = {Oguz, Ensar and Keskinler, Bulent and Celik, Cafer},
  title = {Investigation on the Removal of COD from Colored Aqueous Solutions with O-3, H2O2, HCO3-, and PAC},
  journal = {OZONE-SCIENCE & ENGINEERING},
  year = {2015},
  volume = {37},
  number = {1},
  pages = {62--70},
  doi = {10.1080/01919512.2014.911076}
}
Kandemirli F, Vurdu CD, Basaran MA, Sayiner HS, Shvets N, Dimoglo A, Kovalish V and Polat T (2015), "Electronic-Topological and Neural Network Approaches to the Structure-Antimycobacterial Activity Relationships Study on Hydrazones Derivatives", MEDICINAL CHEMISTRY. Vol. 11(1), pp. 77-85.
Abstract: That the implementation of Electronic-Topological Method and a variant
of Feed Forward Neural Network (FFNN) called as the Associative Neural
Network are applied to the compounds of Hydrazones derivatives have been
employed in order to construct model which can be used in the prediction
of antituberculosis activity. The supervised learning has been performed
using (ASNN) and categorized correctly 84.4% of them, namely, 38 out of
45. Ph1 pharmacophore and Ph2 pharmacophore consisting of 6 and 7 atoms,
respectively were found. Anti-pharmacophore features so-called ``break
of activity'' have also been revealed, which means that APh1 is found
in 22 inactive molecules. Statistical analyses have been carried out by
using the descriptors, such as E-HOMO, E-LUMO, Delta E, hardness,
softness, chemical potential, electrophilicity index, exact
polarizibility, total of electronic and zero point energies, dipole
moment as independent variables in order to account for the dependent
variable called inhibition efficiency. Observing several complexities,
namely, linearity, nonlinearity and multi-co linearity at the same time
leads data to be modeled using two different techniques called multiple
regression and Artificial Neural Networks (ANNs) after computing
correlations among descriptors in order to compute QSAR. Computations
resulting in determining some compounds with relatively high values of
inhibition are presented.
BibTeX:
@article{ISI:000349330100010,
  author = {Kandemirli, Fatma and Vurdu, Can Dogan and Basaran, Murat Alper and Sayiner, Hakan Sezgin and Shvets, Nathaly and Dimoglo, Anatholy and Kovalish, Vasyl and Polat, Turgay},
  title = {Electronic-Topological and Neural Network Approaches to the Structure-Antimycobacterial Activity Relationships Study on Hydrazones Derivatives},
  journal = {MEDICINAL CHEMISTRY},
  year = {2015},
  volume = {11},
  number = {1},
  pages = {77--85}
}
Aydiner C (2015), "A model-based analysis of water transport dynamics and fouling behaviors of osmotic membrane", CHEMICAL ENGINEERING JOURNAL. Vol. 266, pp. 289-298.
Abstract: Water transport performance of forward osmosis (FO) has a crucial
significance for successful implementations of the process in water and
wastewater reclamation and seawater desalination. But, ascertainment of
membrane fouling dynamics associated with simultaneous solute and water
transfer still remains as one of the main research subjects for FO's
technological development. This study provides a deep insight to reveal
the relations between water transport and membrane fouling propensities
in FO by which model-based analysis was performed based on a novel
osmotic resistance-in-series model developed for normal and reverse
membrane orientations. Model results indicated that for the membrane
operated with real seawater, osmotic water flux was mainly dependent on
the active layer resistance regardless of orientation mode and osmosis
time. Interfacial layer from effective draw interface by active
layer/draw bulk interface, [d(w) - m(a)/d(b)] seemed to be the main
performance-limiting domain in which, as interfacial fouling increased,
membrane permeated less water to draw. Predominant mechanisms were
designated as homogeneous fouling of equivalent solute distributions and
heterogeneous fouling of non-uniform nano-exclusion zones in normal and
reverse modes, respectively. More interestingly, it was comprehended for
reverse mode that the nature of nano-exclusion zones at the interface
turned to a feature of uniform solute distributions at the interface
m(a)/d(b). Very good agreements were found between experimental fluxes
and theoretical results based on dimensional and dimensionless
structural parameter and total resistances. After all, distinctive
fouling behaviors clarified upon the adopted dynamics of transport were
strongly verified by consistencies of high accuracy in the model
estimations. (C) 2015 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000350931600033,
  author = {Aydiner, Coskun},
  title = {A model-based analysis of water transport dynamics and fouling behaviors of osmotic membrane},
  journal = {CHEMICAL ENGINEERING JOURNAL},
  year = {2015},
  volume = {266},
  pages = {289--298},
  doi = {10.1016/j.cej.2014.12.098}
}
Dogan HM, Kilic OM, Yilmaz DS, Buhan E, Polat F and Buhan SD (2015), "INTEGRATION OF GIS AND REMOTE SENSING WITH THE USLE MODEL IN THE ASSESSMENT OF ANNUAL SOIL LOSS AND SEDIMENT INPUT OF ZINAV LAKE BASIN IN TURKEY", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 24(1A), pp. 172-179.
Abstract: The effects of annual soil loss on Zinav Lake Basin located in Tokat
Province of Turkey were researched. The annual soil loss of the study
area was modelled and mapped by using the Universal Soil Loss Equation
(USLE), Geographic Information Systems (GIS) and remote sensing (RS).
Employing the USLE model, precipitation (R), the degree of slope and
length of slope (L and S), soil erodibility (K), vegetation cover-land
use (C), and soil conservation (P) factors were separately calculated
and transformed to raster maps in GIS environment. Then, all produced
factor map layers were multiplied each other to develop an annual soil
loss raster map. Annual sediment input was calculated by utilizing Roehl
sediment delivery ratio and developed annual soil loss raster map. The
mean annual soil loss of the study area was determined as 0.037 t.ha(-1)
year(-1). Erosion risk classes of the study area were determined
according to European Environment Information and Observation Network
for Soil (EIO-NET-SOIL) Erosion Map, and summarized as five classes
including the 0-0.5, 0.5-1.0, 1.0-2.0, 2.0-5.0 and 5.0-7.1
tha(-1)year(-1) I intervals. Sediment delivery ratio and mean annual
sediment input were determined as 44.67% and 0.181 tha(-1)year(-1),
respectively.
BibTeX:
@article{ISI:000351332400003,
  author = {Dogan, Hakan Mete and Kilic, Orhan Mete and Yilmaz, Dogac Sencer and Buhan, Ekrem and Polat, Fatih and Buhan, Saliha Dirim},
  title = {INTEGRATION OF GIS AND REMOTE SENSING WITH THE USLE MODEL IN THE ASSESSMENT OF ANNUAL SOIL LOSS AND SEDIMENT INPUT OF ZINAV LAKE BASIN IN TURKEY},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2015},
  volume = {24},
  number = {1A},
  pages = {172--179}
}
Polat F, Dogan HM, Buhan E, Kilic OM, Yilmaz DS and Buhan SD (2015), "ACCUMULATION AND BEHAVIOR OF SOME HEAVY METALS IN THE MAIN COMPONENTS OF ZINAV LAKE BASIN ECOSYSTEM", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 24(1A), pp. 180-187.
Abstract: Effects of Pb, Cu, Zn, Fe, Co, Al, and Cd on the ecosystem of Zinav Lake
Basin in Turkey were investigated between 2011 and 2013. The ecosystem
was handled in seven main components including fish, macrophyte,
sediment, water, benthos, plankton, and soil. Heavy metal contents of
the main components were determined by using Inductively Coupled
Plasma-Mass Spectrometer (ICP-MS) and field samples. Relationships among
the heavy metal contents of ecosystem components were investigated by
using correlation (Pearson) analysis. Hierarchical Clustering Analysis
(RCA) was applied to delineate the similar subgroups of ecosystem
components according to their heavy metal contents. Fe, Al and Zn were
found maximum and Cd was found minimum in almost all ecosystem
components except plankton. The accumulation order of heavy metal levels
was found as soil textgreater sediment textgreater macrophyte textgreater fish = benthos textgreater water textgreater
plankton (except Fe). Al, Co, Cu, Fe, and Zn behave similar in the
ecosystem. However, Pb and Cd did not show any similarities neither to
each other nor to the others.
BibTeX:
@article{ISI:000351332400004,
  author = {Polat, Fatih and Dogan, Hakan Mete and Buhan, Ekrem and Kilic, Orhan Mete and Yilmaz, Dogac Sencer and Buhan, Saliha Dirim},
  title = {ACCUMULATION AND BEHAVIOR OF SOME HEAVY METALS IN THE MAIN COMPONENTS OF ZINAV LAKE BASIN ECOSYSTEM},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2015},
  volume = {24},
  number = {1A},
  pages = {180--187}
}
Buhan SD, Bektas N, Kocer MAT, Dogan HM, Buhan E and Polat F (2015), "TROPHIC STATUS AND THREATS IN ZINAV LAKE (TOKAT/TURKEY)", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 24(1A), pp. 203-207.
Abstract: This study was conducted to determine water quality and trophic state of
Zinav Lake, which is located in the Central Black Sea Region of Turkey.
Temperature, dissolved oxygen, pH, electrical conductivity, total
suspended solids, Secchi disc transparency, ammonia, nitrite, nitrate,
total nitrogen, soluble reactive phosphorus, total phosphorus and
chlorophyll a were monitored in water column from January 2012 to June
2013. The study showed that Zinav Lake was a dimictic lake, which
circulated in spring and fall, and thermally stratified in summer.
Hypo-limnetic oxygen deficit and metalimnetic oxygen minima were the
cases. Vertical distribution of dissolved oxygen and pH and ammonia
accumulation in hypolimnion represented eutrophic/hypereutrophic
conditions. The values and ratios of nutrients and chlorophyll a and
Secchi disc transparency clearly classified Zinav Lake as
eutrophic/hypereutrophic. Allochthonous loadings of organic matter and
nutrients from the catchment and the changes in hydrological cycle by a
power plant seem to be the most threatening factors controlling the
water quality and trophic state in Zinav Lake.
BibTeX:
@article{ISI:000351332400007,
  author = {Buhan, Saliha Dirim and Bektas, Nihal and Kocer, Mehmet Ali T and Dogan, Hakan Mete and Buhan, Ekrem and Polat, Fatih},
  title = {TROPHIC STATUS AND THREATS IN ZINAV LAKE (TOKAT/TURKEY)},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2015},
  volume = {24},
  number = {1A},
  pages = {203--207}
}
Ulu F, Barisci S, Kobya M and Sillanpaa M (2015), "An evaluation on different origins of natural organic matters using various anodes by electrocoagulation", CHEMOSPHERE. Vol. 125, pp. 108-114.
Abstract: In this investigation, natural organic matters (NOM) of different
origins (commercial, terrestrial and natural water) were treated by
electrocoagulation (EC) process using aluminum, iron and hybrid
electrodes. Electrode type effect on removal efficiency was observed for
each NOM (commercial, terrestrial, and natural). The results were
presented as dissolved organic carbon (DOC) (mg L-1) and UV/VIS
absorbance (cm(-1)). The specific UV absorbance (SUVA) was determined
before and after treatment of water. The lowest effluent concentration
was obtained as 5.05 mg L-1 with hybrid electrode for natural NOM source
at its original pH 7.3. In addition, among the metal types, the best
UV-abs-254 removal efficiency was obtained as 92.4% with 0.0312 cm(-1)
by hybrid electrode at the end of the process. The color removal
efficiency of water occurred successfully by Al and hybrid electrodes.
Aquatic NOM source was the most resistant to EC treatment with DOC
reduction of 71.1%, 59.8%, and 68.6% for Al, Fe and hybrid
electrodes, respectively. Zeta potential and floc size of colloids were
observed during the process for the determination of destabilization
level of natural organic matters in EC process. Fast coagulation or
flocculation and incipient instability were formed during electrolysis
time for Al and Fe electrode, respectively. SUVA value was reduced to
below 2 for three NOM sources studied. The EC process was shown to be a
viable for different NOM sources with various metals. (C) 2014 Elsevier
Ltd. All rights reserved.
BibTeX:
@article{ISI:000351646800014,
  author = {Ulu, Feride and Barisci, Sibel and Kobya, Mehmet and Sillanpaa, Mika},
  title = {An evaluation on different origins of natural organic matters using various anodes by electrocoagulation},
  journal = {CHEMOSPHERE},
  year = {2015},
  volume = {125},
  pages = {108--114},
  doi = {10.1016/j.chemosphere.2014.11.063}
}
Simsek H, Kobya M, Khan E and Bezbaruah AN (2015), "Removal of aqueous cyanide with strongly basic ion-exchange resin", ENVIRONMENTAL TECHNOLOGY. Vol. 36(13), pp. 1612-1622.
Abstract: The removal of cyanide (CN-) from aqueous solutions using a strongly
basic ion-exchange resin, Purolite A-250, was investigated. The effects
of contact time, initial CN- concentration, pH, temperature, resin
dosage, agitation speed, and particle size distribution on the removal
of CN- were examined. The adsorption equilibrium data fitted the
Langmuir isotherm very well. The maximum CN- adsorption capacity of
Purolite A-250 was found to be 44 mg CN- g(-1) resin. More than 90% CN-
adsorption was achieved for most CN- solutions (50, 100, and 200 mg CN-
L-1) with a resin dose of 2 g L-1. The equilibrium time was similar to
20 min, optimum pH was 10.0-10.5, and optimum agitation speed was 150
rpm. An increase in adsorption of CN- with increasing resin dosage was
observed. Adsorption of CN- by the resin was marginally affected
(maximum 4% variation) within an environmentally relevant temperature
range of 20-50 degrees C. Fixed-bed column (20.5 mm internal diameters)
experiments were performed to investigate the effects of resin bed depth
and influent flow rate on breakthrough behaviour. Breakthrough occurred
in 5 min for 0.60 cm bed depth while it was 340 min for 5.40 cm bed
depth. Adsorption capacity was 25.5 mg CN- g(-1) for 5 mL min(-1) flow
rate and 3.9 mg CN- g(-1) for 20 mL min(-1) flow rate. The research has
established that the resin can be effectively used for CN- removal from
aqueous solutions.
BibTeX:
@article{ISI:000351845000002,
  author = {Simsek, Halis and Kobya, Mehmet and Khan, Eakalak and Bezbaruah, Achintya N},
  title = {Removal of aqueous cyanide with strongly basic ion-exchange resin},
  journal = {ENVIRONMENTAL TECHNOLOGY},
  year = {2015},
  volume = {36},
  number = {13},
  pages = {1612--1622},
  doi = {10.1080/09593330.2014.999829}
}
Ozturk N, Ergenekon P, Seckin GO and Bayir S (2015), "Spatial Distribution and Temporal Trends of VOCs in a Highly Industrialized Town in Turkey", BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY., may, 2015. Vol. 94(5), pp. 653-660.
Abstract: An extensive monitoring study of volatile organic compounds (VOCs) was
conducted at sites across the highly industrialized town of Dilovasi,
northern Turkey to determine temporal and spatial trends in pollutant
concentrations and relate to the effects of source locations,
meteorology, and topography. Two-week passive samplers (Tenax tubes)
were deployed at twelve sites from February to December 2012 and
analysed using thermal desorption and gas chromatography with mass
spectrometric detection (TD-GC-MS). Sampled total VOC (TVOC) levels were
highest in the July through October period and were highest at
low-altitude sites near industry facilities and vehicle traffic sources
(148.3 A mu g/m(3) at site 11, 154.1 A mu g/m(3) at site 10) and lowest
at high-altitude sites located furthest upwind from industry and traffic
sources (78.4 A mu g/m(3) at site 5 and 78.5 A mu g/m(3) at site 6).
Analysis of ``T/B'' ratios suggested that contributions to ambient VOC
in Dilovasi are dominated by the town's industrial sources.
Meteorological conditions and the town's basin topography were also
found to significantly influence the city's air quality, with strong
winds from the NE observed to correlate with periods of higher sampled
TVOC. Compared with other industrialized urban centers, the study
revealed that there is significant toluene pollution in Dilovasi and
recommended enhanced continuous monitoring at the city's industrial and
residential zones.
BibTeX:
@article{ISI:000352614400019,
  author = {Ozturk, Naciye and Ergenekon, Pinar and Seckin, Gaye Ozdemir and Bayir, Sumeyra},
  title = {Spatial Distribution and Temporal Trends of VOCs in a Highly Industrialized Town in Turkey},
  journal = {BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY},
  year = {2015},
  volume = {94},
  number = {5},
  pages = {653--660},
  doi = {10.1007/s00128-015-1506-8}
}
Ucler N, Engin GO, Kocken HG and Oncel MS (2015), "Game theory and fuzzy programming approaches for bi-objective optimization of reservoir watershed management: a case study in Namazgah reservoir", ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH., may, 2015. Vol. 22(9), pp. 6546-6558.
Abstract: In this study, game theory and fuzzy programming approaches were used to
balance economic and environmental impacts in the Namazgah reservoir,
Turkey. The main goals identified were to maximize economic benefits of
land use and to protect water quality of reservoir and land resources.
Total phosphorous load (kg ha(-1) year(-1)) and economic income (USD
ha(-1) year(-1)) from land use were determined as environmental value
and economic value, respectively. The surface area of existing land use
types, which are grouped under 10 headings according to the
investigations on the watershed area, and the constraint values for the
watershed were calculated using aerial photos, master plans, and basin
slope map. The results of fuzzy programming approach were found to be
very close to the results of the game theory model. It was concluded
that the amount of fertilizer used in the current situation presents a
danger to the reservoir and, therefore, unnecessary fertilizer use
should be prevented. Additionally, nuts, fruit, and vegetable
cultivation, instead of wheat and corn cultivation, was found to be more
suitable due to their high economic income and low total phosphorus (TP)
load. Apart from agricultural activities, livestock farming should also
be considered in the area as a second source of income. It is believed
that the results obtained in this study will help decision makers to
identify possible problems of the watershed.
BibTeX:
@article{ISI:000353046600015,
  author = {Ucler, N and Engin, G Onkal and Kocken, H G and Oncel, M S},
  title = {Game theory and fuzzy programming approaches for bi-objective optimization of reservoir watershed management: a case study in Namazgah reservoir},
  journal = {ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH},
  year = {2015},
  volume = {22},
  number = {9},
  pages = {6546--6558},
  doi = {10.1007/s11356-015-4181-8}
}
Barlik N, Keskinler B, Kocakerim MM and Akay G (2015), "Surface modification of monolithic PolyHIPE Polymers for anionic functionality and their ion exchange behavior", JOURNAL OF APPLIED POLYMER SCIENCE. Vol. 132(29)
Abstract: Monolithic PolyHIPE Polymer (PHP), being a highly porous, low density,
open cellular material was produced by polymerization of a high internal
phase emulsion (HIPE) in which the polymerizable continuous phase
consisted of monomers, styrene (STY), and divinyl benzene (DVB). The
inner dispersed phase (90 vol %) was an aqueous solution containing 0.4
wt % potassium persulphate as initiator. The resulting porous structure
had 12% crosslinking density. Surface chemistry of the monoliths was
modified by chloromethylation and amination to impart anionic
functionality. Surface modified monoliths had ion exchange capacity of
3.01 meq/g, and had the ability to uptake water about 10 times of its
mass. It was used Cr (VI) ion removal from aqueous solution. The
experimental results investigated for both the Langmuir and the
Dubinin-Radushkevich adsorption models. The maximum Cr (VI) adsorptions
are 126.6 mg Cr (VI)/g and 129.3 mg Cr (VI)/g, respectively. The mean
free energy E of adsorption is 11.18 kJ/mol according to the
Dubinin-Radushkevich adsorption model, indicating that the adsorption
occurs through a chemical ion-exchange process and it is not diffusion
limited. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015,
132, 42286.
BibTeX:
@article{ISI:000353976700020,
  author = {Barlik, Necla and Keskinler, Bulent and Kocakerim, M Muhtar and Akay, Galip},
  title = {Surface modification of monolithic PolyHIPE Polymers for anionic functionality and their ion exchange behavior},
  journal = {JOURNAL OF APPLIED POLYMER SCIENCE},
  year = {2015},
  volume = {132},
  number = {29},
  doi = {10.1002/app.42286}
}
Karagunduz A, Young MH and Pennell KD (2015), "Influence of surfactants on unsaturated water flow and solute transport", WATER RESOURCES RESEARCH. Vol. 51(4), pp. 1977-1988.
Abstract: Surfactants can reduce soil water retention by changing the surface
tension of water and the contact angle between the liquid and solid
phases. As a result, water flow and solute transport in unsaturated soil
may be altered in the presence of surfactants. In this study, the
effects of a representative nonionic surfactant, Triton X-100, on
coupled water flow and nonreactive solute transport during unsaturated
flow conditions were evaluated. Batch reactor experiments were conducted
to measure the surfactant sorption characteristics, while unsaturated
transport experiments were performed in columns packed with 40-270 mesh
Ottawa sand at five initial water contents. Following the introduction
of surfactant solution, the rate of water percolation through the sand
increased; however, this period of rapid water drainage was followed by
decreased water percolation due to the reduction in soil water content
and the corresponding decrease in unsaturated hydraulic conductivity
behind the surfactant front. The observed changes in water percolation
occurred sequentially, and resulted in faster nonreactive solute
transport than was observed in the absence of surfactant. A
one-dimensional mathematical model accurately described coupled water
flow, surfactant, and solute transport under most experimental
conditions. Differences between model predictions and experimental data
were observed in the column study performed at the lowest water content
(0.115 cm(3)/cm(3)), which was attributed to surfactant adsorption at
the air-water interface. These findings demonstrate the potential
influence of surfactants additives on unsaturated water flow and solute
transport in soils, and demonstrate a methodology to couple these
processes in a predictive modeling tool.
BibTeX:
@article{ISI:000354733500006,
  author = {Karagunduz, Ahmet and Young, Michael H and Pennell, Kurt D},
  title = {Influence of surfactants on unsaturated water flow and solute transport},
  journal = {WATER RESOURCES RESEARCH},
  year = {2015},
  volume = {51},
  number = {4},
  pages = {1977--1988},
  doi = {10.1002/2014WR015845}
}
Kocakusakoglu A, Daglar M, Konyar M, Yatmaz HC and Ozturk K (2015), "Photocatalytic activity of reticulated ZnO porous ceramics in degradation of azo dye molecules", JOURNAL OF THE EUROPEAN CERAMIC SOCIETY. Vol. 35(10), pp. 2845-2853.
Abstract: Reticulated ZnO ceramics with an open cell three-dimensional network
structure were processed in the present study by polymer sponge
replication method. The fabricated highly porous ceramics were used as
catalysts in ultraviolet (UV) light-assisted degradation of an azo dye
(Reactive Red 180 (RR180)). Decolorization of a model 50 mg/L aqueous
solution of RR180 and removal of its by-products (total organic carbon
(TOC) efficiencies) were significantly improved by this reticulated ZnO
structure as compared with those of ``solid'' plate-shaped catalysts
produced by tape casting method for our previous investigations. After
180 min total processing time for the 500 mL solution under UVC
irradiation and for the same amount of catalyst (11 g), the performances
of 82.6% and 48.0% for color removal and 18.3% and 5.5% for TOC
removal were reached in the presence of the reticulated and the
plate-shaped ZnO catalysts, respectively. (C) 2015 Elsevier Ltd. All
rights reserved.
BibTeX:
@article{ISI:000355353800015,
  author = {Kocakusakoglu, Alphan and Daglar, Memnune and Konyar, Mehmet and Yatmaz, H Cengiz and Ozturk, Koray},
  title = {Photocatalytic activity of reticulated ZnO porous ceramics in degradation of azo dye molecules},
  journal = {JOURNAL OF THE EUROPEAN CERAMIC SOCIETY},
  year = {2015},
  volume = {35},
  number = {10},
  pages = {2845--2853},
  doi = {10.1016/j.jeurceramsoc.2015.03.042}
}
Oral ZBB (2015), "Evaluation of Refractive Index Variations of TiO2:SiO2:Zr Thin Films by Molar Ratio", ACTA PHYSICA POLONICA A. Vol. 127(4), pp. 1314-1316.
Abstract: Zr-doped and undoped TiO2-SiO2 thin films were fabricated by using
sol-gel dip coating. TiO2:SiO2:Zr films with different molar ratio were
coated on glass substrates. Refractive indexes and the thicknesses of
thin films were measured with Metricon 2010 Prism Coupler. The
theoretical and measured refractive indexes of thin films were found to
be consistently changing with molar ratio. The measured refractive
indexes of thin films were lower than the theoretical ones due to the
porosity of the structure.
BibTeX:
@article{ISI:000357937100127,
  author = {Oral, Z B Bahsi},
  title = {Evaluation of Refractive Index Variations of TiO2:SiO2:Zr Thin Films by Molar Ratio},
  journal = {ACTA PHYSICA POLONICA A},
  year = {2015},
  volume = {127},
  number = {4},
  pages = {1314--1316}
}
Kayahan E, Bahsi ZB, Oral AY and Sezer M (2015), "Porous Silicon Based Sensor for Organic Vapors", ACTA PHYSICA POLONICA A. Vol. 127(4), pp. 1400-1402.
Abstract: Porous silicon (PS) has been an attractive material for enhancing
optical properties of silicon. Its large surface area for sensor
applications and compatibility with silicon-based technologies has been
a driving force for further technology development. In this stud of PS
to sense at room temperature organic vapors such as acetone,
trichloroethylene and hexane, which are harmful to human health, has
been investigated. Electrical (DC) and photo-luminescence (PL)
measurements in a controlled atmosphere (nitrogen gas and an organic
vapor mix) were performed to test the sensor response towards the
organic vapors. It was found that PS surface is very sensitive against
these vapors. if he experimental results also suggested that PS can be
used as a new electro-optical material to sense harmful vapors.
BibTeX:
@article{ISI:000357937100148,
  author = {Kayahan, E and Bahsi, Z B and Oral, A Y and Sezer, M},
  title = {Porous Silicon Based Sensor for Organic Vapors},
  journal = {ACTA PHYSICA POLONICA A},
  year = {2015},
  volume = {127},
  number = {4},
  pages = {1400--1402}
}
Aksakal F, Shvets N and Dimoglo A (2015), "The study of dual COX-2/5-LOX inhibitors by using electronic-topological approach based on data on the ligand-receptor interactions", JOURNAL OF MOLECULAR GRAPHICS & MODELLING. Vol. 60, pp. 79-88.
Abstract: Structural and electronic factors influencing selective inhibition of
cyclooxygenase-2 and 5-lipoxygenase (COX-2/5-LOX) were studied by using
Electronic-Topological Method combined with Neural Networks (ETM-NN),
molecular docking, and Density Functional Theory (DFT) in a large set of
molecules. The results of the ETM-NN calculations allowed for the
selection of pharmacophoric molecular fragments, which could be taken as
a basis for a system capable of predicting the COX-2/5-LOX inhibitory
activity. For the more effective extraction of the pharmacophoric
molecular fragments, docking of molecules into the active sites of the
two enzymes was carried out to get data on the ligand-receptor
interaction. To make an assessment of these interactions, stabilization
energies were calculated by using Natural Bond Orbital (NBO) analysis.
Docking and data on the electronic structures of active sites of enzymes
helped to reveal effectively the peculiarities of the ligand-receptor
binding. The system for the selective COX-2/5-LOX inhibitory activity
prediction that has been developed as the result of the ETM-NN study
recognized correctly 93% of compounds as highly active ones. Thus, this
system can be successfully used for carrying out computer screening and
synthesis of potent inhibitors of COX-2/5-LOX with diverse molecular
skeletons. (C) 2015 Elsevier Inc. All rights reserved.
BibTeX:
@article{ISI:000359174900008,
  author = {Aksakal, Fatma and Shvets, Natali and Dimoglo, Anatholy},
  title = {The study of dual COX-2/5-LOX inhibitors by using electronic-topological approach based on data on the ligand-receptor interactions},
  journal = {JOURNAL OF MOLECULAR GRAPHICS & MODELLING},
  year = {2015},
  volume = {60},
  pages = {79--88},
  doi = {10.1016/j.jmgm.2015.06.006}
}
Ergon-Can T, Erhan E and Algur OF (2015), "Poly(glycidyl methacrylate-co-3-thienylmethylmethacrylate) as an immobilization matrix for microbial glycerol biosensing based on Gluconobacter oxydans", MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS. Vol. 56, pp. 432-437.
Abstract: A commercial strain of Gluconobacter oxydans together with a new
co-polymer Poly(glycidyl methacrylate-co-3thienylmethylmethacrylate)
(Poly(GMA-co-MTM)), which provides effective immobilization in the
continuous flow system, was used in the sensor design. By taking the
advantages of the nano-technology, carbon nanotubes (CNTs) were also
added to the cell film and the sensitivity of the sensor was increased
about 15 times. During the glycerol analysis in the continuous system,
it was shown that composite film was not removed from the electrode
surface and film elements were not washed out from the system. Glycerol
analyses were performed by using batch loaded continuously flow cell at
different flow rates of 1, 2, 4, and 6 mL/min. The linear range was
found as 2-100 mM with the detection limit (LOD) of 0.057 mM according
to S/N = 3. The calibration graphs were obtained for Poly(GMA-co-MTM)/G.
oxydans and Poly(GMA-co-MTM)/CNT/G. oxydans biofilm electrodes in FIA
mode, and sensitivities were found to be 1.50 nA/mM and 19.13 nA/mM,
respectively. In this study, Poly(GMA-co-MTM) was used for the first
time as a microbial matrix and was shown to be an effective
immobilizatipn agent (C) 2015 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000359873900053,
  author = {Ergon-Can, Tulay and Erhan, Elif and Algur, Omer Faruk},
  title = {Poly(glycidyl methacrylate-co-3-thienylmethylmethacrylate) as an immobilization matrix for microbial glycerol biosensing based on Gluconobacter oxydans},
  journal = {MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS},
  year = {2015},
  volume = {56},
  pages = {432--437},
  doi = {10.1016/j.msec.2015.07.006}
}
Odabasi M, Cetin B and Bayram A (2015), "Persistent Organic Pollutants (POPs) on Fine and Coarse Atmospheric Particles Measured at Two (Urban and Industrial) Sites", AEROSOL AND AIR QUALITY RESEARCH. Vol. 15(5), pp. 1894+.
Abstract: Particle size is an important parameter in terms of human health
effects, fate and transport of pollutants associated with particulate
matter (PM). Persistent organic pollutant (POP) (i.e., PAHs, PCBs,
PBDEs, and OCPs) concentrations were measured on fine (d(p) textless 2.5 mu m)
and coarse (2.5 mu m textless d(p) textless 10 mu m) aerosol samples collected at two
(Urban and Industrial) sites in Izmir, Turkey. POP concentrations were
similar to 2 times higher at the Industrial site due to the local
sources (i.e., scrap processing iron-steel plants, ship-breaking
activities, a petroleum refinery, and a petrochemical plant) that were
recently shown to be hot spots emitting these pollutants. The size
distribution of particle-phase POPs indicated that they were mostly (textgreater
50%) associated with fine PM. The larger contribution of all POP
compounds to fine PM could be attributed to the higher sorption capacity
of fine PM because of its relatively higher organic matter content
compared to coarse PM. Fine PM fraction of POPs significantly increased
with octanol-air partition coefficient (K-OA) (p textless 0.01) since larger
K-OA values favor the partitioning of POPs to PM. Relationships between
fine PM percent and meteorological parameters (i.e., temperature and
wind speed) were also investigated. Fine PM percent decreased with
temperature and the correlations were significant for 51% of the
compounds (p textless 0.01), suggesting that the decrease in K-OA with
increasing temperature results in less partitioning to PM. Fine PM
fraction also decreased with wind speed (p textless 0.01 for the 52% of the
compounds) that could be attributed to increased resuspension of
contaminated coarse particles with increasing wind speed. Using the
experimental deposition velocities reported for several POPs in the
study area it was shown that dry particle deposition velocity
significantly decreases with increasing fine PM fraction (p textless 0.01).
This indicates that the increase in fine fraction of POPs with
decreasing volatility may have important implications for their
environmental fate and transport.
BibTeX:
@article{ISI:000361971500017,
  author = {Odabasi, Mustafa and Cetin, Banu and Bayram, Abdurrahman},
  title = {Persistent Organic Pollutants (POPs) on Fine and Coarse Atmospheric Particles Measured at Two (Urban and Industrial) Sites},
  journal = {AEROSOL AND AIR QUALITY RESEARCH},
  year = {2015},
  volume = {15},
  number = {5},
  pages = {1894+},
  doi = {10.4209/aaqr.2015.02.0118}
}
Sik E, Kobya M, Demirbas E, Oncel MS and Goren AY (2015), "Removal of As(V) from groundwater by a new electrocoagulation reactor using Fe ball anodes: optimization of operating parameters", DESALINATION AND WATER TREATMENT. Vol. 56(5), pp. 1177-1190.
Abstract: Removal of As(V) from groundwater by a new air-injected
electrocoagulation (EC) reactor using iron (Fe) ball anodes was
investigated and the operating conditions were optimized. Effects of
operating parameters such as initial pH (pH(i): 6.5-8.5), current (i:
0.1-0.5 A), operating time (t(EC): 1-3min), size of Fe anode ball (d(p):
5-10mm), initial As(V) concentration (C-o: 50-150g/L), air flow rate
(Q(air): 2-10L/min), and column height of Fe ball (h: 2-8cm) in the EC
reactor were evaluated with a three-level factorial design viz.
Box-Behnken statistical experiment design. The model program provided
with responses such as effluent As(V) concentration, removal efficiency,
and operating cost for the EC process. Analysis of variance for all
variables had confirmed the predicted models by the experimental design
within 95% confidence level (R-2: 0.94, adj-R-2: 0.87), which ensured a
satisfactory adjustment of the quadratic model with the experimental
data. The maximum removal efficiency of As(V), minimum operating cost,
and lowest effluent concentration at the optimized conditions (pH(i)
7.2, 0.5 A, 1.2min, 5mm ball size, column height of 4.8cm, and 9.9L/min)
for initial concentration of 100g/L were obtained as 99.2%,
0.031/m(3), and 0.4g/L, respectively.
BibTeX:
@article{ISI:000362845800005,
  author = {Sik, E and Kobya, M and Demirbas, E and Oncel, M S and Goren, A Y},
  title = {Removal of As(V) from groundwater by a new electrocoagulation reactor using Fe ball anodes: optimization of operating parameters},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2015},
  volume = {56},
  number = {5},
  pages = {1177--1190},
  doi = {10.1080/19443994.2014.951691}
}
Kobya M, Erdem N and Demirbas E (2015), "Treatment of Cr, Ni and Zn from galvanic rinsing wastewater by electrocoagulation process using iron electrodes", DESALINATION AND WATER TREATMENT. Vol. 56(5), pp. 1191-1201.
Abstract: Galvanizing plants contain reasonable amounts of heavy metal ions which
pose a serious risk to humans, animals and the environment. In the
present study, removal efficiencies of Cr, Ni and Zn from galvanic rinse
wastewater (GRW) by electrocoagulation (EC) process using iron plate
electrodes were investigated in a laboratory scale EC reactor. The
effects of operational variables, such as operating time (0-50min),
current density (10-40A/m(2)), initial pH(i) (2.4-6.4) and electrode
connection modes (MP-P: monopolar-parallel, MP-S: monopolar-serial and
BP-S: bipolar-serial), on the removal efficiencies of heavy metals were
explored to determine the optimum operating conditions. Removal
efficiencies of 99.77% for Cr, 85.62% for Ni and 99.04% for Zn at the
optimum operating conditions (pH(i) 5.4, current density of 30A/m(2),
operating time of 30min and MP-P electrode connection mode) were
obtained. The results showed that Cr, Ni and Zn removal efficiencies
from GRW increased with increasing current density and pH at MP-P
electrode connection mode. The results showed that EC can effectively
reduce metal ions to a very low level. Amount of sludge generated and
operating cost at the optimum conditions during the EC process were
calculated as 2.32kg/m(3) and 0.70Euro/m(3). This study revealed that
the EC process was very effective for removal of Cr, Ni and Zn from GRW.
BibTeX:
@article{ISI:000362845800006,
  author = {Kobya, M and Erdem, N and Demirbas, E},
  title = {Treatment of Cr, Ni and Zn from galvanic rinsing wastewater by electrocoagulation process using iron electrodes},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2015},
  volume = {56},
  number = {5},
  pages = {1191--1201},
  doi = {10.1080/19443994.2014.951692}
}
Bououdina M, Oral AY and Oral ZBB (2015), "Preface to the special section on ``Hydrogen energy efficiency and advanced materials for hydrogen production, storage and fuel cells''", INTERNATIONAL JOURNAL OF HYDROGEN ENERGY. Vol. 40(40), pp. 14020.
BibTeX:
@article{ISI:000363080200016,
  author = {Bououdina, M and Oral, A Yavuz and Oral, Z Banu Bahsi},
  title = {Preface to the special section on ``Hydrogen energy efficiency and advanced materials for hydrogen production, storage and fuel cells''},
  journal = {INTERNATIONAL JOURNAL OF HYDROGEN ENERGY},
  year = {2015},
  volume = {40},
  number = {40},
  pages = {14020},
  doi = {10.1016/j.ijhydene.2015.09.031}
}
Guler E, Engin OG, Celen M and Erkan SH (2015), "COST ANALYSIS OF SEAWATER DESALINATION USING AN INTEGRATED REVERSE OSMOSIS SYSTEM ON A CRUISE SHIP", GLOBAL NEST JOURNAL., may, 2015. Vol. 17(2), pp. 389-396.
Abstract: The best method to treat seawater is known to be the use of reverse
osmosis (RO) systems. The cost factor becomes the most important issue
when using RO systems. Although quite costly, RO systems are essential
systems for ships. As known very well, water is a critical resource on
ships, especially the ones serving quite a large number of passengers.
In this study, therefore, RO system capability under different
conditions together with cost analysis was examined on a relatively
small cruise ship. The system used had a daily water treatment capacity
of 30 m(3). The RO system was composed of a sand filter, a cartridge
filter, four pieces of membrane filter modules and a mineral filter.
During the study, samples from the Black Sea, the Aegean Sea and the
Mediterranean Sea, which have different physical and chemical
properties, were examined from the quality point of view. A
comprehensive cost analysis was also performed in order to determine the
feasibility of the system for the production of potable water for a
cruise ship.
BibTeX:
@article{ISI:000366543000016,
  author = {Guler, E and Engin, Onkal G and Celen, M and Erkan, Sari H},
  title = {COST ANALYSIS OF SEAWATER DESALINATION USING AN INTEGRATED REVERSE OSMOSIS SYSTEM ON A CRUISE SHIP},
  journal = {GLOBAL NEST JOURNAL},
  year = {2015},
  volume = {17},
  number = {2},
  pages = {389--396}
}
Tursun Y and Keskinler B (2015), "DETERMINING THE EFFECTS OF INDUSTRIAL DISCHARGES ON URBAN WASTEWATER CHARACTERISTICS AND THE PLANT OPERATION, INSPECTION OF INDUSTRIAL DISCHARGES", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 24(10B), pp. 3524-3531.
Abstract: Industrial waste-waters should be discharged into the sewer system at
the place of origin, following a pre-treatment process. Thus, it could
be ensured that the wastewater discharge into the sewer system is below
the limit thresholds. It is of utmost importance that the industries
fulfill their legal responsibility for pre-treatment, as this helps in
secondary treatment efficiency. In order to ensure this, the operation
of and discharge of existing treatment plants should be inspected on a
regular basis.
In this study, the 42 Evler Wastewater Treatment Plant (WIT) under the
General Directorate of Kocaeli Water,Sewerage Administration (ISU) was
characterized, and the industrial discharges effects on the general
wastewater features and their impact to general operation were examined.
It was concluded that the industries did not observe discharge limits as
specified in the Regulations for Wastewater Discharge into Sewage
(AKDY). It was also be noted that, if the regulations were observed, the
sludge production, oxygen demand, and energy costs could be reduced by
63, 72, and 72%, respectively. It was observed that the yeast industry
and domestic wastewaters are two of the largest sources of impact on
this wastewater treatment plant. All industries located in this area are
examined by ISU inspection units, and the results obtained from the
analyses of the samples collected during these inspections, were not
compatible with the urban WIT results; the only explanation for this was
illegal discharge.
At the end of this study, it was suggested that the industrial
inspections should be conducted by more technological methods and more
conventional methods should be abandoned.
BibTeX:
@article{ISI:000366880600017,
  author = {Tursun, Yeter and Keskinler, Bulent},
  title = {DETERMINING THE EFFECTS OF INDUSTRIAL DISCHARGES ON URBAN WASTEWATER CHARACTERISTICS AND THE PLANT OPERATION, INSPECTION OF INDUSTRIAL DISCHARGES},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2015},
  volume = {24},
  number = {10B},
  pages = {3524--3531}
}
Aydiner C, Sen U, Topcu S, Sesli D, Ekinci D, Altınay AD, Ozbey B, Koseoglu-Imer DY and Keskinler B (2014), "Techno-economic investigation of water recovery and whey powder production from whey using UF/RO and FO/RO integrated membrane systems", Desalination and Water Treatment. Vol. 52(1-3), pp. 123-133.
BibTeX:
@article{Aydiner2014,
  author = {Aydiner, Coskun and Sen, Unal and Topcu, Semra and Sesli, Duygu and Ekinci, Didem and Altınay, Aysegul Derya and Ozbey, Bahar and Koseoglu-Imer, Derya Yuksel and Keskinler, Bulent},
  title = {Techno-economic investigation of water recovery and whey powder production from whey using UF/RO and FO/RO integrated membrane systems},
  journal = {Desalination and Water Treatment},
  year = {2014},
  volume = {52},
  number = {1-3},
  pages = {123--133},
  url = {http://www.tandfonline.com/doi/abs/10.1080/19443994.2013.786655},
  doi = {10.1080/19443994.2013.786655}
}
Barisci S and Oncel MS (2014), "THE DISPOSAL OF COMBED COTTON WASTES BY PYROLYSIS", INTERNATIONAL JOURNAL OF GREEN ENERGY., mar, 2014. Vol. 11(3), pp. 255-266.
Abstract: The main objective of this work is to propose an alternative method for
disposing of combed cotton wastes consisting of swatches with various
sizes and shapes. For this purpose, pyrolysis of combed cotton waste was
conducted in a fixed bed reactor with the final temperatures of 450,
500, 550, and 600 degrees C. Effect of the experimental conditions such
as temperature, catalyst type on the formation of liquid, gas, and char
products were investigated and product yields were measured. The highest
liquid product efficiency was achieved with 29.74% at the temperature
of 550 degrees C. CaCO3 and Na2CO3 were used as catalysts. Na2CO3 was
found to be more effective catalyst than CaCO3 The properties of the
obtained liquid product were analyzed by high performance liquid
chromatography (HPLC). Furans, ketones, aldehydes, less carboxylic
acids, and hydrocarbons were detected in the content of liquid product.
The calorific values of raw material, liquid product, and char were also
determined by using IKA C 200 calorimeter. The results clearly indicated
that both temperature and catalyst type affect the formation of liquid
product. Pyrolysis may be a useful way of waste management for energy
and material recovery.
BibTeX:
@article{ISI:000324613500003,
  author = {Barisci, Sibel and Oncel, M Salim},
  title = {THE DISPOSAL OF COMBED COTTON WASTES BY PYROLYSIS},
  journal = {INTERNATIONAL JOURNAL OF GREEN ENERGY},
  year = {2014},
  volume = {11},
  number = {3},
  pages = {255--266},
  doi = {10.1080/15435075.2013.772516}
}
Dizge N (2014), "Performance evaluation of cross-flow membrane system for wastewater reuse from the wood-panels industry", ENVIRONMENTAL TECHNOLOGY., mar, 2014. Vol. 35(6), pp. 681-690.
Abstract: The objectives of this investigation were to perform a series of
lab-scale membrane separation experiments under various operating
conditions to investigate the performance behaviour of nanofiltration
membrane (NF 270) for wastewater reuse from the wood-panels industry.
The operating condition effects, e.g. cross-flow velocity (CFV), trans
membrane pressure (TMP) and temperature, on the permeate flux and
contaminant rejection efficiency were investigated. Moreover, three
different samples: (1) raw wastewater collected from the wood-panels
industry; (2) ultrafiltration pre-treated wastewater (UF-NF); and (3)
coagulation/flocculation pre-treated wastewater (CF-NF) were employed in
this study. The UF-NF was proposed as a pre-treatment process because it
could reduce the chemical oxygen demand (COD) effectively with lower
energy consumption than CF-NF. The performance of NF 270 membrane was
assessed by measurements of the many parameters (pH, conductivity, total
dissolved solids, COD, suspended solids, total nitrogen, nitrite,
nitrate, and total phosphate) under various operating conditions. It was
noted that the contaminant rejection was affected by changing TMP and
CFV. It was concluded that the purified water stream can be recycled
into the process for water reuse or safely disposed to the river.
BibTeX:
@article{ISI:000329153800003,
  author = {Dizge, Nadir},
  title = {Performance evaluation of cross-flow membrane system for wastewater reuse from the wood-panels industry},
  journal = {ENVIRONMENTAL TECHNOLOGY},
  year = {2014},
  volume = {35},
  number = {6},
  pages = {681--690},
  doi = {10.1080/09593330.2013.841293}
}
Ergenekon P and Ulutas K (2014), "Heavy Metal Content of Total Suspended Air Particles in the Heavily Industrialized Town of Gebze, Turkey", BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY. Vol. 92(1), pp. 90-95.
Abstract: Air pollution is a serious environmental problem in industrialized
towns, where a significant portion of the residents live in close
proximity to factories and major highways with high traffic load. In
this study, the ambient air quality in Gebze, an industrial region with
an area of 438 km(2) and a population of 300,000, was characterized in
terms for total suspended particulate matter and its composition of
trace elements, i.e. Cd, Cr, Cu, Fe, Mn, Ni and Pb. Samples were
collected using high volume samplers from March to June 2009 at two
sites during the day and the night. A significantly higher Cu
concentrations during night suggested that Cu emissions were the result
of a local source. The known air toxics, Cd and Ni, had average
concentrations (34 and 43 ng/m(3), respectively) higher than proposed by
the European Union's ambient air quality standards. These results
highlight the potential health risks for the local population.
BibTeX:
@article{ISI:000329227000017,
  author = {Ergenekon, Pinar and Ulutas, Kadir},
  title = {Heavy Metal Content of Total Suspended Air Particles in the Heavily Industrialized Town of Gebze, Turkey},
  journal = {BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY},
  year = {2014},
  volume = {92},
  number = {1},
  pages = {90--95},
  doi = {10.1007/s00128-013-1148-7}
}
Kobya M, Akyol A, Demirbas E and Oncel MS (2014), "Removal of Arsenic from Drinking Water by Batch and Continuous Electrocoagulation Processes Using Hybrid Al-Fe Plate Electrodes", ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY. Vol. 33(1), pp. 131-140.
Abstract: Removals of arsenic from drinking water by electrocoagulation (EC)
process using six different combinations of hybrid electrodes (Al-Fe),
and Al-Al or Fe-Fe electrodes as all anodes and cathodes in a batch mode
were evaluated. The removal process with monopolar series mode at
optimum operating conditions (2.50 A/m(2), 150 mu g/L, and pH 7.0)
indicated that Fe-Al-Al-Fe (anode-cathode-anode-cathode) hybrid plate
electrode pairs were the most efficient choice in terms of arsenic
removal efficiency (96% in 1 min) and operating cost (0.00202
Euro/m(3)). The arsenic removal from drinking water by continuous EC
(CEC) process using Fe-Al-Al-Fe hybrid plate electrode pairs was also
studied with respect to flow rates and initial arsenic concentrations.
The effluent arsenic concentration of 10 mu g/L in the CEC process was
achieved at 3 min for 0.05 L/min (5.9 mu g/L), 8 min for 0.10 L/min (6.3
mu g/L), and 20 min for 0.20 L/min (8.4 mu g/L), respectively. Amounts
of the sludge and operating costs in the CEC process with respect to
some experimental parameters such as operating time (3-20 min) and flow
rate (0.05-0.20 L/min) at 150 mu g/L were determined as 0.0095-0.025
kg/m(3) and 0.009-0.060 Euro/m(3). (c) 2013 American Institute of
Chemical Engineers Environ Prog, 33: 131-140, 2014
BibTeX:
@article{ISI:000329309300014,
  author = {Kobya, M and Akyol, A and Demirbas, E and Oncel, M S},
  title = {Removal of Arsenic from Drinking Water by Batch and Continuous Electrocoagulation Processes Using Hybrid Al-Fe Plate Electrodes},
  journal = {ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY},
  year = {2014},
  volume = {33},
  number = {1},
  pages = {131--140},
  doi = {10.1002/ep.11765}
}
Basaran ST, Aysel M, Kurt H, Ergal I, Akarsubasi A, Yagci N, Dogruel S, Cokgor EU, Keskinler B, Sozen S and Orhon D (2014), "Kinetic characterization of acetate utilization and response of microbial population in super fast membrane bioreactor", JOURNAL OF MEMBRANE SCIENCE. Vol. 455, pp. 392-404.
Abstract: The study investigated the functional relationships between changes in
microbial community induced by different sludge ages (SRT) selected for
super fast MBR operation on variable process kinetics, fate of soluble
microbial products (SMPs) and system performance. Acetate, a simple and
separately identifiable compound, was selected as the sole organic
carbon source. MBR operation was monitored at steady-state at extremely
low SRT levels of 2.0, 1.0 and 0.5 cl and a hydraulic retention time of
1.0 h. Batch experiments were conducted for kinetic evaluation of MBR
performance by model evaluation of oxygen uptake rate,
polyhydroxybutyric acid and COD profiles. Bacterial DGGE profiles
indicated that SRT exerted shifts in the composition of microbial
community. Model evaluation of experimental data also confirmed
molecular analyses, indicating variable growth kinetics for utilization
of acetate and identified high and variable endogenous respiration as a
function of SRT. Changes in the microbial community and process kinetics
did not affect MBR performance, providing complete depletion of
available acetate. Effluent COD remained below 17 mg/L and entirely
composed of SMPs. Particle size analysis revealed a bimodal distribution
of the wide spectrum of SMPs above 13 nm and below 2 nm. Effective
filtration size of the membrane was reduced to 8 nm due to cake
filtration effect. The retained fraction of SMPs was in the range of 1-2
mg/L, but accumulated in the reactor volume, same way as biomass.
Therefore, the real merit of super fast MBR was the very low levels of
SMP generation (14-18 mg COD/L), rather than the effective capture of
accumulated COD due to cake filtration. (C) 2013 Elsevier B.V. All
rights reserved.
BibTeX:
@article{ISI:000330952900041,
  author = {Basaran, S Teksoy and Aysel, M and Kurt, H and Ergal, I and Akarsubasi, A and Yagci, N and Dogruel, S and Cokgor, E Ubay and Keskinler, B and Sozen, S and Orhon, D},
  title = {Kinetic characterization of acetate utilization and response of microbial population in super fast membrane bioreactor},
  journal = {JOURNAL OF MEMBRANE SCIENCE},
  year = {2014},
  volume = {455},
  pages = {392--404},
  doi = {10.1016/j.meinsci.2013.12.035}
}
Durmazpinar S, Ilhan N, Demir G, Insel G, Dizge N, Ergenekon P, Erhan E and Keskinler B (2014), "Biological NOx removal by denitrification process in a jet-loop bioreactor: system performance and model development", ENVIRONMENTAL TECHNOLOGY. Vol. 35(11), pp. 1358-1366.
Abstract: Nitrogen monoxide (NO) and nitrogen dioxide referred as NOx are one of
the most important air pollutants in the atmosphere. Biological NOx
removal technologies have been developing to reach a cost-effective
control method for upcoming stringent NOx emission standards. The
BioDeNOx system was seen as a promising biological NOx control
technology which is composed of two reactors, one for absorbing of NO in
an aqueous Fe(II)EDTA(2-) solution and the other for subsequent
reduction to N-2 gas in a biological reactor by the denitrification
process. In this study, instead of two discrete reactors, only one
jet-loop bioreactor (JLBR) was utilized as both absorption and
denitrification unit and no chelate-forming chemicals were added. In
other words, the advantage of better mass transfer conditions of jet
bioreactor was used instead of Fe(II)EDTA(2-). The process was named as
Jet-BioDeNOx. The JLBR was operated for the removal of NOx from air
streams containing 500-3000ppm NOx and the results showed that the
removal efficiency was between 81% and 94%. The air to liquid flow
ratio (Q(G)/Q(RAS)) varied in the range of 0.07-0.12. Mathematical
modelling of the system demonstrated that the removal efficiency
strongly depends on this ratio. The high mass transfer conditions
prevailed in the reactor provided a competitive advantage on removing NO
gas without any requirement of chelating chemicals.
BibTeX:
@article{ISI:000331357300006,
  author = {Durmazpinar, Serdar and Ilhan, Nalan and Demir, Gonca and Insel, Guclu and Dizge, Nadir and Ergenekon, Pinar and Erhan, Elif and Keskinler, Bulent},
  title = {Biological NOx removal by denitrification process in a jet-loop bioreactor: system performance and model development},
  journal = {ENVIRONMENTAL TECHNOLOGY},
  year = {2014},
  volume = {35},
  number = {11},
  pages = {1358--1366},
  doi = {10.1080/09593330.2013.868529}
}
Keris-Sen UD, Sen U, Soydemir G and Gurol MD (2014), "An investigation of ultrasound effect on microalgal cell integrity and lipid extraction efficiency", BIORESOURCE TECHNOLOGY. Vol. 152, pp. 407-413.
Abstract: In this study, different ultrasound power intensities (0.1-0.5 W mL(-1))
were applied at a frequency of 30 kHz and for durations of 5-60 min to
mixed microalgal cultures, one cultivated in BG11 medium, and the other
in secondary effluent wastewater. The ultrasonic effect on cell
disruption was revealed by increased concentrations of protein and
carbohydrate released into the solution, and a decreased concentration
of total suspended solids in cell suspension. The highest intercellular
material release was achieved at an ultrasonic energy intensity of 0.4
kWh L-1, while the effect of ultrasound on cell disruption was reduced
at higher energy intensities. Additionally, the ultrasonic effect on
lipid extraction efficiency was studied in the presence of two different
solvents, n-hexane and chloroform/methanol mixture. The application of
ultrasound at 0.4 kWh L-1, provided 1.5-2.0-fold increase in lipid
extraction yields in the presence of the solvents. (C) 2013 Elsevier
Ltd. All rights reserved.
BibTeX:
@article{ISI:000331460400055,
  author = {Keris-Sen, Ulker D and Sen, Unal and Soydemir, Gulfem and Gurol, Mirat D},
  title = {An investigation of ultrasound effect on microalgal cell integrity and lipid extraction efficiency},
  journal = {BIORESOURCE TECHNOLOGY},
  year = {2014},
  volume = {152},
  pages = {407--413},
  doi = {10.1016/j.biortech.2013.11.018}
}
Bayar S and Karagunduz A (2014), "Influence of electrical field on COD removal and filterability of activated sludge", DESALINATION AND WATER TREATMENT. Vol. 52(7-9), pp. 1316-1323.
Abstract: Three batch reactors were operated in order to investigate the effects
of electrocoagulation and electrical field on chemical oxygen demand
(COD) degradation rates, efficiencies, and filterability. The first
reactor was operated with iron electrode, the second reactor was
operated with relatively inert titanium electrode, and the last one was
run as control without any electrical field. The electrical field
application with iron electrodes increased the COD degradation rates at
0.5 and 2.5V/cm with COD removals around 90%. However, the removal
efficiencies decreased down to 70% at 5V/cm. Increases in degradation
rates were observed with titanium electrodes with time at all the three
voltages. Activated sludge from the reactor with iron electrodes showed
excellent filtration properties at 2.5 and 5V/cm experiments. This was
attributed to iron precipitates screening membrane foulants and
preventing the formation of high resistive cake layer and pore structure
rather than floc size increase. Electrocoagulation showed promising
results in reducing membrane fouling. A critical voltage gradient should
be maintained and the magnitude of iron electrode dissolution should be
controlled in the reactor to obtain optimum COD degradation and to
enhance filterability. Sludge samples from reactor with titanium
electrodes showed poor filterability as voltage gradient increased (at
5V/cm). This was attributed to the elevated soluble protein content
(SMPp) concentration due to cell disruption.
BibTeX:
@article{ISI:000331695700009,
  author = {Bayar, Secil and Karagunduz, Ahmet},
  title = {Influence of electrical field on COD removal and filterability of activated sludge},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2014},
  volume = {52},
  number = {7-9},
  pages = {1316--1323},
  doi = {10.1080/19443994.2013.787952}
}
Inan H and Alaydin E (2014), "Phosphate and nitrogen removal by iron produced in electrocoagulation reactor", DESALINATION AND WATER TREATMENT. Vol. 52(7-9), pp. 1396-1403.
Abstract: In this study, concentrated iron solution generated by
electrocoagulation (EC) process was used for the removal of nutrients
from human urine (yellow water). Yellow water was prepared synthetically
with major components: nitrogen and phosphorus. As a result of the pH
adjustment, nitrogen and phosphorus, which are present in urine, react
with electrochemically generated iron solution and then accumulate in
the sludge by precipitation. All experiments were done under different
pH values for the evaluation of this novel EC nutrient removal process.
The effect of the EC treatment on the removal of nutrients was followed
by total nitrogen and phosphate measurements and Fourier transform
infrared spectroscopy (FTIR). The effects of treatment parameters (pH,
iron/phosphate, iron/nitrogen, and iron/nutrient ratios) on the
performance of the EC treatment were also examined for the evaluation of
applicability of this novel EC method for the treatment of yellow
waters. The results show that the pH increase improved phosphate removal
efficiencies at definite molar nutrient ratios. The phosphate removal
efficiency was approximately 98% at pH 8 for 1:1 of iron/nutrient molar
ratio and on the other hand, nitrogen removal was only 21% at pH 8 for
4:1 of iron/urea molar ratio. Total organic carbon (TOC) removal
efficiency was reached to 26% of the process. FTIR adsorption spectra
were discussed for the sludge obtained.
BibTeX:
@article{ISI:000331695700019,
  author = {Inan, Hatice and Alaydin, Elif},
  title = {Phosphate and nitrogen removal by iron produced in electrocoagulation reactor},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2014},
  volume = {52},
  number = {7-9},
  pages = {1396--1403},
  doi = {10.1080/19443994.2013.787950}
}
Barlik N and Keskinler B (2014), "Sulfonation of crosslinked styrene/divinyl benzene copolymer beads formed from porous foam and ion adsorption of copper by them: column adsorption modeling", WATER SCIENCE AND TECHNOLOGY. Vol. 69(2), pp. 286-292.
Abstract: The porous foam is made by the polymerisation of a high internal phase
emulsion and it is a highly porous, low density, open cellular material.
Surface properties of the foam were chemically modified via a
sulfonation process. Sulfonation added -SO3-H+ groups to the polymer
matrix. The ion adsorption behavior of copper ions on sulfonated polymer
beads, depending on inlet concentration (10-60 mg/L), pH of inlet
solution (2.00-5.20) and flow velocity (1.7-11.4 m/h) was studied. It
was shown that the amount of copper adsorbed was not affected with
increasing concentration of feed solutions and flow velocity. Also the
process was highly pH dependent. The maximum removal was 117.96 mg Cu/g
dry adsorbent at flow velocity 11.4 m/h. Column experimental tests were
conducted to provide data for theoretical modeling and to verify the
system performance of the process. A theoretical column model adopted in
this work was found to describe well the ion adsorption breakthrough
characteristics.
BibTeX:
@article{ISI:000331947200008,
  author = {Barlik, Necla and Keskinler, Bulent},
  title = {Sulfonation of crosslinked styrene/divinyl benzene copolymer beads formed from porous foam and ion adsorption of copper by them: column adsorption modeling},
  journal = {WATER SCIENCE AND TECHNOLOGY},
  year = {2014},
  volume = {69},
  number = {2},
  pages = {286--292},
  doi = {10.2166/wst.2013.703}
}
Aydiner C, Sen U, Topcu S, Ekinci D, Altinay AD, Koseoglu-Imer DY and Keskinler B (2014), "Techno-economic viability of innovative membrane systems in water and mass recovery from dairy wastewater", JOURNAL OF MEMBRANE SCIENCE., may, 2014. Vol. 458, pp. 66-75.
Abstract: Viability of innovative treatment systems in recovery of water and mass
from dairy wastewater was techno-economically investigated. Lab-scale
experiments were carried out for water recovery from whey wastewater
using two combined membrane processes as forward osmosis (FO)/membrane
distillation (MD) and MD/reverse osmosis (RO). Raw whey was concentrated
to the solid contents of 21.0% and 25.8% by FO/MD and MD/RO,
respectively. Production of commercial whey powders was successfully
accomplished by spray drying of the concentrated whey streams.
Full-scale costs of both systems were individually estimated using
process modeling and cost estimation software. The simulations for a
design influent of 100 m(3)/clay showed that water can be recovered in
sufficient quality to be reused in cheese production and the recovered
amount increases up to 66-68% compared to 30% for that of UF/RD
system. Besides, both treatment systems yielded a return of 12-13
million with annual net profit of about 800,000 as competing with
UF/RO. Pay back times of the system investments were determined as
satisfactory as under 1 year clue to annual revenues of about 3.4
million from water recovery and whey powder selling. The innovative
systems studied seemed to have conclusively enabled more sustainable
dairy waste management with good economic benefits. (C) 2014 Elsevier
B.V. All rights reserved.
BibTeX:
@article{ISI:000333421200007,
  author = {Aydiner, Coskun and Sen, Unal and Topcu, Semra and Ekinci, Didem and Altinay, Aysegul D and Koseoglu-Imer, Derya Y and Keskinler, Bulent},
  title = {Techno-economic viability of innovative membrane systems in water and mass recovery from dairy wastewater},
  journal = {JOURNAL OF MEMBRANE SCIENCE},
  year = {2014},
  volume = {458},
  pages = {66--75},
  doi = {10.1016/j.memsci.2014.01.058}
}
Yucel Y, Demir C, Dizge N and Keskinler B (2014), "Methods for Lipase Immobilization and Their Use for Biodiesel Production from Vegetable Oil", ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS. Vol. 36(11), pp. 1203-1211.
Abstract: In the present work, two different lipases (triacylglycerol hydrolase,
EC 3.1.1.3), Lipozyme TL-100L and Novozyme 388, were immobilized onto
three different low-cost supports using both adsorption and covalent
method: celite 545, silica gel, and styrene-divinylbenzene copolymer.
The maximum immobilization yield was obtained as 79.0% for Lipozyme
TL-100L and the highest specific activity was 6.5 U/mg protein for
Novozym 388. The properties of the support and immobilized derivatives
were characterized by Fourier transform infrared spectroscopy. Maximum
methyl esters yield was obtained as 98.3%. The lipases, which are
immobilized by covalently, proved to be stable after even 10 repeated
reuses.
BibTeX:
@article{ISI:000333875400007,
  author = {Yucel, Y and Demir, C and Dizge, N and Keskinler, B},
  title = {Methods for Lipase Immobilization and Their Use for Biodiesel Production from Vegetable Oil},
  journal = {ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS},
  year = {2014},
  volume = {36},
  number = {11},
  pages = {1203--1211},
  doi = {10.1080/15567036.2010.545805}
}
Barisci S, Ulu F, Sarkka H, Dimoglo A and Sillanpaa M (2014), "Electrosynthesis of Ferrate (VI) ion Using High Purity Iron Electrodes: Optimization of Influencing Parameters on the Process and Investigating Its Stability", INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE. Vol. 9(6), pp. 3099-3117.
Abstract: This study is focused on the determination of optimum conditions for
ferrate (VI) production and its stability. The effect of various
operating parameters, such as NaOH concentration, current density,
temperature and electrolysis duration on the yield of electrochemical
ferrate (VI) ion production was investigated for high purity iron
electrodes. Cyclic Voltammetry (CV) studies were carried out to
characterize a process that takes place on the working iron electrode.
The surface of high purity iron electrode was analyzed by Scanning
Electron Microscopy (SEM). Electrosynthesized ferrate (VI) ion stability
at different conditions was also investigated. Factors influencing the
stability were initial ferrate (VI) ion concentration, alkalinity,
temperature, and pH of the solution. Ferrate (VI) ion showed high
stability at higher alkalinity, lower temperatures, increasing ferrate
(VI) ion concentration and pH in the range between 9.2 and 10. Current
efficiency and energy consumption were used for the optimum parameters
determination for the ferrate (VI) production. According to the
experiments, the optimum conditions were NaOH (as anolyte) concentration
of 20 M, current density of 1.47 mA/cm(2), and temperature of 30 +/- 1
degrees C with electrolysis duration of 1.5 hours. Ferrate (VI) ion
solutions with contents up to 2.0 mM were produced in the
electrochemical cell.
BibTeX:
@article{ISI:000334493300033,
  author = {Barisci, Sibel and Ulu, Feride and Sarkka, Heikki and Dimoglo, Anatholy and Sillanpaa, Mika},
  title = {Electrosynthesis of Ferrate (VI) ion Using High Purity Iron Electrodes: Optimization of Influencing Parameters on the Process and Investigating Its Stability},
  journal = {INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE},
  year = {2014},
  volume = {9},
  number = {6},
  pages = {3099--3117}
}
Prodius D, Shah HS, Iqbal J, Macaeva A, Dimoglo A, Kostakis GE, Zill N, Macaev F and Powell AK (2014), "A novel example of double 6-exo-trig heterocyclization: nitrile conversion to new anticancer active (HeLa cells) primary amine ionic liquids", CHEMICAL COMMUNICATIONS. Vol. 50(38), pp. 4888-4890.
Abstract: Conversion of nitriles under mild conditions leads to a new class of
primary amines, including room temperature ionic liquids, acting as
efficient anticancer agents.
BibTeX:
@article{ISI:000334736900004,
  author = {Prodius, Denis and Shah, Hamid Saeed and Iqbal, Jamshed and Macaeva, Anastasia and Dimoglo, Anatoli and Kostakis, George E and Zill, Nicolas and Macaev, Fliur and Powell, Annie K},
  title = {A novel example of double 6-exo-trig heterocyclization: nitrile conversion to new anticancer active (HeLa cells) primary amine ionic liquids},
  journal = {CHEMICAL COMMUNICATIONS},
  year = {2014},
  volume = {50},
  number = {38},
  pages = {4888--4890},
  doi = {10.1039/c3cc49759c}
}
Karagoz P and Ozkan M (2014), "Ethanol production from wheat straw by Saccharomyces cerevisiae and Scheffersomyces stipitis co-culture in batch and continuous system", BIORESOURCE TECHNOLOGY. Vol. 158, pp. 286-293.
Abstract: In this research, Scheffersomyces stipitis and Saccharomyces cerevisiae
in immobilized and suspended state were used to convert pentose and
hexose sugars to ethanol. In batch and continuous systems, S. stipitis
and S. cerevisiae co-culture performance was better than S. cerevisiae.
Continuous ethanol production was performed in packed bed immobilized
cell reactor (ICR). In ICR, S. stipitis cells were found to be more
sensitive to oxygen concentration and other possible mass transfer
limitations as compared to S. cerevisiae. Use of co-immobilized S.
stipitis and S. cerevisiae resulted in maximum xylose consumption
(73.92%) and 41.68 g/L day ethanol was produced at HRT (hydraulic
retention time) of 6 h with wheat straw hydrolysate. At HRT of 0.75 h,
the highest amount of ethanol with the values of 356.21 and 235.43 g/L
day was produced when synthetic medium and wheat straw hydrolysate were
used as feeding medium in ICR, respectively. (C) 2014 Elsevier Ltd. All
rights reserved.
BibTeX:
@article{ISI:000334830300040,
  author = {Karagoz, Pinar and Ozkan, Melek},
  title = {Ethanol production from wheat straw by Saccharomyces cerevisiae and Scheffersomyces stipitis co-culture in batch and continuous system},
  journal = {BIORESOURCE TECHNOLOGY},
  year = {2014},
  volume = {158},
  pages = {286--293},
  doi = {10.1016/j.biortech.2014.02.022}
}
Kobya M, Gengec E, Sensoy MT and Demirbas E (2014), "Treatment of textile dyeing wastewater by electrocoagulation using Fe and Al electrodes: optimisation of operating parameters using central composite design", COLORATION TECHNOLOGY. Vol. 130(3), pp. 226-235.
Abstract: Textile dyeing wastewater was treated by electrocoagulation using
aluminium and iron plate electrodes. Response surface methodology and
central composite design were applied in the experiments and in
statistical data analysis. A current density of 30-100Am(-2), an initial
pH of 4-8, and an operating time of 10-40min were chosen as independent
variables, and the chemical oxygen demand, total organic carbon, and
turbidity removal efficiencies and the operating cost were selected as
responses in the electrocoagulation process. The developed quadratic
models for the responses and the experimental data were in good
agreement with model predictions statistically (R(2)0.92, Adj R(2)0.82,
and ProbtextgreaterFtextless0.004). The optimised operating variables (initial pH,
current density, and operating time) and the maximum total organic
carbon, chemical oxygen demand, and turbidity removal efficiencies for
textile dyeing wastewater were 5.5, 63.2Am(-2), 30.4min, 77%, 82%, and
94% for the iron electrode and 5.6, 52.5 Am-2, 33.9min, 68%, 69% and
99% for the aluminium electrode respectively. Minimum operating costs
for the iron and aluminium electrodes under optimum conditions were
Euro2.1m(-3) (Euro1.0kg(-1) COD) and Euro2.4m(-3) (Euro1.6kg(-1) COD).
The iron electrode was found to be superior to the aluminium electrode
in terms of removal efficiencies and operating cost for the treatment of
textile dyeing wastewater.
BibTeX:
@article{ISI:000335394000010,
  author = {Kobya, Mehmet and Gengec, Erhan and Sensoy, Mehmet Tonay and Demirbas, Erhan},
  title = {Treatment of textile dyeing wastewater by electrocoagulation using Fe and Al electrodes: optimisation of operating parameters using central composite design},
  journal = {COLORATION TECHNOLOGY},
  year = {2014},
  volume = {130},
  number = {3},
  pages = {226--235},
  doi = {10.1111/cote.12090}
}
Herand BK, Simsek EK, Oncel MS and Ozkan M (2014), "Continuous metal bioremoval by new bacterial isolates in immobilized cell reactor", ANNALS OF MICROBIOLOGY. Vol. 64(2), pp. 699-706.
Abstract: In this study, four bacterial species isolated from an industrially
polluted region at the Istanbul-Kocaeli border were characterized and
their efficiencies for bioremoval of Cu2+, Ni2+, Cr3+, Zn2+, and Fe2+
were determined in batch and continuous systems. Strain N4c was used for
continuous metal bioremoval in a packed-bed immobilized cell reactor
(ICR) with a working volume of 180 ml. ICR was successfully operated for
treatment of synthetic wastewater containing 200 mg/l Cu2+ and Ni2+ for
140 and 80 h, respectively. Bioremoval efficiency of ICR for Cu2+
reached around 90 % in the last 3 days of operation at a flow rate of 1
ml/min. Ni2+ bioremoval in ICR was less efficient as the system worked
for only 80 h and bioremoval efficiency decreased from 73.3 to 42.8 %
during the operation period. Wastewater containing one or two types of
metal seems to be a good candidate for treatment with immobilized N4c
cells in a continuous system. Survival of the cells in the wastewater
was found to be an important parameter affecting bioremoval efficiency
in both batch and continuous systems. The ICR used in this study can be
scaled up for treatment of industrial wastewaters containing Ni2+ or
Cu2+.
BibTeX:
@article{ISI:000336277900031,
  author = {Herand, Binnur Kiratli and Simsek, Esra Karlik and Oncel, Mehmet Salim and Ozkan, Melek},
  title = {Continuous metal bioremoval by new bacterial isolates in immobilized cell reactor},
  journal = {ANNALS OF MICROBIOLOGY},
  year = {2014},
  volume = {64},
  number = {2},
  pages = {699--706},
  doi = {10.1007/s13213-013-0705-y}
}
Senturk E, Ince M and Engin GO (2014), "The effect of shock loading on the performance of a thermophilic anaerobic contact reactor at constant organic loading rate", JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING., may, 2014. Vol. 12
Abstract: The influences of organic loading disturbances on the process
performance of a thermophilic anaerobic contact reactor treating
potato-processing wastewater were investigated. For this purpose, while
the reactor was operated at steady state conditions with organic loading
rate of 5.5 kg COD/m(3) . day, an instant acetate concentration increase
(1 g/L) was introduced to the reactor. During the shock loading test of
acetate, it was observed that the overall process performance was
adversely affected by all the shock loading, however, the system reached
steady state conditions less than 24 hours of operation indicating that
thermophilic anaerobic contact reactor is resistant to shock loading and
be capable of returning its normal conditions within a short time
period.
BibTeX:
@article{ISI:000336678100001,
  author = {Senturk, Elif and Ince, Mahir and Engin, Guleda Onkal},
  title = {The effect of shock loading on the performance of a thermophilic anaerobic contact reactor at constant organic loading rate},
  journal = {JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING},
  year = {2014},
  volume = {12},
  doi = {10.1186/2052-336X-12-84}
}
Cetin B (2014), "Soil concentrations and source apportionment of polybrominated diphenyl ethers (PBDEs) and trace elements around a heavily industrialized area in Kocaeli, Turkey", ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH. Vol. 21(13), pp. 8284-8293.
Abstract: Air pollutants are transported by dry deposition, wet deposition, and
gas exchange accumulated in soil. Therefore, soil is an important
environmental medium reflecting the level and the spatial distribution
of air pollutants such as polybrominated diphenyl ethers (PBDEs) and
heavy metals. Soil concentrations of seven PBDE congeners and 21 trace
elements were determined in a heavily industrialized region (Dilovasi)
in Kocaeli, Turkey. At all sites, Sigma 7PBDE concentrations ranged from
0.70 to 203 with a mean value of 26.3 mu g kg(-1) (dry weight). The
congener profiles and mass inventories of PBDEs and their interactions
with soil organic matter (SOM) were also investigated. BDE-209 was the
dominant congener at all sites, followed by BDE-99 and/or -47. The
estimated inventory of PBDEs for the Dilovasi district was 310 kg.
However, there are several additional industrial regions in Kocaeli
city. Considering the total land area, the potential inventory would be
much larger for this city. The relationship between the PBDE
concentrations in soil and SOM content indicated that factors other than
soil properties have a greater influence on soil concentrations. Crustal
enrichment factors (EFs) were determined; correlation analysis and
factor analysis (FA) were also applied to generated data set to identify
and apportion the sources polluting the soil. Sn, Mn, Ca, As, Zn, Pb,
and Cd had significantly high average EF values, indicating that their
soil concentrations were mainly influenced by anthropogenic activities.
In FA, six factors were extracted with a cumulative variance of 84.4 %
and industrial activities and traffic were found to be the main factors
affecting the soil profile.
BibTeX:
@article{ISI:000337086600046,
  author = {Cetin, Banu},
  title = {Soil concentrations and source apportionment of polybrominated diphenyl ethers (PBDEs) and trace elements around a heavily industrialized area in Kocaeli, Turkey},
  journal = {ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH},
  year = {2014},
  volume = {21},
  number = {13},
  pages = {8284--8293},
  doi = {10.1007/s11356-014-2825-8}
}
Pinar K and Melek O (2014), "Effect of Clostridium thermocellum activity on enzymatic hydrolysis of alkaline peroxide pretreated wheat straw", RESEARCH JOURNAL OF BIOTECHNOLOGY. Vol. 9(7), pp. 25-31.
Abstract: In this study, the microbial activity of Clostridium thermocellum on the
hydrolysis of raw and pretreated wheat straw (WS) was investigated. The
microbial activity was compared with the activity of enzyme mixture. It
was found that alkaline peroxide pretreatment improves both microbial
and the enzymatic digestibility of WS. Activity of C. thermocellum on
the pretreated biomass is almost equal to the activity of 35 mu l/g
enzyme which is equal to 5% of enzyme usage for complete
saccharification of pretreated biomass. It was observed that enzymatic
saccharification after C. thermocellum activity increased sugar release
by 6% as compared to the sole enzymatic digestion.
BibTeX:
@article{ISI:000338127600004,
  author = {Pinar, Karagoz and Melek, Ozkan},
  title = {Effect of Clostridium thermocellum activity on enzymatic hydrolysis of alkaline peroxide pretreated wheat straw},
  journal = {RESEARCH JOURNAL OF BIOTECHNOLOGY},
  year = {2014},
  volume = {9},
  number = {7},
  pages = {25--31}
}
Kilic MS, Korkut S, Hazer B and Erhan E (2014), "Development and operation of gold and cobalt oxide nanoparticles containing polypropylene based enzymatic fuel cell for renewable fuels", BIOSENSORS & BIOELECTRONICS. Vol. 61, pp. 500-505.
Abstract: Newly synthesized gold and cobalt oxide nanoparticle embedded
Polypropylene-g-Polyethylene glycol was used for a compartment-less
enzymatic fuel cell. Glucose oxidase and bilirubin oxidase were selected
as anodic and cathodic enzymes, respectively. Electrode fabrication and
EFC operation parameters were optimized to achieve high power output
Maximum power density of 23.5 mu W cm(-2) was generated at a cell
voltage of +560 mV vs Ag/AgCl, in 100 mM PBS pH 7.4 with the addition of
20 mM of synthetic glucose solution. 20 mu g of polymer amount with 185
mu g of glucose oxidase and 356 mu g of bilirubin oxidase was sufficient
to get maximum performance. The working electrodes could harvest
glucose, produced during photosynthesis reaction of Carpobrotus
Acinaciformis plant, and readily found in real domestic wastewater of
Zonguldak City in Turkey. (C) 2014 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000339692500073,
  author = {Kilic, Muhammet Samet and Korkut, Seyda and Hazer, Baki and Erhan, Elif},
  title = {Development and operation of gold and cobalt oxide nanoparticles containing polypropylene based enzymatic fuel cell for renewable fuels},
  journal = {BIOSENSORS & BIOELECTRONICS},
  year = {2014},
  volume = {61},
  pages = {500--505},
  doi = {10.1016/j.bios.2014.05.068}
}
Yilmaz O, Can ZS, Toroz I, Dogan O, Oncel S, Alp E, Dilek FB, Karanfil T and Yetis U (2014), "Use of theoretical waste inventories in planning and monitoring of hazardous waste management systems", WASTE MANAGEMENT & RESEARCH. Vol. 32(8), pp. 763-771.
Abstract: Hazardous waste (HW) generation information is an absolute necessity for
ensuring the proper planning, implementation, and monitoring of any
waste management system. Unfortunately, environmental agencies in
developing countries face difficulties in gathering data directly from
the creators of such wastes. It is possible, however, to construct
theoretical HW inventories using the waste generation factors (WGFs).
The objective of this study was to develop a complete nationwide HW
inventory of Turkey that relies on nation-specific WGFs to support
management activities of the Turkish Ministry of Environment and
Urbanization (MoEU). Inventory studies relied on WGFs from: (a) the
literature and (b) field studies and analysis of waste declarations
reflecting country-specific industrial practices. Moreover, new tools
were introduced to the monitoring infrastructure of MoEU to obtain a
comprehensive waste generation data set. Through field studies and a
consideration of country specific conditions, it was possible to more
thoroughly elucidate HW generation trends in Turkey, a method that was
deemed superior to other alternatives. Declaration and literature based
WGFs also proved most helpful in supplementing field observations that
could not always be conducted. It was determined that these theoretical
inventories could become valuable assets in supporting regulating
agencies in developing countries for a more thorough implementation of
HW management systems.
BibTeX:
@article{ISI:000341183800010,
  author = {Yilmaz, Ozge and Can, Zehra S and Toroz, Ismail and Dogan, Ozgur and Oncel, Salim and Alp, Emre and Dilek, Filiz B and Karanfil, Tanju and Yetis, Ulku},
  title = {Use of theoretical waste inventories in planning and monitoring of hazardous waste management systems},
  journal = {WASTE MANAGEMENT & RESEARCH},
  year = {2014},
  volume = {32},
  number = {8},
  pages = {763--771},
  doi = {10.1177/0734242X14542683}
}
Ulu F, Barisci S, Kobya M, Sarkka H and Sillanpaa M (2014), "Removal of humic substances by electrocoagulation (EC) process and characterization of floc size growth mechanism under optimum conditions", SEPARATION AND PURIFICATION TECHNOLOGY. Vol. 133, pp. 246-253.
Abstract: The aim of this study was to evaluate the treatability of synthetically
prepared humic acid solution by electrocoagulation (EC) process in batch
mode using aluminum and iron electrodes. The effect of the main
parameters pH, current density, and electrode type on natural organic
matter (NOM) removal was investigated. Also, in order to understand the
mechanism of floc formation and growth in electrocoagulation process,
zeta potential and particle size measurements were done. The larger
flocs and zeta potentials which closed to zero were observed at initial
pH (pH(i)) 4 rather than pH(i) 5 and 6 for Al electrode. When zeta
potential exhibited charge reversal, floc size reached to 5221 nm for
pH; 4 at the current density of 1.2 mA/cm(2). The zeta potential
remained negative over the whole pH range for Fe electrode. At pH(i) 4
and current density of 3 mA/cm(2), zeta potential value was -4.1 mV that
indicate strong coagulation-flocculation. At these conditions, the
maximum floc formation was 3042.3 nm. It can be concluded that, the
removal of pollutant is due to charge neutralization and compression of
double layer at lower initial pH value and sweeping and entrapment at
higher pH. The removal efficiency of EC method was determined with
respect to dissolved organic carbon (DOC) and UV/VIS absorbance at 254
and 436 nm reduction. Twenty-five minutes of process time with the
aluminum electrode led to DOC removal of 87.5% with final DOC
concentration of 2.01 mg/L and 91.1% UV-abs-254 removal was achieved
after 2 min at pH(i) 4 and at current density of 1.2 mA/cm(2). The
highest treatment efficiency for humic acid (HA) was 87% (DOCtreated
2.1 mg/L) at pH(i) 4 with iron electrodes. The short term best color
removal (VIS absorbance at 436 nm) reduction performance was obtained
with aluminum electrodes. (C) 2014 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000341552900030,
  author = {Ulu, Feride and Barisci, Sibel and Kobya, Mehmet and Sarkka, Heikki and Sillanpaa, Mika},
  title = {Removal of humic substances by electrocoagulation (EC) process and characterization of floc size growth mechanism under optimum conditions},
  journal = {SEPARATION AND PURIFICATION TECHNOLOGY},
  year = {2014},
  volume = {133},
  pages = {246--253},
  doi = {10.1016/j.seppur.2014.07.003}
}
Turkay O, Man H and Dimoglo A (2014), "Experimental and theoretical investigations of CuO-catalyzed ozonation of humic acid", SEPARATION AND PURIFICATION TECHNOLOGY. Vol. 134, pp. 110-116.
Abstract: In this study, the efficiency of copper oxide (CuO) as a catalyst in the
ozonation process of humic acid (HA) was investigated in both
experimental and theoretical respects. Ozonation and catalytic ozonation
processes were conducted in a lab setting. HA concentration was
determined by measurement of the surrogate organic parameters. The
results show that the degradation of HA by catalytic ozonation in the
presence of CuO was found to be much more effective than the ozonation
process alone. The experimental data was verified by means of
theoretical modeling. Density Function Theory (DFT) was used to
calculate the decomposition of ozone in the catalytic processes. The
reactions on the surface of metal oxides were evaluated with
quantum-chemical calculations to explain the mechanisms of catalytic
ozonation. Two models of adsorption were investigated: when only O-3 is
attached to the surface and when O-3 and H2O are simultaneously adsorbed
by the active center of catalyst. Each is a barrierless reaction, as
follows from the calculations mentioned. The result of the first
reaction is one oxygen molecule and atomic oxygen being adsorbed on the
CuO surface. The second reaction's final products are O-2 and
hydroxyl-radicals, which are adsorbed on the CuO surface. These
particles behave as powerful oxidizing agents in the further reactions
with HA. Comparison of the two mechanisms shows that the second reaction
with the water molecule participation is preferable to the first one
based on energy levels. (C) 2014 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000342532100013,
  author = {Turkay, Ozge and Man, Hatice and Dimoglo, Anatoli},
  title = {Experimental and theoretical investigations of CuO-catalyzed ozonation of humic acid},
  journal = {SEPARATION AND PURIFICATION TECHNOLOGY},
  year = {2014},
  volume = {134},
  pages = {110--116},
  doi = {10.1016/j.seppur.2014.07.040}
}
Inan H, Turkay O and Akkiris C (2014), "Microwave and microwave-alkali effect on barley straw for total sugar yield", INTERNATIONAL JOURNAL OF GLOBAL WARMING. Vol. 6(2-3, SI), pp. 212-221.
Abstract: Lignocellulose is the most remarkable plant material resource for
obtaining energy; however, its utility is restrained by its recalcitrant
structure. Therefore, it is necessary to apply a convenient pretreatment
method to increase the sugar yield. Microwave pretreatment method
assists to break down hard lignin structure for improved degradation of
cellulose and releasing of sugar. The objectives of this study are to
investigate microwave and microwave-alkali pretreatment efficiency of
barley straw before enzymatic hydrolysis. In both pretreatment methods,
remarkable findings were obtained as sugar concentration. The maximum
reducing total sugar concentration of 354.1 mg/L was achieved after ten
minutes of pretreatment time in 30 mL of 3% NaOH solution (w/v) at
microwave power of 200 W. The evaluations of scanning electron
microscopy (SEM) images were carried out within pretreatment of barley
straw as well. The results suggest that microwave and microwave-alkali
pretreatment can increase total sugar concentration.
BibTeX:
@article{ISI:000344364800007,
  author = {Inan, H and Turkay, O and Akkiris, C},
  title = {Microwave and microwave-alkali effect on barley straw for total sugar yield},
  journal = {INTERNATIONAL JOURNAL OF GLOBAL WARMING},
  year = {2014},
  volume = {6},
  number = {2-3, SI},
  pages = {212--221},
  doi = {10.1504/IJGW.2014.061011}
}
Celen M, Karpuzcu M, Engin GO, Tetzlaff B and Wendland F (2014), "Modelling total phosphorus input pathways in the Porsuk reservoir catchment in Turkey", ENVIRONMENTAL EARTH SCIENCES. Vol. 72(12, SI), pp. 5019-5034.
Abstract: As a country in the Mediterranean region, Turkey must face the effects
of climate change on water quality and quantity. Decision support
systems are accepted as useful and practical tools for the protection
and management of water resources. The need for such tools is rapidly
emerging in conjunction with industrial developments in Turkey. Against
this background, the empirical area-differentiated phosphorus model
MEPhos developed for the mid-European site conditions was transferred
and adapted for a representative study area in Turkey, the Porsuk
reservoir catchment. Adaption included the development of a model
approach to consider the P input into surface waters from septic tanks.
For this purpose, several field campaigns were carried out to define
characteristic P emission coefficients for septic tanks. In addition,
the soil phosphorus content of the top soil was defined to generate
reliable input data for the modelling of the P input into surface water
via soil erosion in agricultural areas. According to the MEPhos model
results, mean annual phosphorous loads of all types of point sources
dominate with a percentage of around 57 %. Erosion contributes to 40 %
of the total P load and displays the most significant diffuse input
pathway. The validation studies conducted between 2007 and 2011 showed a
satisfying agreement with the observed values. After validation, the
efficiency of measures to reduce P inputs into the Porsuk reservoir was
analysed. It was found that most measures to prevent soil erosion seem
to be appropriate, whereas measures to reduce P input from point sources
seem to be less efficient.
BibTeX:
@article{ISI:000345407000025,
  author = {Celen, M and Karpuzcu, M and Engin, G Onkal and Tetzlaff, B and Wendland, F},
  title = {Modelling total phosphorus input pathways in the Porsuk reservoir catchment in Turkey},
  journal = {ENVIRONMENTAL EARTH SCIENCES},
  year = {2014},
  volume = {72},
  number = {12, SI},
  pages = {5019--5034},
  doi = {10.1007/s12665-014-3371-x}
}
Ozkan M, Celik MA, Karagoz P, Yilmaz H and Sengezer C (2014), "Activity of Bdellovibrio on Sludge bacteria and its potential use for cleaning of Membrane Bioreactors", NEW BIOTECHNOLOGY. Vol. 31(S), pp. S133.
BibTeX:
@article{ISI:000347298600328,
  author = {Ozkan, Melek and Celik, Merve Akay and Karagoz, Pinar and Yilmaz, Hilal and Sengezer, Cisel},
  title = {Activity of Bdellovibrio on Sludge bacteria and its potential use for cleaning of Membrane Bioreactors},
  journal = {NEW BIOTECHNOLOGY},
  year = {2014},
  volume = {31},
  number = {S},
  pages = {S133},
  doi = {10.1016/j.nbt.2014.05.1941}
}
Topkaya E, Konyar M, Yatmaz HC and Ozturk K (2014), "Pure ZnO and composite ZnO/TiO2 catalyst plates: A comparative study for the degradation of azo dye, pesticide and antibiotic in aqueous solutions", JOURNAL OF COLLOID AND INTERFACE SCIENCE. Vol. 430, pp. 6-11.
Abstract: Photocatalytic degradations of azo dye (RR 180), pesticide (2,4-D) and
antibiotic (enrofloxacin) in aqueous solutions were performed and
compared by using pure ZnO and ZnO/TiO2 composite (at 1:1 ZnO to TiO2
mole ratio) catalysts in a self-supporting plate form. The plates were
produced by tape casting of the constituent powder slurries and
sintering at 600 degrees C. Photocatalytic degradations of these
pollutants were carried out under UVA and UVC irradiations for 120 min.
Maximum degradation was obtained for 2,4-D solution using pure ZnO
plates under UVC. Due to the photolysis effect, UVC wavelength yielded
higher efficiency values for all the chemicals than UVA. The discrepancy
in the photocatalytic performances of the pure ZnO and the ZnO/TiO2
composite plates were not found to be significant. The plates were found
to be effective for the consecutive degradation tests which indicated
their potentiality in extended applications. (C) 2014 Elsevier Inc. All
rights reserved.
BibTeX:
@article{ISI:000348689100002,
  author = {Topkaya, Eylem and Konyar, Mehmet and Yatmaz, H Cengiz and Ozturk, Koray},
  title = {Pure ZnO and composite ZnO/TiO2 catalyst plates: A comparative study for the degradation of azo dye, pesticide and antibiotic in aqueous solutions},
  journal = {JOURNAL OF COLLOID AND INTERFACE SCIENCE},
  year = {2014},
  volume = {430},
  pages = {6--11},
  doi = {10.1016/j.jcis.2014.05.022}
}
Engin GO, Gurbulak E, Celen M, Ulu F and Oncel MS (2014), "NUTRIENT MODELLING IN COASTAL WATERS OF IZMIT BAY, TURKEY", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 23(12B), pp. 3345-3352.
Abstract: The ECOLab module of the MIKE 3 model based on the coupling between a
hydrodynamic part and an ecological part which accounts for mainly the
nutrient enrichment was utilized to study nutrient cycles and their
contribution to eutrophication in the Izmit Bay located in the Sea of
Marmara. The water quality data, including on-site parameters, produced
between November 2005 and November 2006 were used for model runs and
validation. The samples were collected from 8 different points on the
cross-section of the bay at different depths considering the bottom
point of the sea bed in order to represent the third dimension. The
ecological model used in this study allows creating 3D images/results
that simulate the actual situation. The spatial distribution of state
variables such as, dissolved Biological Oxygen Demand (BODd), dissolved
oxygen (DO), ammonia, nitrate and nitrite, and phosphate concentrations
were investigated. The processes, used as arguments in the differential
equations involved in ECOLab, were advective dispersive transport,
biological, chemical and physical transformation process and settling.
According to the model results, the discharges of main streams have a
big influence on the variation of the BOD, especially in the coastal and
shallow regions. Additionally, the modelled ammonia, nitrate and
phosphate concentrations were determined at the discharge points of the
four main streams reaching the bay.
BibTeX:
@article{ISI:000348744900013,
  author = {Engin, Guleda Onkal and Gurbulak, Ercan and Celen, Meltem and Ulu, Feride and Oncel, Mehmet Salim},
  title = {NUTRIENT MODELLING IN COASTAL WATERS OF IZMIT BAY, TURKEY},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2014},
  volume = {23},
  number = {12B},
  pages = {3345--3352}
}
Koseoglu-Imer DY and Keskinler B (2013), "Immobilization of Acidithiobacillus ferrooxidans on sulfonated microporous poly(styrene-divinylbenzene) copolymer with granulated activated carbon and its use in bio-oxidation of ferrous iron", MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS. Vol. 33(1), pp. 53-58.
Abstract: The immobilization efficiencies of Acidithiobacillus ferrooxidans cells
on different immobilization matrices were investigated for biooxidation
of ferrous iron (Fe2+) to ferric iron (Fe3+). Six different matrices
were used such as the polyurethane foam (PUF), granular activated carbon
(GAC), raw poly(styrene-divinylbenzene) copolymer (rawSDVB), raw
poly(styrene-divinylbenzene) copolymer with granular activated carbon
(rawSDVB-GAC), sulfonated poly(styrene-divinylbenzene) copolymer
(sulfSDVB) and sulfonated poly(styrene-divinylbenzene) copolymer with
granular activated carbon (sulfSDVB-GAC). The sulfSDVB-GAC polymer
showed the best performance for Fe2+ biooxidation. It was used at
packed-bed bioreactor and the kinetic parameters were obtained. The
highest Fe2+ biooxidation rate (R) was found to be 4.02 g/L h at the
true dilution rate (D-t) of 2.47 1/h and hydraulic retention time (tau)
of 0.4 h. The sulfSDVB-GAC polymer was used for the first time as
immobilization material for A. ferrooxidans for Fe2+ biooxidation. (c)
2012 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000313155500007,
  author = {Koseoglu-Imer, Derya Yuksel and Keskinler, Bulent},
  title = {Immobilization of Acidithiobacillus ferrooxidans on sulfonated microporous poly(styrene-divinylbenzene) copolymer with granulated activated carbon and its use in bio-oxidation of ferrous iron},
  journal = {MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS},
  year = {2013},
  volume = {33},
  number = {1},
  pages = {53--58},
  doi = {10.1016/j.msec.2012.08.003}
}
Koseoglu-Imer DY, Kose B, Altinbas M and Koyuncu I (2013), "The production of polysulfone (PS) membrane with silver nanoparticles (AgNP): Physical properties, filtration performances, and biofouling resistances of membranes", JOURNAL OF MEMBRANE SCIENCE. Vol. 428, pp. 620-628.
Abstract: The polysulfone (PS) membranes were prepared by adding different amounts
of silver nanoparticle-AgNP (0-1 wt%) into the dope solution. The bare
PS and AgNP entrapped PS membranes (AgNP-PS composite membrane) were
tested for physical properties with water permeability, MWCO (molecular
weight cut-off), AFM, contact angle and SEM analyses, filtration
performances by using the model protein (BSA) and carbohydrate (dextran)
solutions and biofouling resistances by using a real activated sludge.
AgNP addition improved the protein and carbohydrate filtration
performances of bare PS membrane. The results of biofouling experiments
showed the AgNP-PS composite membranes having lower absorptive and pore
fouling values than bare PS membrane. The ionic silver loss from
membrane during pure water filtration was measured using
inductive-coupled plasma spectrometer (ICP) and the results showed the
minimum silver loss from the composite membranes. The results of disk
diffusion test showed that the composite AgNP-PS membranes decreased the
growth of bacterial colonies. However PCR-DGEE technique showed that
there were not significant differences in microbial community population
density along the bare and composite membranes. (C) 2012 Elsevier B.V.
All rights reserved.
BibTeX:
@article{ISI:000313653700069,
  author = {Koseoglu-Imer, Derya Y and Kose, Borte and Altinbas, Mahmut and Koyuncu, Ismail},
  title = {The production of polysulfone (PS) membrane with silver nanoparticles (AgNP): Physical properties, filtration performances, and biofouling resistances of membranes},
  journal = {JOURNAL OF MEMBRANE SCIENCE},
  year = {2013},
  volume = {428},
  pages = {620--628},
  doi = {10.1016/j.memsci.2012.10.046}
}
Ince M (2013), "Treatment of Manganese-Phosphate Coating Wastewater by Electrocoagulation", SEPARATION SCIENCE AND TECHNOLOGY. Vol. 48(3), pp. 515-522.
Abstract: The effective performance of the electrocoagulation (EC) technique in
removing manganese, phosphate, and iron from rinse water from a Mn-PO4
(MPO) coating plant was investigated using sacrificial aluminum
electrodes in original pH. It was found that an increase in the current
enhanced the speed of the removal significantly. However, simultaneous
increase of electrode and energy consumption was observed. The optimum
current density allowing the quickest treatment with a low cost was
found to be 20 A m-2. In 20 A m-2, the process produces a removal
capacity of 97.95% of manganese, 99.96% of phosphate, and 99.78% of
iron, just after 30 min. The energy and electrode consumptions were
determined to be 2.294 kWh m-3 and 5.584 kg m-3 of treated rinse water
at the end of process, respectively. Additionally, three different
electrode connection modes (MP-P, MP-S, and BP-S) were examined in
choosing a better alternative in order to intensify the performance of
the process. MP-P electrode connection mode was found to be a suitable
configuration in consideration of removal efficiency, energy, and
electrode consumptions.
BibTeX:
@article{ISI:000313681000017,
  author = {Ince, Mahir},
  title = {Treatment of Manganese-Phosphate Coating Wastewater by Electrocoagulation},
  journal = {SEPARATION SCIENCE AND TECHNOLOGY},
  year = {2013},
  volume = {48},
  number = {3},
  pages = {515--522},
  doi = {10.1080/01496395.2012.690125}
}
Yuksel E, Eyvaz M and Gurbulak E (2013), "Electrochemical treatment of colour index reactive orange 84 and textile wastewater by using stainless steel and iron electrodes", ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY. Vol. 32(1), pp. 60-68.
Abstract: In this study, two case studies were carried out: Electrocoagulation
(EC) of a reactive textile dye solution and a textile wastewater.
Stainless steel (SS) and iron (Fe) electrodes were used as sacrificial
electrodes in parallel connection modes. Effects of pH, current density,
and operating time on performance of EC were investigated. Optimum
parameters obtained from dye experiments were applied to treatment of
the textile wastewater. According to the experimental results, SS
electrodes were found to be superior compared with Fe electrodes for
treatment of both the dye and the textile wastewater. By using SS
electrodes, the textile wastewater was electrocoagulated successfully
with 89.7% of COD, 91.2% of TOC, 90.3% of turbidity, and 94.1% of
TSS removal efficiencies as well as 2.43 kWh/m3 of energy and 0.05 kg/m3
of electrode consumptions, 1.061 kg/m3 of sludge production, and 0.62
/m3 of total operating cost. (c) 2011 American Institute of Chemical
Engineers Environ Prog, 32: 6068, 2013.
BibTeX:
@article{ISI:000313778300006,
  author = {Yuksel, Ebubekir and Eyvaz, Murat and Gurbulak, Ercan},
  title = {Electrochemical treatment of colour index reactive orange 84 and textile wastewater by using stainless steel and iron electrodes},
  journal = {ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY},
  year = {2013},
  volume = {32},
  number = {1},
  pages = {60--68},
  doi = {10.1002/ep.10601}
}
Aydiner C, Topcu S, Tortop C, Kuvvet F, Ekinci D, Dizge N and Keskinler B (2013), "A novel implementation of water recovery from whey: ``forward-reverse osmosis'' integrated membrane system", DESALINATION AND WATER TREATMENT. Vol. 51(4-6), pp. 786-799.
Abstract: As a result of its emerging contribution to water recovery and clean
water production, forward osmosis (FO) in integrated membrane system has
recently especially been preferred by research communities on membrane
science and desalination technology. In this study, the effectiveness of
FO reverse osmosis (RO) integrated membrane system in whey dewatering
was investigated in laboratory scale experiments in which FO and RO were
utilized for whey concentration and water recovery, respectively. FO
experiments were carried out at different conditions of cross-flow rate,
temperature, membrane kind, membrane orientation mode, and
microfiltration (MF) pretreatment. A single-step RO system was applied
for water recovery from the FO draw solution. In the FO process, about
1.6 L water of 3 L whey was withdrawn into 3 M NaCl draw solution during
6 h operating time, and a sufficiently high performance in whey
concentration was obtained, with the solid content being increased from
6.8 to 14.3%. However, the process resulted in a high salt permeation
into the whey, in addition to some soluble organics being permeated into
the draw. RO process are operated with relatively low performances due
to excessive salt concentration of the FO draw solutions, which
indicates that there is a need for RO implementation in two or three
sequential levels for achieving an absolute success in the water
recovery from whey. Despite the fact that MF pretreatment to some extent
decreased the FO performance, it could be used for directly productive
activities intended to recover fats from whey. Results have proved that
prior to whey powder production, the integrated system could be
effectively employed for whey concentrations up to a solid content of
25-35%. Accordingly, FO-RO system can be utilized as a novel
alternative in concentrating whey compared to ultrafiltration-RO
combined system widely used worldwide. However, before practical
implementation of the system, an optimization between alleviating the
salt concentration in FO draw and multi-step RO implementation should
have to be considered concurrently with the economics of the investment.
BibTeX:
@article{ISI:000313794400015,
  author = {Aydiner, Coskun and Topcu, Semra and Tortop, Caner and Kuvvet, Ferihan and Ekinci, Didem and Dizge, Nadir and Keskinler, Bulent},
  title = {A novel implementation of water recovery from whey: ``forward-reverse osmosis'' integrated membrane system},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2013},
  volume = {51},
  number = {4-6},
  pages = {786--799},
  doi = {10.1080/19443994.2012.693713}
}
Bayar S and Talinli I (2013), "Solidification/stabilization of hazardous waste sludge obtained from a chemical industry", CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY. Vol. 15(1), pp. 157-165.
Abstract: In this study, treatment sludge obtained from a chemical-metal finishing
industry, which contained potentially toxic heavy metals and organics,
was characterized, and the performance of the
solidification/stabilization (S/S) of the sludge was discussed. The
hazard characteristics of the waste were determined by means of
extraction procedure toxicity test and DIN 38414-S4 Test, as defined in
both Turkish and USEPA regulations. S/S studies were conducted using
Portland cement to solidify the sludge containing high concentrations of
total organic carbon, Cr, Cu, Hg, Ni, Pb, and Zn. The waste/binder
ratios of 36 sludge specimens were kept between 0/100 and 40/100. The
specimens were cured at room temperature for 7, 28, and 90 days. The
compressive strengths of the specimens were measured to determine the
feasibility of using solidified waste sludge as construction materials.
The compressive strength values indicated that specimens could be
potentially used as construction materials. The heavy metal and organic
contents of the extracts of each specimen were detected in
concentrations which were lower than the standard concentrations in
EPTox and DIN 38414-S4 leaching procedures for the most part.
BibTeX:
@article{ISI:000314270100016,
  author = {Bayar, Senem and Talinli, Ilhan},
  title = {Solidification/stabilization of hazardous waste sludge obtained from a chemical industry},
  journal = {CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY},
  year = {2013},
  volume = {15},
  number = {1},
  pages = {157--165},
  doi = {10.1007/s10098-012-0494-1}
}
Dizge N, Koseoglu-Imer DY, Karagunduz A and Keskinler B (2013), "Effect of sludge retention time on membrane bio-fouling using different type and pore size of membranes in a submerged membrane bioreactor", WATER SCIENCE AND TECHNOLOGY. Vol. 67(3), pp. 604-611.
Abstract: The objective of this study was to investigate the influence of sludge
retention time (SRT) on membrane bio-fouling. An activated sludge
reactor was operated at three different SRTs (10, 30, and 50 days).
Submerged membrane experiments were performed when the mixed liquor
suspended solids (MLSS) concentration reached the steady state
conditions. MLSS concentrations reached the steady state at 3,109+/-194,
6,209+/-123 and 6,609+/-280 mg/L for SRTs of 10, 30 and 50 days,
respectively. The total soluble microbial products (SMP) were
20.1+/-3.7, 16.2+/-7.2 and 28.2+/-8.4 mg/L at SRTs of 10, 30, and 50
days, respectively. The carbohydrate concentration in the supernatant
was about two times more for SRT of 10 days than that for 50 days. The
total amount of extracellular polymeric substances (EPS) extracted from
the flocs were approximately 74.9+/-11.9, 67.8+/-15.0 and 67.5+/-17.4
mg/g MLSS at three SRTs (10, 30, and 50 days) under the same organic
loading rate. The viscosity of the biomass increased with the increasing
SRT. The results of flux stepping tests showed that the membrane fouling
at SRT 10 days was always higher than that of 30 and 50 days. Four
different microfiltration membranes (cellulose acetate,
polyethersulfone, mixed ester, and polycarbonate) with three different
pore sizes (0.45, 0.22, 0.10 mu m) were tested. Filtration resistances
were determined for each membrane. Cake resistance was observed to be
the most significant fouling mechanism for all membranes.
BibTeX:
@article{ISI:000315194500019,
  author = {Dizge, Nadir and Koseoglu-Imer, Derya Y and Karagunduz, Ahmet and Keskinler, Bulent},
  title = {Effect of sludge retention time on membrane bio-fouling using different type and pore size of membranes in a submerged membrane bioreactor},
  journal = {WATER SCIENCE AND TECHNOLOGY},
  year = {2013},
  volume = {67},
  number = {3},
  pages = {604--611},
  doi = {10.2166/wst.2012.607}
}
Senturk E, Ynce M and Onkal Engin G (2013), "Assesment of Kinetic Parameters for Thermophilic Anaerobic Contact Reactor Treating Food-Processing Wastewater", INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH. Vol. 7(2), pp. 293-302.
Abstract: A thermophilic anaerobic contact reactor for the treatment of
potato-processing wastewaters was designed as a continuous-flow,
completely-mixed homogeneous system. The reactor was operated at ten
different organic loading rates ranging from 0.84 g COD/L.d to 7.00 g
COD/L.d for a duration of approximately 250 days. The fundamental way to
maintain optimum operating conditions of anaerobic digestion systems is
to have a well acquaintance with the dynamic behaviours of the process.
For this purpose, different types of kinetic models were used in this
study, namely the substrate balance, the maximum / specific substrate
utilization rate and the methane production rate models. The
experimental data obtained indicated that the models used were all
applicable for the description of bio-kinetic behaviour of the
thermophilic anaerobic contact reactor.
BibTeX:
@article{ISI:000315975900003,
  author = {Senturk, E and Ynce, M and Onkal Engin, G},
  title = {Assesment of Kinetic Parameters for Thermophilic Anaerobic Contact Reactor Treating Food-Processing Wastewater},
  journal = {INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH},
  year = {2013},
  volume = {7},
  number = {2},
  pages = {293--302}
}
Ozoner SK, Erhan E, Yilmaz F, Ergenekon P and Anil I (2013), "Electrochemical biosensor for detection of formaldehyde in rain water", JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. Vol. 88(4), pp. 727-732.
Abstract: BACKGROUD: This study describes the construction of an electrochemical
formaldehyde biosensor based on poly(glycidyl
methacrylate-co-3-methylthienyl methacrylate)/formaldehyde
dehydrogenase/polypyrrole [poly(GMA-co-MTM)/FDH/PPy] composite film
electrode. Formaldehyde dehydrogenase (FDH) was chemically immobilized
via the epoxy groups of the glycidyl methacrylate (GMA) side chain of
the polymer. Formaldehyde measurements were conducted in 0.1 mol L1, pH
8 phosphate buffer solution (PBS) including 0.1 mol L1 KCl, 0.5 mmol L1
of NAD+ (cofactor of the enzyme) and 1 mmol L1 of
1,2-napthoquinone-4-sulfonic acid sodium salt (NQS) as mediator with an
applied potential of 0.23 V (vs. Ag/AgCl, 3 mol L1 NaCl). Analytical
parameters of the biosensor were calculated and discussed. The biosensor
was tested in rain water samples. RESULTS: Sensitivity was found to be
15 000 per mmol L1 (500 nA ppm1) in a linear range between 0.1 ppm and 3
ppm (3.3100 mu mol L1). A minimum detectable concentration of 4.5 ppb
(0.15 mu mol L1) (S/N = 3) with a relative standard deviation (RSD) of
0.73% (n = 5) was obtained from the biosensor. Response time of the
biosensor was very short, reaching 99% of its maximum response in about
4 s. The biosensor was also tested for formaldehyde measurements in rain
water samples. Formaldehyde concentrations in samples were calculated
using the proposed biosensor with recovery values ranged between 92.2
and 97.7% in comparison with the colorimetric Nash method. CONCLUSION:
The poly(GMA-co-MTM)/FDH/PPy) electrode showed excellent measurement
sensitivity in comparison with other formaldehyde biosensor studies.
Strong chemical bonding between the enzyme and the copolymer was created
via the epoxy groups of the composite film. The proposed biosensor could
be used successfully in rain waters without a pretreatment step. (c)
2012 Society of Chemical Industry
BibTeX:
@article{ISI:000316627600027,
  author = {Ozoner, Seyda Korkut and Erhan, Elif and Yilmaz, Faruk and Ergenekon, Pinar and Anil, Ismail},
  title = {Electrochemical biosensor for detection of formaldehyde in rain water},
  journal = {JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY},
  year = {2013},
  volume = {88},
  number = {4},
  pages = {727--732},
  doi = {10.1002/jctb.3896}
}
Kara S (2013), "Treatment of transport container washing wastewater by electrocoagulation", ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY. Vol. 32(2), pp. 249-256.
Abstract: In this study, the effects of operational parameters such as initial pH,
current density, and electrolysis time on the treatment of transport
container washing wastewater by electrocoagulation (EC) with aluminum
(Al) and iron (Fe) electrodes were investigated separately. Chemical
oxygen demand (COD), turbidity and color were used to measure the
treatment efficiency. Energy consumptions were calculated per cubic
meter of wastewater. Amount of sludge produced after EC was also
reported per cubic meter of wastewater. Different direct and indirect
cost items including energy, sacrificial electrodes, labor, sludge
handling and disposal, maintenance, and depreciation costs have been
considered in the calculation of the total operating cost, and it was
calculated as per cubic meter of wastewater and per kilograms of COD
removed. The total operating costs were acquired as 11.2 m3 with
79.45% of COD, 99.71% of color, and 99.45% of turbidity removal
efficiencies by Fe electrodes and 23.89 m3 with 76.31% of COD,
99.05% of color, and 99.77% of turbidity removal efficiencies by Al
electrodes under the optimum parameters in this study. In addition, the
optimum operating times were found as 30 min for Fe electrodes and 60
min for Al electrodes. (c) 2012 American Institute of Chemical Engineers
Environ Prog, 32: 249-256, 2013
BibTeX:
@article{ISI:000317851600012,
  author = {Kara, Serdar},
  title = {Treatment of transport container washing wastewater by electrocoagulation},
  journal = {ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY},
  year = {2013},
  volume = {32},
  number = {2},
  pages = {249--256},
  doi = {10.1002/ep.11616}
}
Koseoglu-Imer DY (2013), "The determination of performances of polysulfone (PS) ultrafiltration membranes fabricated at different evaporation temperatures for the pretreatment of textile wastewater", DESALINATION., may, 2013. Vol. 316, pp. 110-119.
Abstract: The effects of evaporation temperature on properties and filtration
performances of polysulfone membrane were investigated with a series of
experiments. Membranes were fabricated by phase inversion process at
five different evaporation temperatures (25 +/- 0.4, 35 +/- 0.6, 45 +/-
0.5, 55 +/- 0.5 and 65 +/- 0.6 degrees C). The resulted membranes were
characterized by water permeability, MWCO (molecular weight cut-off),
AFM, porosity, contact angle and SEM analyses and tested for filtration
performances by using a model dye solution (reactive orange 16-RO16) and
a real dye-bath textile wastewater. The pore size and density onto the
membrane surface become smaller and the surface roughness, porosity,
permeability and MWCO values of membranes considerably decreased with
the increasing of evaporation temperature. At the pretreatment
filtration experiments, the flux values of membranes decreased largely
with the increase of the evaporation temperature while the removal
efficiencies for color, COD and conductivity parameters increased. At
the membrane fouling analysis, the flux reduction ratios (FRR), the
filtration (R-t) and fouling (R-f) resistances and the reusable
performances of membrane changed directly proportional with roughness,
porosity and pore size characteristics of membranes. At the
nanofiltration step (NF-270 membrane), the moderate color, chemical
oxygen demand (COD) and conductivity removal were showed at permeate of
PS-65 membrane (the membrane fabricated at 65 +/- 0.6 degrees C). (C)
2013 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000317945300014,
  author = {Koseoglu-Imer, Derya Y},
  title = {The determination of performances of polysulfone (PS) ultrafiltration membranes fabricated at different evaporation temperatures for the pretreatment of textile wastewater},
  journal = {DESALINATION},
  year = {2013},
  volume = {316},
  pages = {110--119},
  doi = {10.1016/j.desal.2013.02.011}
}
Senturk E, Ince M and Engin GO (2013), "The effect of transient loading on the performance of a mesophilic anaerobic contact reactor at constant feed strength", JOURNAL OF BIOTECHNOLOGY. Vol. 164(2), pp. 232-237.
Abstract: Anaerobic contact reactor is a high rate anaerobic process consisting of
an agitated reactor and a solids settling tank for recycling. It was
proved earlier that this type of reactor design offers highly efficient
performance in the conversion of organic matter to biogas. In this
study, the effect of transient loading on reactor performance in terms
of a number of key intermediates and parameters such as, COD removal, pH
and alkalinity change, VFAs, effluent MLSS concentration and biogas
efficiency over time was examined. For this purpose, a step increase of
organic loading rate from 335 kg COD/m(3) day to 15.61 kg COD/m(3) day
was employed. The hydraulic retention time decreased to a value of 8.42
h by an increase in the influent flow-rate during the transient loading.
It was observed that the mesophilic anaerobic contact reactor (MACR) was
quite resistant to large transient shocks. The reactor recovered back to
its baseline performance only in 15 h after the shock loading was
stopped. Hence, it can be concluded that this type of reactor design has
a high potential in treating food processing wastewaters with varying
flow characteristics. (C) 2012 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000317995800008,
  author = {Senturk, Elif and Ince, Mahir and Engin, Guleda Onkal},
  title = {The effect of transient loading on the performance of a mesophilic anaerobic contact reactor at constant feed strength},
  journal = {JOURNAL OF BIOTECHNOLOGY},
  year = {2013},
  volume = {164},
  number = {2},
  pages = {232--237},
  doi = {10.1016/j.jbiotec.2012.08.016}
}
Akar N, Asar B, Dizge N and Koyuncu I (2013), "Investigation of characterization and biofouling properties of PES membrane containing selenium and copper nanoparticles", JOURNAL OF MEMBRANE SCIENCE. Vol. 437, pp. 216-226.
Abstract: Selenium and copper nanoparticles exhibit superior antioxidant activity,
unique properties, and great potential applications that make them very
attractive for developing new composite materials. In this study,
polyethersulfone (PES) ultrafiltration membrane was modified by
dispersing nano-sized selenium (nSe) and copper (nCu) particles
uniformly in a PES solution (18% polymer weight) and casted by a phase
inversion process. Membranes with four different weight ratios of nSe
and nCu to PES of 0.002, 0.010, 0.030, and 0.050 were tested. Selenium
nanoparticles were prepared by the reduction of aqueous sodium selenite
solution with freshly prepared glucose solution. The method was capable
of producing spherical selenium nanoparticles in a size range of about
150-175 nm, under ambient conditions. The synthesized nanoparticles can
be separated easily from the aqueous solutions by a high-speed
centrifuge and can be re-dispersed in an aqueous medium by an
ultra-sonicator. The effects of temperature, time, and stirring rate on
the size of the selenium nanoparticles were studied. In addition,
nanoscale particles of metallic copper clusters were prepared by
sonochemical reduction of copper(II) hydrazine carboxylate
Cu-(N2H3COO)(2) center dot 2H(2)O complex in an aqueous medium.
Reduction process takes place under an argon atmosphere over a period of
2-3 h and the size of copper nanoparticles was about 90-105 nm. The
synthesized selenium and copper nanoparticles were characterized by
X-ray diffraction (XRD), transmission electron microscopy (TEM), and
particle size distribution techniques. Moreover, Se/PES and Cu/PES blend
membranes were also characterized using contact angle goniometer,
scanning electron microscopy (SEM), and permeation tests. Anti-fouling
performance was examined using activated sludge as a biological
suspension. The protein rejection study was also carried out using the
bovine serum albumin (BSA) solution. The morphology and permeation
properties of the blend membranes were found to be dependent on the
amounts of nanoparticles. Compared to neat PES membrane, the 0.05 Cu/PES
membrane exhibited highest protein rejection ratio (86.3%). However,
the Se/PES membranes showed better antifouling performance (lower flux
decline). The blending membranes with nanoparticles are considered to be
suitable for the prevention of biofouling. (c) 2013 Elsevier B.V. All
rights reserved.
BibTeX:
@article{ISI:000319117000026,
  author = {Akar, Nuri and Asar, Berrin and Dizge, Nadir and Koyuncu, Ismail},
  title = {Investigation of characterization and biofouling properties of PES membrane containing selenium and copper nanoparticles},
  journal = {JOURNAL OF MEMBRANE SCIENCE},
  year = {2013},
  volume = {437},
  pages = {216--226},
  doi = {10.1016/j.memsci.2013.02.012}
}
Ince M, Senturk E, Engin OG and Keskinler B (2013), "Landfill Leachate Treatment in Jet-Loop Membrane Bioreactor Operated Under Different Organic Loading Rates", INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH. Vol. 7(3), pp. 827-834.
Abstract: Since treatment of landfill leachate is quite complicated, there is a
need to develop a system that is capable of providing high treatment
efficiencies. In this study, the treatment performance of a jet - loop
membrane bioreactor (JLMB) operated at different organic loading rates
was investigated by observing the changes in Chemical Oxygen Demand
(COD), Total Kjehidahl Nitrogen (TKN) and Total Ammonia (NH3)
concentrations. The same COD removal rates (83%) were observed at all
the studied loading rates, and it should be noted that the biodegradable
part of the leachate was removed completely. It was also observed that
the NH4 - N / TKN ratios, which were found to be approximately 0.9, did
not change throughout the study. However, further treatment
technologies, such as reverse osmosis, nanofiltration or ion - exchange,
should be employed for the complete removal of inert COD and NH3 in
order to meet related discharge limits.
BibTeX:
@article{ISI:000319952600021,
  author = {Ince, M and Senturk, E and Engin, Onkal G and Keskinler, B},
  title = {Landfill Leachate Treatment in Jet-Loop Membrane Bioreactor Operated Under Different Organic Loading Rates},
  journal = {INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH},
  year = {2013},
  volume = {7},
  number = {3},
  pages = {827--834}
}
Akyol A, Can OT, Demirbas E and Kobya M (2013), "A comparative study of electrocoagulation and electro-Fenton for treatment of wastewater from liquid organic fertilizer plant", SEPARATION AND PURIFICATION TECHNOLOGY. Vol. 112, pp. 11-19.
Abstract: Treatments of the liquid organic fertilizer manufacturing wastewater
(LFW) by electrocoagulation (EC) and electro-Fenton (EF) processes using
iron electrodes were carried out in a batch electrolytic reactor.
Effects of operating conditions such as current density and initial pH,
for the EC process, and current density and initial H2O2 concentration
for the EF process on removal efficiencies of total organic carbon
(TOC), chemical oxygen demand (COD), color and total phosphate (TP) were
investigated. Removal efficiencies of 79% for TOC, 83% for COD, 73%
for TP and 95% for color from the EC process at the optimum operating
conditions (50 A/m(2), 45 mm and pH(i) 6) and 87% for TOC, 91% for
COD, 96% for TP and 99% for color from the EF process at the optimum
operating conditions (50 A/m(2), 45 min, 25 mM H2O2 and pH(i) 3)
respectively, were obtained. Operating costs for the EC and the EF
processes were calculated as 0.74 and 1.23 (sic)/m(3). As a comparison
from the obtained result, the EF process was found to be more effective
than the EC process with respect to the removal efficiencies of COD, TOC
and TP. However, the EF process was more expensive than the EC process.
(C) 2013 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000320295900002,
  author = {Akyol, Abdurrahman and Can, Orhan Taner and Demirbas, Erhan and Kobya, Mehmet},
  title = {A comparative study of electrocoagulation and electro-Fenton for treatment of wastewater from liquid organic fertilizer plant},
  journal = {SEPARATION AND PURIFICATION TECHNOLOGY},
  year = {2013},
  volume = {112},
  pages = {11--19},
  doi = {10.1016/j.seppur.2013.03.036}
}
Kaya Y, Ersan G, Vergili I, Gonder ZB, Yilmaz G, Dizge N and Aydiner C (2013), "The treatment of pharmaceutical wastewater using in a submerged membrane bioreactor under different sludge retention times", JOURNAL OF MEMBRANE SCIENCE. Vol. 442, pp. 72-82.
Abstract: The performance of a lab-scale submerged membrane bioreactor system
(SMBR) for treating a process wastewater containing the pharmaceutical
active compound (PhAc) etodolac with four different microfiltration (MF)
membranes (MP005, MV02, CA, and MCE) was investigated at three different
sludge retention times (SRTs) under constant pressure. In the first
phase of the study, the continuous bioreactor system was operated at
SRTs of 15 and 30 days and without sludge wasting (WSW). After steady
state conditions were reached, the SMBR process was started as the
second phase. Short-term filtration (24 h) tests were conducted for each
SRT. When the SRTs were increased, both permeate volumes and
steady-state flux values increased. The best etodolac removals were
obtained in case of WSW for both bioreactor system and SMBR. The
etodolac removals achieved by the different membranes for the period WSW
were observed in the following order: MV02 = MP005 textgreater CA = MCE. In
addition, the chemical oxygen demand (COD) removal efficiencies for
bioreactor system and SMBR were approximately 80 +/- 2% and 86 +/- 2%,
respectively, at all SRTs. The COD removals at each of the three SRTs
were similar for all of the membranes. Extracellular polymeric
substances (EPSs) and soluble microbial products (SMPs) were analyzed as
fouling control factors. Increasing the SRT caused increases in sludge
concentrations in the SMBR as well as in increased etodolac removal,
while EPS and SMP protein and carbohydrate concentrations decreased.
Fouling on the pores and surfaces of the membranes were characterized
using a Scanning Electron Microscope (SEM), an Atomic Force Microscope
(AFM), a Fourier transform infrared spectroscopy (FT-IR), and contact
angle measurements. The resistance in series model was used to evaluate
the flux decline caused by the gel layer, cake resistance, and internal
pore blocking in the MF membranes at the three different SRTs. (C) 2013
Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000320695100010,
  author = {Kaya, Yasemin and Ersan, Gamze and Vergili, Ilda and Gonder, Z Beril and Yilmaz, Gulsum and Dizge, Nadir and Aydiner, Coskun},
  title = {The treatment of pharmaceutical wastewater using in a submerged membrane bioreactor under different sludge retention times},
  journal = {JOURNAL OF MEMBRANE SCIENCE},
  year = {2013},
  volume = {442},
  pages = {72--82},
  doi = {10.1016/j.memsci.2013.03.059}
}
Buhan E, Dogan HM, Buhan SD, Ozdemir S, Polat F and Dogan CN (2013), "Investigating phosphorus and turbidity removal efficiencies of main aquatic vegetation species in the Lower Kelkit Basin of Turkey", TURKISH JOURNAL OF BOTANY. Vol. 37(4), pp. 744-752.
Abstract: In this study, we researched the main aquatic vegetation (AV) species
and their orthophosphate and turbidity removal efficiencies in the Lower
Kelkit Basin of Turkey. We chose an experimental area (1650 m(2)) in the
field and determined orthophosphate (mg/L) and turbidity (NTU) variables
at the charging and discharging points between November 2005 and March
2006. We also applied an experimental design including 9 treatments and
3 replications in aquarium conditions. Orthophosphate (mg/L) contents of
each aquarium were measured at 6 time periods (initial measurement and
days 1, 4, 9, 16, and 25). Ceratophyllum demersum L., Cladophora
glomerata (L.) Kutzing, Lemna minor L., Myriophyllum spicatum L.,
Nasturtium officinale R.Br., Potamogeton pectinatus L., Typha
angustifolia L., and Typha domingensis Pers. were determined as the main
AV species in the study area. Paired samples t-test results showed that
AV species significantly reduced both orthophosphate and turbidity in
the field conditions. Mean daily orthophosphate and turbidity removal
capacities of the wetland were determined as 0.13 mg/L and 2.82 NTU,
respectively. Analysis of variance and Duncan's honestly significant
difference results indicated that orthophosphate uptake efficiencies of
the plant species vary from 0.34 mg/L to 0.04 mg/L, and Lemna minor L.
and Ceratophyllum demersum L. are the most efficient species in aquarium
conditions.
BibTeX:
@article{ISI:000322924800016,
  author = {Buhan, Ekrem and Dogan, Hakan Mete and Buhan, Saliha Dirim and Ozdemir, Saim and Polat, Fatih and Dogan, Cisem Nildem},
  title = {Investigating phosphorus and turbidity removal efficiencies of main aquatic vegetation species in the Lower Kelkit Basin of Turkey},
  journal = {TURKISH JOURNAL OF BOTANY},
  year = {2013},
  volume = {37},
  number = {4},
  pages = {744--752},
  doi = {10.3906/bot-1209-21}
}
Kara S, Gurbulak E, Eyvaz M and Yuksel E (2013), "Treatment of winery wastewater by electrocoagulation process", DESALINATION AND WATER TREATMENT. Vol. 51(28-30), pp. 5421-5429.
Abstract: Winery wastewater treatment by electrocoagulation (EC) process using
aluminum (Al) and iron (Fe) electrodes was investigated. The effects of
operational parameters such as initial pH, current density and
electrolysis time were investigated separately. Chemical oxygen demand
(COD), turbidity and color were used to measure the treatment
efficiency. Electrode consumptions were calculated per m(3) of
wastewater. Amount of sludge produced by EC was also reported per m(3)
of wastewater. The optimum operating conditions were defined due to the
initial pH, applied current density and operating time for Fe and Al
electrodes. Maximum removal efficiencies were found at pH 7 for Fe
electrode and pH 5.2 for Al electrode with current density of 300A/m(2)
for both electrodes and with an operating time of 90min and 120min for
Fe and Al electrodes, respectively. The removal efficiencies were found
as 46.6% (COD), 80.3% (color) and 92.3% (turbidity) for Fe electrode
while they were 48.5% for COD, 97.2% for color and 98.6% for
turbidity when Al electrodes were used. Finally, the results were
compared with various food and beverage industry wastewaters treated by
EC process reported in the literature.
BibTeX:
@article{ISI:000323194300005,
  author = {Kara, Serdar and Gurbulak, Ercan and Eyvaz, Murat and Yuksel, Ebubekir},
  title = {Treatment of winery wastewater by electrocoagulation process},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2013},
  volume = {51},
  number = {28-30},
  pages = {5421--5429},
  doi = {10.1080/19443994.2013.770223}
}
Durak SG, Imer DYK, Demirkol GT, Ormanci T, Armagan B and Tufekci N (2013), "Influence of ageing on the catalytic activity of MnO2 sludge for oxidation of Mn(II)", DESALINATION AND WATER TREATMENT. Vol. 51(28-30), pp. 5692-5700.
Abstract: Manganese can be present in natural water in concentrations exceeding
10mg/l. If not treated well, Mn(II) ions can easily escape through the
water treatment systems. Mn(II) in the distribution systems could form
manganese dioxide, which is insoluble in water, causing several problems
such as water discoloration, turbidity, metallic taste, odour, corrosion
and biofouling. Oxidation is a common method for Mn(II) removal.
Oxidation process can become more efficient with catalytic effects of
several substances. High Mn(IV) concentrations can be maintained only by
sludge recycle which eventually leads to sludge ages as high as 10days.
The aim of this study was to determine whether ageing of MnO2 sludge
affects its catalytic effect on the oxidation of manganese by aeration.
In order to reach this aim, five different groups of experiments were
carried out by MnO2 sludge aged for a period of 0-10days. It has been
demonstrated that the catalytic effect of MnO2 sludge on the oxidation
of manganese, contrary to what is commonly expected, aeration increases
with increasing sludge age. It has been concluded that, catalytic
oxidation rate constant, k(cat) obtained from the batch systems can
safely be used in design of continuous flow Mn(II) oxidation reactors
with sludge recycle. As a result, the catalytic effect of MnO2 sludge on
the Mn(II) oxidation by aeration increases with increasing sludge age up
to approximately fourth day.
BibTeX:
@article{ISI:000323194300034,
  author = {Durak, Sevgi Gunes and Imer, Derya Y Koseoglu and Demirkol, Guler Turkoglu and Ormanci, Turkan and Armagan, Bulent and Tufekci, Nese},
  title = {Influence of ageing on the catalytic activity of MnO2 sludge for oxidation of Mn(II)},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2013},
  volume = {51},
  number = {28-30},
  pages = {5692--5700},
  doi = {10.1080/19443994.2013.769667}
}
Kiran I, Bektas N, Yatmaz HC and Tekbas M (2013), "Photocatalytic Fenton oxidation of sodium dodecyl sulfate solution using iron-modified zeolite catalyst", DESALINATION AND WATER TREATMENT. Vol. 51(28-30), pp. 5768-5775.
Abstract: The heterogeneous photo-Fenton oxidation of sodium dodecyl sulfate (SDS)
solutions was investigated in a quartz batch reactor using an artificial
UV light source. Fe-modified zeolite was used as a heterogeneous
catalyst in the process. The effect of various process variables on SDS
removal performance was evaluated by examining temperature, pH, H2O2
dosage, catalyst loading, initial SDS concentration and light intensity.
The optimal operational parameters were found as follows: temperature 35
degrees C, solution pH 7.5, 15mmol H2O2 dosage, and 1g/L catalyst
loading. Stability and the reuse of the catalyst were also tested.
Comparison with homogenous photo-Fenton process was also performed by
analyzing SDS removal rate. Kinetic investigation of removal process
based on different kinetic models was evaluated. The results showed that
the first-order kinetic model was in good correlation with experimental
data.
BibTeX:
@article{ISI:000323194300043,
  author = {Kiran, Ilkay and Bektas, Nihal and Yatmaz, H Cengiz and Tekbas, Mesut},
  title = {Photocatalytic Fenton oxidation of sodium dodecyl sulfate solution using iron-modified zeolite catalyst},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2013},
  volume = {51},
  number = {28-30},
  pages = {5768--5775},
  doi = {10.1080/19443994.2012.759517}
}
Insel G, Dagdar M, Dogruel S, Dizge N, Cokgor EU and Keskinler B (2013), "Biodegradation characteristics and size fractionation of landfill leachate for integrated membrane treatment", JOURNAL OF HAZARDOUS MATERIALS. Vol. 260, pp. 825-832.
Abstract: The fate of organics and nitrogen during the biological treatment with
MBR and subsequent membrane filtration processes (nano filtration, NE;
reverse osmosis, RO) were investigated for a landfill leachate. The
chemical oxygen demand (COD) and total Kjeldahl nitrogen (TKN) removal
performances of membrane bioreactor (MBR) were obtained to be around
89% and 85%, respectively. The effluent COD of MBR was measured to be
1935 mg/L (30 kDa) which is much lower than experimentally determined
soluble inert COD of 3200 mg/L using 0.45 mu m filter. The readily and
slowly biodegradable COD fractions were estimated to be 17% and 52% of
raw influent COD, respectively. The respirometry based modeling test
performed on raw leachate exhibited much slower degradation kinetics
compared to municipal wastewater. A unique subset of model parameters
was extracted from batch respirometry by using acclimated MBR sludge.
The sequential ultrafiltration (UF) experiments (particle size
distribution, PSD) revealed that most of the organics was below 2 nm
filter mesh size. In addition, NF/RO post treatment after MBR system was
required to increase COD and total nitrogen (TN) removal performances up
to 99%. Relatively lower salt rejection rates around 94% was obtained
for RO system as a post treatment of MBR system. (C) 2013 Elsevier B.V.
All rights reserved.
BibTeX:
@article{ISI:000324563500100,
  author = {Insel, Guclu and Dagdar, Mina and Dogruel, Serdar and Dizge, Nadir and Cokgor, Emine Ubay and Keskinler, Bulent},
  title = {Biodegradation characteristics and size fractionation of landfill leachate for integrated membrane treatment},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2013},
  volume = {260},
  pages = {825--832},
  doi = {10.1016/j.jhazmat.2013.06.037}
}
Copur Y, Tozluoglu A and Ozkan M (2013), "Evaluating pretreatment techniques for converting hazelnut husks to bioethanol", BIORESOURCE TECHNOLOGY. Vol. 129, pp. 182-190.
Abstract: This study examined the suitability of husk waste for bioethanol
production and compared pretreatment techniques with regard to their
efficiencies. Results showed that 4% NaBH4 (90 mm) delignified the
highest amount of lignin (49.1%) from the structure. The highest xylan
solubility (77.9%) was observed when samples were treated with 4% NaOH
for 90 min. Pretreatment with NaOH and NaBH4, compared to H2O2 and
H2SO4, resulted in selective delignification. The highest glucan to
glucose conversion (74.4%) and the highest ethanol yield (52.6 g/kg
husks) were observed for samples treated with 2% NaOH for 90 min. (C)
2012 Elsevier Ltd. All rights reserved.
BibTeX:
@article{ISI:000324566000026,
  author = {Copur, Yalcin and Tozluoglu, Ayhan and Ozkan, Melek},
  title = {Evaluating pretreatment techniques for converting hazelnut husks to bioethanol},
  journal = {BIORESOURCE TECHNOLOGY},
  year = {2013},
  volume = {129},
  pages = {182--190},
  doi = {10.1016/j.biortech.2012.11.058}
}
Eyvaz M, Akgiray O and Yuksel E (2013), "An experimental investigation on the hydraulic behavior of declining rate filtration", DESALINATION AND WATER TREATMENT. Vol. 51(31-33), pp. 6137-6147.
Abstract: Hydraulic behavior of declining rate filtration (DRF) was investigated
by means of pilot-scale experiments. A bank of four declining rate
filters was constructed and operated. The common water level in the
filters, individual filter velocities, and head losses in the filters
were carefully monitored and recorded as functions of time. Many of the
previous studies on DRF employed either a single average filtration
velocity or a single coagulant dosage. In this study, however, filter
runs were repeated treating the same water at several different
filtration rates and coagulant dosages. Using such an experimental
matrix of several different rates and coagulant dosages allowed an
evaluation of the behavior of the declining rate filtration system under
different operating conditions and the effects of the mentioned
variables on various hydraulic characteristics of the DRF system. The
validity of certain simplifying assumptions used in design calculations
was also tested in these experiments. It is believed that the new data
presented herein will lead to a better understanding of DRF.
BibTeX:
@article{ISI:000325921700026,
  author = {Eyvaz, Murat and Akgiray, Omer and Yuksel, Ebubekir},
  title = {An experimental investigation on the hydraulic behavior of declining rate filtration},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2013},
  volume = {51},
  number = {31-33},
  pages = {6137--6147},
  doi = {10.1080/19443994.2013.763736}
}
Kim K, Kim YS and Gurol MD (2013), "DNAPL TCE Oxidation with Permanganate: Influence of the Phase Transfer Catalyst Pentyltriphenylphosphonium", WATER AIR AND SOIL POLLUTION. Vol. 224(10)
Abstract: Dense nonaqueous phase (DNAPL) trichloroethylene (TCE) degradation by
potassium permanganate (KMnO4) was investigated in the presence of the
cationic surfactant pentyltriphenylphosphonium (PTPP) bromide, acting as
a phase transfer catalyst. Series of batch tests were performed in
5.0-mL conical vials containing Milli-Q water and 1.0mM DNAPL TCE with
initial permanganate concentrations ([MnO4(-)]0) of 1.0, 2.0, 3.0, and
5.0 mM, adding PTPP (0, 10, and 20 mol% of permanganate, respectively).
Chloride ion (Cl-) and MnO4(-) in water samples were analyzed to observe
MnO4(-) consumption and TCE degradation over the elapsed time (0 to 90
min). The calculated values of pseudo first-order rate constants for
MnO4(-) consumption indicated that the rate of MnO4(-) depletion
increased with higher mole percent PTPP. At experimental conditions of
1.0 and 2.0 mM [MnO4(-)]0, analyses of Cl- concentration showed that
higher mole percent of PTPP induced greater Cl- release, indicating
faster TCE oxidation. On the other hand, for 3.0 and 5.0 mM [MnO4(-)]
0, the concentration of Cl- was lower with the presence of PTPP. This
result indicated that MnO4(-) had migrated further into the inner space
of DNAPL, and consequently, the Cl- took a longer time to diffuse from
DNAPL to an aqueous phase.
BibTeX:
@article{ISI:000326051700015,
  author = {Kim, Kyehee and Kim, Yong Sang and Gurol, Mirat D},
  title = {DNAPL TCE Oxidation with Permanganate: Influence of the Phase Transfer Catalyst Pentyltriphenylphosphonium},
  journal = {WATER AIR AND SOIL POLLUTION},
  year = {2013},
  volume = {224},
  number = {10},
  doi = {10.1007/s11270-013-1735-6}
}
Ozturk T, Veli S and Dimoglo A (2013), "The Effect of Seawater Conductivity on the Treatment of Leachate by Electrocoagulation", CHEMICAL AND BIOCHEMICAL ENGINEERING QUARTERLY. Vol. 27(3), pp. 347-354.
Abstract: The effect of seawater (SW) conductivity on the treatment of domestic
solid waste leachates (DSWL) and hazardous solid waste leachates (HSWL)
by means of EC was investigated. Seawater, which is a strong electrolyte
with a rich content of ions, has been fed together with the leachates to
the reactors with Fe and Al electrodes. In the experiments, the
treatment was performed by mixing leachate (DSWL and HSWL) with seawater
in the proportions of 1:1 and 1:3. The efficiency of the process was
determined by observing such parameters of suspended solids as
phosphate, sulphate, color and turbidity. It was determined that the
removal efficiencies related to the amount of seawater added, increase
for all parameters except sulphate ions removal. Obtained data showed
the best removal efficiency for Fe and Al electrodes ranging from 67 %
to 100 % in the phosphate content, color and turbidity. For suspended
solids and sulfate ions, the removal efficiencies vary in the range of
50-70 %.
The results show that seawater added to the process accelerates the EC
process due to increasing conductivity and the presence of other ions in
its composition.
BibTeX:
@article{ISI:000326058300012,
  author = {Ozturk, T and Veli, S and Dimoglo, A},
  title = {The Effect of Seawater Conductivity on the Treatment of Leachate by Electrocoagulation},
  journal = {CHEMICAL AND BIOCHEMICAL ENGINEERING QUARTERLY},
  year = {2013},
  volume = {27},
  number = {3},
  pages = {347--354}
}
Kobya M, Demirbas E, Gebologlu U, Oncel MS and Yildirim Y (2013), "Optimization of arsenic removal from drinking water by electrocoagulation batch process using response surface methodology", DESALINATION AND WATER TREATMENT. Vol. 51(34-36), pp. 6676-6687.
Abstract: In this investigation, arsenic removal from drinking water using
electrocoagulation (EC) in a batch mode was studied by response surface
methodology (RSM). The RSM was applied to optimize the operating
variables viz. current density (CD, A/m(2)), operating time (t(EC), min)
and arsenic concentration (C-o, g/L) on arsenic removal in the EC
process using iron electrodes. The combined effects of these variables
were analyzed by the RSM using quadratic model for predicting the
highest removal efficiency of arsenic from drinking water. The proposed
model fitted very well with the experimental data. R-2 adjusted
correlation coefficients (AdjR(2): 0.93) for arsenic removal efficiency
showed a high significance of the model. The model predicted for a
maximum removal of arsenic at the optimum operating conditions
(112.3g/L, 5.64A/m(2) and 5min) after the EC process was 93.86% which
corresponded to effluent arsenic concentration of 6.9g/L. The minimum
operating cost (OC) of the EC process was 0.0664Euro/m(3). This study
clearly showed that the RSM was one of the suitable methods for the EC
process to optimize the best operating conditions for target value of
effluent arsenic concentration (textless10g/L) while keeping the OC (energy and
electrode consumptions) to minimal.
BibTeX:
@article{ISI:000326371800026,
  author = {Kobya, M and Demirbas, E and Gebologlu, U and Oncel, M S and Yildirim, Y},
  title = {Optimization of arsenic removal from drinking water by electrocoagulation batch process using response surface methodology},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2013},
  volume = {51},
  number = {34-36},
  pages = {6676--6687},
  doi = {10.1080/19443994.2013.769700}
}
Sen N, Bektas N, Tekbas M and Yatmaz HC (2013), "Investigation of Total Organic Carbon (TOC) Removal in Domestic Wastewater by Photo-Fenton Process", EKOLOJI. Vol. 22(88), pp. 58-64.
Abstract: Water consumption is increasing due to industrialization and population
growth causing increased amounts of wastewater for discharge with the
application of various treatment methods to treat wastewater. Advanced
oxidation processes (AOPs) are also emerging as a promising technology
both as an alternative treatment to conventional wastewater treatment
methods and enhancement of current biological treatment methods, for
especially highly toxic and non-biodegradable wastes. In this study, the
applicability of Photo-Fenton oxidation method was investigated for the
removal of total organic carbon (TOO) content in domestic wastewaters.
The effects of various process variables on removal performance of the
process were evaluated by examining Fe+2 and H2O2 dosages, temperature,
pH, the types of reactors and UV lamps. Optimal experimental conditions
for the wastewater treatment were found as 200 mg/L Fe+2, 15 mM H2O2 and
35 degrees C. Ultraviolet A (UVA) light type of lamp was used as a light
source in order to use solar energy TOC removal efficiencies of 70-90%
were obtained under various experimental conditions. As a result of this
study, it can be concluded that Fe+2-H2O2/UV process can be safely used
for the treatment of domestic wastewaters.
BibTeX:
@article{ISI:000326416700008,
  author = {Sen, Nuray and Bektas, Nihal and Tekbas, Mesut and Yatmaz, Huseyin Cengiz},
  title = {Investigation of Total Organic Carbon (TOC) Removal in Domestic Wastewater by Photo-Fenton Process},
  journal = {EKOLOJI},
  year = {2013},
  volume = {22},
  number = {88},
  pages = {58--64},
  doi = {10.5053/ekoloji.2013.888}
}
Gengec E and Kobya M (2013), "Treatment of Baker's Yeast Wastewater by Electrocoagulation and Evaluation of Molecular Weight Distribution with HPSEC", SEPARATION SCIENCE AND TECHNOLOGY. Vol. 48(18), pp. 2880-2889.
Abstract: In the present paper, the molecular weight distributions (MWDs) of
Baker's yeast wastewater (BYW) during electrocoagulation (EC) are
investigated by High Performance Size Exclusion Chromatography (HPSEC)
with ultraviolet diode array (DAD) and refractive index detectors (RID).
The results of this study show that using DAD and RID in HPSEC are quite
useful in order to reveal changes in MWDs of all components (whether
UV-Vis absorption or not) by RID, and colored (strongly absorb UV-Vis
radiation) by DAD. Molecular Weights (MW) of components are varied in a
wide range of 92.0 Da - 2.1x10(6) Da. The high molecular weight
components (HMWCs) and low molecular weight components (LMWCs) are
present in low concentrations but they contribute high amount to color
intensity (total contribution of two fractions are about 80%) whereas
the intermediate molecular weight components (IMWCs) have high
concentration with low amount to color intensity. The optimum operating
conditions for the removal of color and COD are found as 86% and 43%
at 80 A/m(2), pH(i) 4 and 20min in EC process with Al electrode. The EC
process remove the HMWCs more efficiently; thus color removal
efficiencies are high with respect to COD and TOC removal efficiencies
during EC.
BibTeX:
@article{ISI:000326674200019,
  author = {Gengec, Erhan and Kobya, Mehmet},
  title = {Treatment of Baker's Yeast Wastewater by Electrocoagulation and Evaluation of Molecular Weight Distribution with HPSEC},
  journal = {SEPARATION SCIENCE AND TECHNOLOGY},
  year = {2013},
  volume = {48},
  number = {18},
  pages = {2880--2889},
  doi = {10.1080/01496395.2013.804087}
}
Karagoz P and Ozkan M (2013), "Optimization of dilute acid and alkaline peroxide pretreatment to enhance ethanol production from wheat straw", TURKISH JOURNAL OF BIOCHEMISTRY-TURK BIYOKIMYA DERGISI. Vol. 38(4), pp. 457-467.
Abstract: Objective: The main purpose of this study was to determine the optimal
pretreatment process conditions for wheat straw to maximize the overall
ethanol yield.
Methods: The effects of pretreatment conditions for dilute acid and
alkaline peroxide pretreatment were investigated using Response Surface
Methodology (RSM). Co-fermentation with S. cerevisiae and P. stipitis
was employed to produce ethanol from pretreated solids. Cellulose and
xylan composition of wheat straw, degradability of these compounds, as
well as ethanol production, were monitored at different conditions.
Results: 0.5% H2SO4 concentration, 15% solid loading, and particle
size between 0.75-0.9 mm ( 20 mesh) was predicted to be optimal by RSM
for dilute acid pretreatment and experiment performed at that condition
resulted in overall ethanol yield of 12.95%. The maximum overall
ethanol yield determined for alkaline peroxide pretreatment is 18.23%
and can be achieved when the pretreatment were done with 0.875% H2O2 at
35 degrees C for 1 h. Experimental results agreed with the responses.
Conclusion: Alkaline peroxide pretreatment of wheat straw was found to
be more effective than dilute acid pretreatment for enhancing bioethanol
production from wheat straw by co-fermentation.
BibTeX:
@article{ISI:000329577500014,
  author = {Karagoz, Pinar and Ozkan, Melek},
  title = {Optimization of dilute acid and alkaline peroxide pretreatment to enhance ethanol production from wheat straw},
  journal = {TURKISH JOURNAL OF BIOCHEMISTRY-TURK BIYOKIMYA DERGISI},
  year = {2013},
  volume = {38},
  number = {4},
  pages = {457--467},
  doi = {10.5505/tjb.2013.57431}
}
Senturk E (2013), "The treatment of zinc-cyanide electroplating rinse water using an electrocoagulation process", WATER SCIENCE AND TECHNOLOGY. Vol. 68(10), pp. 2220-2227.
Abstract: This paper investigates the treatment of zinc-cyanide electroplating
rinse water using an electrocoagulation process (ECP). The effects of
operating parameters such as electrode material, current density (2.5-40
A/m(2)), operating time (0-60 min), initial pH (5-12) and electrode
connection mode (monopolar parallel (MP-P), monopolar series and bipolar
series) on the ECP were evaluated to find the optimum operating
conditions. At 20 A/m(2), 60 min, the highest removal efficiencies were
obtained with 85 and 99% for Fe and 64 and 33% for Al electrodes, for
cyanide and zinc, respectively. The optimum operating conditions were
found to be 30 A/m(2) and 40 min, for the Fe electrode at the original
pH (9.5) of the rinse water. Considering efficiency and economy, the
MP-P connection mode was determined as the optimum connection mode.
BibTeX:
@article{ISI:000330122400016,
  author = {Senturk, Elif},
  title = {The treatment of zinc-cyanide electroplating rinse water using an electrocoagulation process},
  journal = {WATER SCIENCE AND TECHNOLOGY},
  year = {2013},
  volume = {68},
  number = {10},
  pages = {2220--2227},
  doi = {10.2166/wst.2013.481}
}
Karagoz P and Ozkan M (2012), "Continuous ethanol production from glucose and xylose by Pichia stipitis and Saccharomyces cerevisiae: using an immobilized cell reactor", NEW BIOTECHNOLOGY. Vol. 29(S), pp. S5.
BibTeX:
@article{ISI:000209805600011,
  author = {Karagoz, Pinar and Ozkan, Melek},
  title = {Continuous ethanol production from glucose and xylose by Pichia stipitis and Saccharomyces cerevisiae: using an immobilized cell reactor},
  journal = {NEW BIOTECHNOLOGY},
  year = {2012},
  volume = {29},
  number = {S},
  pages = {S5},
  doi = {10.1016/j.nbt.2012.08.006}
}
Dursun F, Ozoner SK, Demirci A, Gorur M, Yilmaz F and Erhan E (2012), "Vinylferrocene copolymers based biosensors for phenol derivatives", JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. Vol. 87(1), pp. 95-104.
BibTeX:
@article{ISI:000298013400013,
  author = {Dursun, Fuat and Ozoner, Seyda Korkut and Demirci, Ali and Gorur, Mesut and Yilmaz, Faruk and Erhan, Elif},
  title = {Vinylferrocene copolymers based biosensors for phenol derivatives},
  journal = {JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY},
  year = {2012},
  volume = {87},
  number = {1},
  pages = {95--104},
  doi = {10.1002/jctb.2688}
}
Ozoner SK (2012), "Poly(glycidyl methacrylate-co-3-thienyl-methylmethacrylate) based working electrodes for hydrogen peroxide biosensing", JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. Vol. 87(1), pp. 146-152.
BibTeX:
@article{ISI:000298013400019,
  author = {Ozoner, Seyda Korkut},
  title = {Poly(glycidyl methacrylate-co-3-thienyl-methylmethacrylate) based working electrodes for hydrogen peroxide biosensing},
  journal = {JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY},
  year = {2012},
  volume = {87},
  number = {1},
  pages = {146--152},
  doi = {10.1002/jctb.2695}
}
Can F, Ozoner SK, Ergenekon P and Erhan E (2012), "Amperometric nitrate biosensor based on Carbon nanotube/Polypyrrole/Nitrate reductase biofilm electrode", MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS. Vol. 32(1), pp. 18-23.
BibTeX:
@article{ISI:000298463800003,
  author = {Can, Faruk and Ozoner, Seyda Korkut and Ergenekon, Pinar and Erhan, Elif},
  title = {Amperometric nitrate biosensor based on Carbon nanotube/Polypyrrole/Nitrate reductase biofilm electrode},
  journal = {MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS},
  year = {2012},
  volume = {32},
  number = {1},
  pages = {18--23},
  doi = {10.1016/j.msec.2011.09.004}
}
Sulak MT and Yatmaz HC (2012), "Removal of textile dyes from aqueous solutions with eco-friendly biosorbent", DESALINATION AND WATER TREATMENT. Vol. 37(1-3), pp. 169-177.
BibTeX:
@article{ISI:000300362900021,
  author = {Sulak, Meral Topcu and Yatmaz, H Cengiz},
  title = {Removal of textile dyes from aqueous solutions with eco-friendly biosorbent},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2012},
  volume = {37},
  number = {1-3},
  pages = {169--177},
  doi = {10.5004/dwt.2012.2928}
}
Akyol A (2012), "Treatment of paint manufacturing wastewater by electrocoagulation", DESALINATION. Vol. 285, pp. 91-99.
BibTeX:
@article{ISI:000300478100012,
  author = {Akyol, Abdurrahman},
  title = {Treatment of paint manufacturing wastewater by electrocoagulation},
  journal = {DESALINATION},
  year = {2012},
  volume = {285},
  pages = {91--99},
  doi = {10.1016/j.desal.2011.09.039}
}
Kose B, Ozgun H, Ersahin ME, Dizge N, Koseoglu-Imer DY, Atay B, Kaya R, Altinbas M, Sayili S, Hoshan P, Atay D, Eren E, Kinaci C and Koyuncu I (2012), "Performance evaluation of a submerged membrane bioreactor for the treatment of brackish oil and natural gas field produced water", DESALINATION. Vol. 285, pp. 295-300.
BibTeX:
@article{ISI:000300478100039,
  author = {Kose, Borte and Ozgun, Hale and Ersahin, Mustafa Evren and Dizge, Nadir and Koseoglu-Imer, Derya Y and Atay, Burcu and Kaya, Recep and Altinbas, Mahmut and Sayili, Sema and Hoshan, Pelin and Atay, Doga and Eren, Esra and Kinaci, Cumali and Koyuncu, Ismail},
  title = {Performance evaluation of a submerged membrane bioreactor for the treatment of brackish oil and natural gas field produced water},
  journal = {DESALINATION},
  year = {2012},
  volume = {285},
  pages = {295--300},
  doi = {10.1016/j.desal.2011.10.016}
}
Gengec E, Kobya M, Demirbas E, Akyol A and Oktor K (2012), "Optimization of baker's yeast wastewater using response surface methodology by electrocoagulation", DESALINATION. Vol. 286, pp. 200-209.
BibTeX:
@article{ISI:000300648100026,
  author = {Gengec, Erhan and Kobya, Mehmet and Demirbas, Erhan and Akyol, Abdurrahman and Oktor, Kadriye},
  title = {Optimization of baker's yeast wastewater using response surface methodology by electrocoagulation},
  journal = {DESALINATION},
  year = {2012},
  volume = {286},
  pages = {200--209},
  doi = {10.1016/j.desal.2011.11.023}
}
Koseoglu-Imer DY, Dizge N and Koyuncu I (2012), "Enzymatic activation of cellulose acetate membrane for reducing of protein fouling", COLLOIDS AND SURFACES B-BIOINTERFACES. Vol. 92, pp. 334-339.
BibTeX:
@article{ISI:000300859000047,
  author = {Koseoglu-Imer, Derya Y and Dizge, Nadir and Koyuncu, Ismail},
  title = {Enzymatic activation of cellulose acetate membrane for reducing of protein fouling},
  journal = {COLLOIDS AND SURFACES B-BIOINTERFACES},
  year = {2012},
  volume = {92},
  pages = {334--339},
  doi = {10.1016/j.colsurfb.2011.12.013}
}
Karagoz P, Rocha IV, Ozkan M and Angelidaki I (2012), "Alkaline peroxide pretreatment of rapeseed straw for enhancing bioethanol production by Same Vessel Saccharification and Co-Fermentation", BIORESOURCE TECHNOLOGY. Vol. 104, pp. 349-357.
BibTeX:
@article{ISI:000301155800047,
  author = {Karagoz, Pinar and Rocha, Indre V and Ozkan, Melek and Angelidaki, Irini},
  title = {Alkaline peroxide pretreatment of rapeseed straw for enhancing bioethanol production by Same Vessel Saccharification and Co-Fermentation},
  journal = {BIORESOURCE TECHNOLOGY},
  year = {2012},
  volume = {104},
  pages = {349--357},
  doi = {10.1016/j.biortech.2011.10.075}
}
Ozkurt N and Karpuzcu M (2012), "INVESTIGATION OF SO2 RESULTS WITH PASSIVE DIFFUSIVE SAMPLERS AROUND 18 MART CAN THERMAL POWER PLANT IN CANAKKALE", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 21(1), pp. 3-10.
Abstract: In Turkey, one of the major air pollution sources is energy utilization
due to the combustion of lignite. Increasing energy consumption and use
of domestic lignite causes the unavoidable increase of SO2 pollution.
Especially around large combustion plants (i.e. coal-fired thermal power
plants), monitoring cost is critical for evaluation of environmental
impacts, since their impact area is very large, depending on measurement
techniques.
Since passive diffusion samplers have the potential to provide a cheap
and effective means of determining atmospheric trace gas concentrations,
they were preferred for monitoring of SO2 concentrations in the impact
area of Can Thermal Power Plant. For more accurate and continuous
measurements of air pollutants, an automated continuous measurement
analyzer using UV fluorescence was also used. The passive diffusion
samplers were co-located with the available AQMS (Air Quality Monitoring
Stations), and during the year 2006, the continuous analyzer was
co-located with the AQMS in Bayramic County, near the Can Thermal Power
Plant. The two different measurement techniques were used to monitor and
compare monthly measurements using least-square regression.
The temporal variations observed with the passive samplers and AQMS data
for SO2 concentrations were similar. The 8-months comparison of 2006,
between passive sampler technique and automated analyzer measurement
suggests that, in most cases, SO2 results correlate fairly well.
BibTeX:
@article{ISI:000301816400001,
  author = {Ozkurt, Nesimi and Karpuzcu, Mehmet},
  title = {INVESTIGATION OF SO2 RESULTS WITH PASSIVE DIFFUSIVE SAMPLERS AROUND 18 MART CAN THERMAL POWER PLANT IN CANAKKALE},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2012},
  volume = {21},
  number = {1},
  pages = {3--10}
}
Sulak MT, Erhan E and Keskinler B (2012), "Electrochemical Phenol Biosensor Configurations Based on Nanobiocomposites", SENSORS AND MATERIALS. Vol. 24(3), pp. 141-152.
BibTeX:
@article{ISI:000303619900003,
  author = {Sulak, Meral Topcu and Erhan, Elif and Keskinler, Bulent},
  title = {Electrochemical Phenol Biosensor Configurations Based on Nanobiocomposites},
  journal = {SENSORS AND MATERIALS},
  year = {2012},
  volume = {24},
  number = {3},
  pages = {141--152}
}
Konyar M, Yatmaz HC and Ozturk K (2012), "Sintering temperature effect on photocatalytic efficiencies of ZnO/TiO2 composite plates", APPLIED SURFACE SCIENCE. Vol. 258(19), pp. 7440-7447.
BibTeX:
@article{ISI:000304254000034,
  author = {Konyar, Mehmet and Yatmaz, H Cengiz and Ozturk, Koray},
  title = {Sintering temperature effect on photocatalytic efficiencies of ZnO/TiO2 composite plates},
  journal = {APPLIED SURFACE SCIENCE},
  year = {2012},
  volume = {258},
  number = {19},
  pages = {7440--7447},
  doi = {10.1016/j.apsusc.2012.04.058}
}
Kobya M, Demirbas E and Sahin O (2012), "Effect of operational parameters on the removal of phenol from aqueous solutions by electrocoagulation using Fe and Al electrodes", DESALINATION AND WATER TREATMENT. Vol. 46(1-3), pp. 366-374.
BibTeX:
@article{ISI:000304590700040,
  author = {Kobya, Mehmet and Demirbas, Erhan and Sahin, Oguz},
  title = {Effect of operational parameters on the removal of phenol from aqueous solutions by electrocoagulation using Fe and Al electrodes},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2012},
  volume = {46},
  number = {1-3},
  pages = {366--374},
  doi = {10.1080/19443994.2012.677565}
}
Ondul E, Dizge N and Albayrak N (2012), "Immobilization of Candida antarctica A and Thermomyces lanuginosus lipases on cotton terry cloth fibrils using polyethyleneimine", COLLOIDS AND SURFACES B-BIOINTERFACES. Vol. 95, pp. 109-114.
BibTeX:
@article{ISI:000304686200015,
  author = {Ondul, Eda and Dizge, Nadir and Albayrak, Nedim},
  title = {Immobilization of Candida antarctica A and Thermomyces lanuginosus lipases on cotton terry cloth fibrils using polyethyleneimine},
  journal = {COLLOIDS AND SURFACES B-BIOINTERFACES},
  year = {2012},
  volume = {95},
  pages = {109--114},
  doi = {10.1016/j.colsurfb.2012.02.020}
}
Gengec E, Kobya M, Demirbas E, Akyol A and Oktor K (2012), "Electrochemical treatment of Baker's yeast wastewater containing melanoidin: optimization through response surface methodology", WATER SCIENCE AND TECHNOLOGY. Vol. 65(12), pp. 2183-2190.
BibTeX:
@article{ISI:000305718600014,
  author = {Gengec, E and Kobya, M and Demirbas, E and Akyol, A and Oktor, K},
  title = {Electrochemical treatment of Baker's yeast wastewater containing melanoidin: optimization through response surface methodology},
  journal = {WATER SCIENCE AND TECHNOLOGY},
  year = {2012},
  volume = {65},
  number = {12},
  pages = {2183--2190},
  doi = {10.2166/wst.2012.130}
}
Olmezoglu E, Herand BK, Oncel MS, Tunc K and Ozkan M (2012), "Copper bioremoval by novel bacterial isolates and their identification by 16S rRNA gene sequence analysis", TURKISH JOURNAL OF BIOLOGY. Vol. 36(4), pp. 469-476.
BibTeX:
@article{ISI:000307042100012,
  author = {Olmezoglu, Elif and Herand, Binnur Kiratli and Oncel, Mehmet Salim and Tunc, Kenan and Ozkan, Melek},
  title = {Copper bioremoval by novel bacterial isolates and their identification by 16S rRNA gene sequence analysis},
  journal = {TURKISH JOURNAL OF BIOLOGY},
  year = {2012},
  volume = {36},
  number = {4},
  pages = {469--476},
  doi = {10.3906/biy-1104-15}
}
Kurt E, Koseoglu-Imer DY, Dizge N, Chellam S and Koyuncu I (2012), "Pilot-scale evaluation of nanofiltration and reverse osmosis for process reuse of segregated textile dyewash wastewater", DESALINATION. Vol. 302, pp. 24-32.
BibTeX:
@article{ISI:000308450300002,
  author = {Kurt, Eren and Koseoglu-Imer, Derya Yuksel and Dizge, Nadir and Chellam, Shankar and Koyuncu, Ismail},
  title = {Pilot-scale evaluation of nanofiltration and reverse osmosis for process reuse of segregated textile dyewash wastewater},
  journal = {DESALINATION},
  year = {2012},
  volume = {302},
  pages = {24--32},
  doi = {10.1016/j.desal.2012.05.019}
}
Engin GO, Muftuoglu B and Senturk E (2012), "Dynamic biosorption characteristics and mechanisms of dried activated sludge and Spirulina platensis for the removal of Cu2+ ions from aqueous solutions", DESALINATION AND WATER TREATMENT. Vol. 47(1-3), pp. 310-321.
BibTeX:
@article{ISI:000308996900037,
  author = {Engin, Guleda Onkal and Muftuoglu, Burcu and Senturk, Elif},
  title = {Dynamic biosorption characteristics and mechanisms of dried activated sludge and Spirulina platensis for the removal of Cu2+ ions from aqueous solutions},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2012},
  volume = {47},
  number = {1-3},
  pages = {310--321},
  doi = {10.1080/19443994.2012.696425}
}
Yuksel E, Gurbulak E and Eyvaz M (2012), "Decolorization of a reactive dye solution and treatment of a textile wastewater by electrocoagulation and chemical coagulation: Techno-economic comparison", ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY. Vol. 31(4), pp. 524-535.
BibTeX:
@article{ISI:000310261600005,
  author = {Yuksel, Ebubekir and Gurbulak, Ercan and Eyvaz, Murat},
  title = {Decolorization of a reactive dye solution and treatment of a textile wastewater by electrocoagulation and chemical coagulation: Techno-economic comparison},
  journal = {ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY},
  year = {2012},
  volume = {31},
  number = {4},
  pages = {524--535},
  doi = {10.1002/ep.10574}
}
Odabasi M, Bayram A, Elbir T, Dumanoglu Y, Kara M, Altiok H and Cetin B (2012), "Investigation of seasonal variations and sources of atmospheric polychlorinated naphthalenes (PCNs) in an urban area", ATMOSPHERIC POLLUTION RESEARCH. Vol. 3(4, SI), pp. 477-484.
BibTeX:
@article{ISI:000310516300017,
  author = {Odabasi, Mustafa and Bayram, Abdurrahman and Elbir, Tolga and Dumanoglu, Yetkin and Kara, Melik and Altiok, Hasan and Cetin, Banu},
  title = {Investigation of seasonal variations and sources of atmospheric polychlorinated naphthalenes (PCNs) in an urban area},
  journal = {ATMOSPHERIC POLLUTION RESEARCH},
  year = {2012},
  volume = {3},
  number = {4, SI},
  pages = {477--484},
  doi = {10.5094/APR.2012.055}
}
Kobya M and Gengec E (2012), "Decolourization of melanoidins by a electrocoagulation process using aluminium electrodes", ENVIRONMENTAL TECHNOLOGY. Vol. 33(21), pp. 2429-2438.
Abstract: The decolourization of melanoidins was studied with a batch
electrocoagulation (EC) process using aluminium electrodes. The effects
of conductivity (kappa = 500-3000 mu S/cm), initial pH(i) (4.2-8.2),
current density (j = 2.5-7.5A/m(2)), initial melanoidin concentration
(C-0 = 100-800 mg/L) and operating time (t(EC) = 0-60 min) were
investigated on the decolourization efficiency. The results obtained
from the EC process were extremely efficient and able to achieve a
decolourization efficiency of textgreater98% at pH(i) = 4.2, j = 5A/m(2), kappa =
2500 mu S/cm, C-0 = 100 mg/L and t(EC) = 10 min. The decolourization
performance was dependent on pH(i) value since the lower pH values led
to faster reactions and higher decolourization efficiency. Melanoidins
in the EC process were removed by precipitation and charge
neutralization at pH textless6.5, and both adsorption and sweep coagulation by
amorphous Al(OH)(3(s)) occurred at pH textgreater 6.5. The operating cost was
calculated as 0.0096 (sic)/m(3).
BibTeX:
@article{ISI:000311120000008,
  author = {Kobya, M and Gengec, E},
  title = {Decolourization of melanoidins by a electrocoagulation process using aluminium electrodes},
  journal = {ENVIRONMENTAL TECHNOLOGY},
  year = {2012},
  volume = {33},
  number = {21},
  pages = {2429--2438},
  doi = {10.1080/09593330.2012.671371}
}
Ozman-Say AN and Balkis N (2012), "PHYTOPLANKTON ASSEMBLAGES IN THE COASTAL ZONE OF THE GULF OF ISKENDERUN - NORTH EASTERN MEDITERRANEAN", PAKISTAN JOURNAL OF BOTANY. Vol. 44(5), pp. 1785-1798.
Abstract: In order to determine the phytoplankton species in the Gulf of
Iskenderun and the environmental factors that affect the distributions
of the species, samples were collected horizontally with a plankton net
at 9 stations in November 2005 and June 2006. As a result of the
examination of the samples, 95 phytoplankton species belonging to 3
classes were identified. 12 species were new records for the Gulf of
Iskenderun, one (Navicula transitans Cleve, 1883) of them was a new
report for all the Turkish seas. Dinoflagellates were the majority group
of the species composition (53.7%), followed by diatoms (45.3%). Most
of the species identified in this study consist of phytoplanktonic algae
reported in the Eastern Mediterranean earlier. These species were
neritic, oceanic, temperate and subtropic. In this study, 18 species
defined as potentially harmful algal species and three of them were also
toxic. Primary hydrographic conditions, such as temperature (20.2-28.7
degrees C), salinity (31.0-39 ppt) and dissolved oxygen (7.21-8.60 mg
l(-1)), were recorded on each sampling occasion. In addition, a
check-list of the phytoplankton species recorded up to this date was
given and totally 269 species were recorded from the Gulf of Iskenderun.
BibTeX:
@article{ISI:000311185700046,
  author = {Ozman-Say, Ayse Neslihan and Balkis, Neslihan},
  title = {PHYTOPLANKTON ASSEMBLAGES IN THE COASTAL ZONE OF THE GULF OF ISKENDERUN - NORTH EASTERN MEDITERRANEAN},
  journal = {PAKISTAN JOURNAL OF BOTANY},
  year = {2012},
  volume = {44},
  number = {5},
  pages = {1785--1798}
}
Samuk B, Kabdash I, Tunay O and Karpuzcu M (2012), "FLUORIDE ABATEMENT FROM ALUMINIUM SURFACE TREATMENT EFFLUENTS BY ELECTROCOAGULATION", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 21(10A, SI), pp. 3114-3121.
Abstract: In the present study, the treatability of an aluminium surface treatment
effluent bearing high amount of fluoride (3360-6440 mg/L) and aluminium
(2695-4690 mg/L) together with organic matter (340-370 mg COD/L) by
electrocoagulation using aluminium electrodes was studied. The effect of
varying operating parameters such as the applied current density
(3.7-29.8 mA/cm(2)), initial pH (2.55-3.86) and electrolyte (NaCl)
concentration (500-3000 mg/L) on fluoride abatement as well as organic
matter and aluminium removals was investigated. The results of the
experimental study indicated that an increase in the applied current
density significantly enhanced EC process performance whereas there was
no significant effect of electrolyte (NaCl) concentration on pollutant
removal efficiency. The electrocoagulation process proved to be
effective and efficient for the treatment of aluminium surface treatment
process effluents providing fluoride abatements up to 99% together with
around 90% aluminium removals.
BibTeX:
@article{ISI:000312412700016,
  author = {Samuk, Beyza and Kabdash, Isik and Tunay, Olcay and Karpuzcu, Mehmet},
  title = {FLUORIDE ABATEMENT FROM ALUMINIUM SURFACE TREATMENT EFFLUENTS BY ELECTROCOAGULATION},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2012},
  volume = {21},
  number = {10A, SI},
  pages = {3114--3121}
}
Anil I, Ozturk N, Alagha O and Ergenekon P (2012), "Optimization of solid-phase microextraction using Taguchi design to quantify trace level polycyclic aromatic hydrocarbons in water", JOURNAL OF SEPARATION SCIENCE. Vol. 35(24), pp. 3561-3568.
Abstract: This article introduces a simple, rapid, and reliable solid-phase
microextraction (SPME) method coupled with GC-MS for the quantitative
determination of 16 polycyclic aromatic hydrocarbons in water. In this
study, the Taguchi experimental design was used to optimize extraction
conditions of polycyclic aromatic hydrocarbons using SPME method to
obtain highly enriched analytes. Consequently, quantitative
determination of polycyclic aromatic hydrocarbons in water was achieved
by GC-MS technique. The selected parameters affecting enrichment of
polycyclic aromatic hydrocarbons were sample extraction time, stirring
speed, temperature, ionic strength, and pH. The study revealed that
optimal operating conditions were found to be 90-min extraction time,
1400 rpm stirring speed, and 60 degrees C sample temperature. The effect
of ionic strength and pH were shown to be insignificant. Optimized
conditions were also reevaluated by placing the 16 polycyclic aromatic
hydrocarbons into several subgroups based on their molecular weight. The
extraction efficiency of polycyclic aromatic hydrocarbons with low
molecular weight was shown to be a function of only the extracting
temperature. Satisfactory results were obtained for linearity
(0.9830.999), detection limits (2.6718.02 ng/L), accuracy (71.299.3%),
and precision (4.313.5%). The optimum conditions reported by other
design approaches were evaluated and generalized optimum conditions were
suggested.
BibTeX:
@article{ISI:000312445900019,
  author = {Anil, Ismail and Ozturk, Naciye and Alagha, Omar and Ergenekon, Pinar},
  title = {Optimization of solid-phase microextraction using Taguchi design to quantify trace level polycyclic aromatic hydrocarbons in water},
  journal = {JOURNAL OF SEPARATION SCIENCE},
  year = {2012},
  volume = {35},
  number = {24},
  pages = {3561--3568},
  doi = {10.1002/jssc.201200550}
}
Odabasi M and Cetin B (2012), "Determination of octanol-air partition coefficients of organochlorine pesticides (OCPs) as a function of temperature: Application to air-soil exchange", JOURNAL OF ENVIRONMENTAL MANAGEMENT. Vol. 113, pp. 432-439.
Abstract: Octanol-air partition coefficients (K-OA) for 7 organochlorine
pesticides (OCPs) were determined as a function of temperature using the
GC retention time method. Log K-OA values at 25 degrees C ranged over
two orders of magnitude, between 8.32 (chlorpyrifos) and 10.48
(methoxychlor). The determined K-OA values were within a factor of 0.5
(endosulfan sulfate) to 7.9 (endrin aldehyde) for values calculated as
the ratio of octanol-water partition coefficient to dimensionless
Henry's law constant. The internal energies of phase transfer between
octanol and air (Delta U-OA) ranged between 71.8 and 95.4 kJ mol(-1) and
they were within the reported range for OCPs (55.8-105 kJ mol(-1)).
Atmospheric and soil OCP concentrations were also measured in Izmir,
Turkey, and data used to investigate the soil-air gas exchange. Net
soil-air gas exchange fluxes of OCPs ranged from -0.01 (volatilization,
cis-nonachlor) to 56.4 ng m(-2) day(-1) (deposition, chlorpyrifos) in
winter, while in summer they ranged from -0.03 (trans-nonachlor) to 329
ng m(-2) day(-1) (endosulfan I). In both sampling periods, endosulfan I
and II, trans-nonachlor, p,p'-DDD and p,p'-DDT were generally deposited
to the soil while gamma-HCH and heptachlor epoxide mostly volatilized.
Fluxes of other OCPs were variable (volatilization or absorption) due to
their largely fluctuating ambient air concentrations. Calculated dry
deposition and recently measured wet deposition fluxes were used to
estimate the relative importance of different mechanisms (i.e., dry
deposition, wet deposition, gas absorption, and volatilization) to the
local soil pollutant inventory. Generally, all mechanisms contributed
significantly to the soil OCP inventory. Volatilization fluxes were
generally much lower than the sum of input fluxes (dry deposition, wet
deposition and gas absorption) for most of the OCPs indicating a net
deposition to the soil. (C) 2012 Elsevier Ltd. All rights reserved.
BibTeX:
@article{ISI:000313153000048,
  author = {Odabasi, Mustafa and Cetin, Banu},
  title = {Determination of octanol-air partition coefficients of organochlorine pesticides (OCPs) as a function of temperature: Application to air-soil exchange},
  journal = {JOURNAL OF ENVIRONMENTAL MANAGEMENT},
  year = {2012},
  volume = {113},
  pages = {432--439},
  doi = {10.1016/j.jenvman.2012.10.010}
}
Sonmezay A, Salim Oncel M and Bektas N (2012), "Adsorption of lead and cadmium ions from aqueous solutions using manganoxide minerals", TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA. Vol. 22(12), pp. 3131-3139.
Abstract: Removal of lead and cadmium ions from aqueous solutions by adsorption
process was investigated. Low cost and locally available natural mineral
of manganoxide mineral was used as an adsorbent. The kinetics of
adsorption process data was examined using the pseudo-first-order,
pseudo-second-order kinetics and the intra-particle diffusion models.
The rate constants of adsorption for all these kinetics models were
calculated and compared. The adsorption kinetics was best described by
the pseudo second-order model. The Langmuir and Freundlich adsorption
isotherm models were applied to the experimental equilibrium data at
different temperatures. The experimental data well fitted to Langmuir
isotherm model. The maximum adsorption capacities of manganoxide mineral
for lead and cadmium ions were calculated from the Langmuir isotherm and
were 98 and 6.8 mg/g, respectively. Thermodynamic parameters such as the
change of Gibbs free energy, enthalpy and entropy of adsorption were
also calculated and it was found that the lead and cadmium uptake
reactions by manganoxide mineral were endothermic and spontaneous in
nature. Therefore, manganoxide mineral can be used as adsorbents for
lead and cadmium ions removal processes as an alternative natural
mineral among the others.
BibTeX:
@article{ISI:000317417800040,
  author = {Sonmezay, Aylin and Salim Oncel, M and Bektas, Nihal},
  title = {Adsorption of lead and cadmium ions from aqueous solutions using manganoxide minerals},
  journal = {TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA},
  year = {2012},
  volume = {22},
  number = {12},
  pages = {3131--3139},
  doi = {10.1016/S1003-6326(12)61765-8}
}
Bayer S, Arslan H and Karagunduz A (2012), "Influence of electrical field and electrocoagulation on the performance of submerged membrane bioreactors", In EUROMEMBRANE CONFERENCE 2012. Vol. 44, pp. 882-883.
BibTeX:
@inproceedings{ISI:000378594000243,
  author = {Bayer, S and Arslan, H and Karagunduz, A},
  editor = {Marsh, N},
  title = {Influence of electrical field and electrocoagulation on the performance of submerged membrane bioreactors},
  booktitle = {EUROMEMBRANE CONFERENCE 2012},
  year = {2012},
  volume = {44},
  pages = {882--883},
  doi = {10.1016/j.proeng.2012.08.609}
}
Vergili I, Kaya Y, Sen U, Gönder ZB and Aydiner C (2012), "Techno-economic analysis of textile dye bath wastewater treatment by integrated membrane processes under the zero liquid discharge approach", Resources, Conservation and Recycling., jan, 2012. Vol. 58, pp. 25-35. Elsevier B.V..
Abstract: The present study was intended to determine the usefulness of the zero liquid discharge (ZLD) approach in treating textile dye bath wastewater via integrated membrane processes. These processes included vari- ous combinations of ultrafiltration (UF), loose nanofiltration (NF1), tight nanofiltration (NF2) and reverse osmosis (RO). The technological and economic performance of four scenarios (UF/NF2 (S (I)), NF1/NF2 (S (II)), NF1/RO (S (III)) and UF/NF2/RO (S (IV))), each followed by membrane distillation (MD), were com- paratively analysed. The factors considered were capital and operating costs, revenues, benefit/cost (B/C) ratios and pay-back times. The last two scenarios, those including RO, provided the best effluent quality at the end of the pressure-driven membrane filtration process. However, these scenarios were not the most economical options because of the decreased benefits of recycling soda ash and NaCl obtained from the treated wastewater. The unit treatment costs of the scenarios were 1.37, 1.38, 2.16 and 2.01 /m3 of influent for S (I), S (II), S (III) and S (IV), respectively, with return periods of 0.87, 0.91, 2.07 and 1.51 years. The best technological and economic performance was estimated for S (I) and S (II), as indicated by the B/C ratios 3.58 and 3.55, respectively. At the break-even point of 15 years, S (I) required an incineration cost of 77.5 /m3 of MD concentrate, whereas the corresponding costs associated with the other three scenarios were estimated to be 75.7, 43.0 and 35.5 /m3 of MD concentrate, respectively. It was finally concluded that the ZLD approach is most useful in processing textile dye bath waste and recycling treated wastewater. This process is both technically feasible and economically viable, as indicated by the high B/C ratio. However, the unit incineration cost associated with the concentrate would limit the return period of the investment, and the success of this method would also depend principally on the real volume of MD processed due to its large contribution (70–90%) to the B/C ratio. textcopyright
BibTeX:
@article{Vergili2012,
  author = {Vergili, Ilda and Kaya, Yasemin and Sen, Unal and Gönder, Zeren Beril and Aydiner, Coskun},
  title = {Techno-economic analysis of textile dye bath wastewater treatment by integrated membrane processes under the zero liquid discharge approach},
  journal = {Resources, Conservation and Recycling},
  publisher = {Elsevier B.V.},
  year = {2012},
  volume = {58},
  pages = {25--35},
  url = {http://linkinghub.elsevier.com/retrieve/pii/S0921344911002072},
  doi = {10.1016/j.resconrec.2011.10.005}
}
Dizge N, Soydemir G, Karagunduz A and Keskinler B (2011), "Influence of type and pore size of membranes on cross flow microfiltration of biological suspension", JOURNAL OF MEMBRANE SCIENCE. Vol. 366(1-2), pp. 278-285.
BibTeX:
@article{ISI:000285851600033,
  author = {Dizge, Nadir and Soydemir, Gulfem and Karagunduz, Ahmet and Keskinler, Bulent},
  title = {Influence of type and pore size of membranes on cross flow microfiltration of biological suspension},
  journal = {JOURNAL OF MEMBRANE SCIENCE},
  year = {2011},
  volume = {366},
  number = {1-2},
  pages = {278--285},
  doi = {10.1016/j.memsci.2010.10.010}
}
Kobya M, Demirbas E, Bayramoglu M and Sensoy MT (2011), "Optimization of Electrocoagulation Process for the Treatment of Metal Cutting Wastewaters with Response Surface Methodology", WATER AIR AND SOIL POLLUTION. Vol. 215(1-4), pp. 399-410.
BibTeX:
@article{ISI:000286195800032,
  author = {Kobya, Mehmet and Demirbas, E and Bayramoglu, M and Sensoy, M T},
  title = {Optimization of Electrocoagulation Process for the Treatment of Metal Cutting Wastewaters with Response Surface Methodology},
  journal = {WATER AIR AND SOIL POLLUTION},
  year = {2011},
  volume = {215},
  number = {1-4},
  pages = {399--410},
  doi = {10.1007/s11270-010-0486-x}
}
Tansel B and Dizge N (2011), "Competitive effects and interactions during sorption of SMP fractions on activated carbon: Response surface approach for visualization of sorption profiles", JOURNAL OF ENVIRONMENTAL MANAGEMENT., mar, 2011. Vol. 92(3), pp. 596-602.
BibTeX:
@article{ISI:000286782400025,
  author = {Tansel, Berrin and Dizge, Nadir},
  title = {Competitive effects and interactions during sorption of SMP fractions on activated carbon: Response surface approach for visualization of sorption profiles},
  journal = {JOURNAL OF ENVIRONMENTAL MANAGEMENT},
  year = {2011},
  volume = {92},
  number = {3},
  pages = {596--602},
  doi = {10.1016/j.jenvman.2010.09.027}
}
Dizge N and Tansel B (2011), "Multiparametric investigation of competitive and noncompetitive sorption characteristics of SMP fractions (carbohydrate and protein) on activated carbon", JOURNAL OF HAZARDOUS MATERIALS. Vol. 185(2-3), pp. 996-1004.
Abstract: Sorption characteristics of soluble microbial products (SMPs) as
carbohydrate and protein on activated carbon were investigated. Batch
experiments were conducted to evaluate the sorption kinetics and the
equilibrium conditions. The parameters studied included initial SMP
concentration (50-200 mg/L), activated carbon dosage (0.25-50 g/L),
contact time (0.02-4 h), particle size of activated carbon used (5-75
mu m, 75-850 mu m, and 850-1000 mu m), and presence of one or both SMP
fractions. The equilibrium sorption of carbohydrate and protein were
significantly affected by the presence of the second SMP fraction in
the solutions. Adsorption isotherms were expressed by the Langmuir and
Freundlich models. The adsorption rates under noncompetitive and
competitive conditions were analyzed with kinetics-based Lagergren
pseudo-first order and pseudo-second order models; and diffusion-based
external diffusion and Weber-Morris intraparticle models. Both SMP
fractions were removed effectively, however, sorption of protein was
significantly better than that of carbohydrate in all cases. The
relatively significant effect of particle size on sorption of protein
indicates that protein is most likely adsorbed as a single layer on the
carbon surface. For the carbohydrate, the increase in particle size did
not decrease the sorption significantly indicating that carbohydrate
may be adsorbed in multiple layers or may diffuse into the porous
matrix more effectively. (C) 2010 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000286782600058,
  author = {Dizge, Nadir and Tansel, Berrin},
  title = {Multiparametric investigation of competitive and noncompetitive sorption characteristics of SMP fractions (carbohydrate and protein) on activated carbon},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2011},
  volume = {185},
  number = {2-3},
  pages = {996--1004},
  doi = {10.1016/j.jhazmat.2010.10.004}
}
Akyol NH, Yolcubal I and Yuksel DI (2011), "Sorption and transport of trichloroethylene in caliche soil", CHEMOSPHERE. Vol. 82(6), pp. 809-816.
Abstract: Sorption of TCE to the caliche soil exhibited linear isotherm at the
high TCE concentrations (Co = 122-1300 mg L-1) but Freundlich isotherm
at the low concentration range (1-122 mg L-1). Sorption strength of the
carbonate fraction of the soil was about 100-fold lower than the
sorption strength of soil organic matter (SUM) in the caliche soil,
indicating weak affinity of TCE for the carbonate fraction of the soil.
Desorption of TCE from the caliche soil was initially rapid (7.6 x
10(-4) s(-1)), then continued at a 100-fold slower rate (7.7 x 10(-6)
s(-1)). Predominant calcium carbonate fraction of the soil (96%) was
responsible for the fast desorption of TCE while the SUM fraction
(0.97%) controlled the rate-limited desorption of TCE. Transport of
TCE in the caliche soil was moderately retarded with respect to the
water (R = 1.75-2.95). Flow interruption tests in the column
experiments indicated that the rate-limited desorption of TCE
controlled the non-ideal transport of TCE in the soil. Modeling studies
showed that both linear and non-linear nonequilibrium transport models
provided reasonably good match to the TCE breakthrough curves (r(2) =
0.95-0.98). Non-linear sorption had a negligible impact on both the
breakthrough curve shape and the values of sorption kinetics parameters
at the high TCE concentration (Co = 1300 mg L-1). However, rate-limited
sorption/desorption processes dominated at this concentration. For the
low TCE concentration case (110 mg L-1), in addition to the
rate-limited sorption/desorption, contribution of the non-linear
sorption to the values of sorption kinetics became fairly noticeable.
(C) 2010 Elsevier Ltd. All rights reserved.
BibTeX:
@article{ISI:000287337800003,
  author = {Akyol, Nihat Hakan and Yolcubal, Irfan and Yuksel, Derya Imer},
  title = {Sorption and transport of trichloroethylene in caliche soil},
  journal = {CHEMOSPHERE},
  year = {2011},
  volume = {82},
  number = {6},
  pages = {809--816},
  doi = {10.1016/j.chemosphere.2010.11.029}
}
Imer-Koseoglu DY, Karagunduz A and Keskinler B (2011), "Fouling characteristics of microfiltration membranes during the filtration of jet loop membrane bioreactor (JLMBR) activated sludge", DESALINATION AND WATER TREATMENT. Vol. 26(1-3), pp. 124-130.
BibTeX:
@article{ISI:000287816400018,
  author = {Imer-Koseoglu, Derya Yuksel and Karagunduz, Ahmet and Keskinler, Bulent},
  title = {Fouling characteristics of microfiltration membranes during the filtration of jet loop membrane bioreactor (JLMBR) activated sludge},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2011},
  volume = {26},
  number = {1-3},
  pages = {124--130},
  doi = {10.5004/dwt.2011.2121}
}
Ergenekon P, Gurbulak E and Keskinler B (2011), "A novel method for sulfonation of microporous polystyrene divinyl benzene copolymer using gaseous SO2 in the waste air streams", CHEMICAL ENGINEERING AND PROCESSING. Vol. 50(1), pp. 16-21.
Abstract: In this study a novel sulfonation method for microporous polystyrene
divinyl benzene copolymer (PSDBP) was introduced. In our sulfonation
system gaseous SO2 is used as the sulfonation agent and planned to be
obtained from waste gas streams. The proposed method, therefore,
combines SO2 control and clean sulfonation technology in a single
compact design.
Molded polymeric monoliths of the PSDBP containing imprisoned H2O2
solution inside the pores (PSDBPH2O2) were produced in disk shapes. Dry
gas mixture containing 3000 ppm SO2 is fed into PSDBPH2O2 disk reactor
with a flow rate of 0.8 L/min and effluent gas composition in terms of
SO2 was measured. Breakthrough curves for varied initial H2O2 amount
were used to calculate SO2 adsorption capacity and sulfonation degree
of the PSDBPH2O2 disks.
Successful sulfonation of PSDBPH2O2 was verified by the changes in its
morphological structure and formed sulfone bonds determined by SEM and
IR analyses. respectively. Maximum adsorption capacity for PSDBPH2O2
for the initial H2O2 volume percentage of 13% was determined as 57 mg
SO2/g polymer. It should be noted that SO2 adsorption was observed only
in H2O2 imprisoned polymer disks. Sulfonation degree of PSDBPH2O2 which
attained maximum SO2 amount is calculated as 10%. (C) 2010 Elsevier
B.V. All rights reserved.
BibTeX:
@article{ISI:000287903000003,
  author = {Ergenekon, Pinar and Gurbulak, Ercan and Keskinler, Bulent},
  title = {A novel method for sulfonation of microporous polystyrene divinyl benzene copolymer using gaseous SO2 in the waste air streams},
  journal = {CHEMICAL ENGINEERING AND PROCESSING},
  year = {2011},
  volume = {50},
  number = {1},
  pages = {16--21},
  doi = {10.1016/j.cep.2010.10.009}
}
Ozoner SK, Keskinler B and Erhan E (2011), "HRP immobilized microporous Poly(styrene-divinylbenzene-polyglutaraldehyde) monolith for forced flow injected phenol biosensing", MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS. Vol. 31(3), pp. 663-668.
BibTeX:
@article{ISI:000288045600023,
  author = {Ozoner, Seyda Korkut and Keskinler, Bulent and Erhan, Elif},
  title = {HRP immobilized microporous Poly(styrene-divinylbenzene-polyglutaraldehyde) monolith for forced flow injected phenol biosensing},
  journal = {MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS},
  year = {2011},
  volume = {31},
  number = {3},
  pages = {663--668},
  doi = {10.1016/j.msec.2010.12.018}
}
Ozoner SK, Yilmaz F, Celik A, Keskinler B and Erhan E (2011), "A novel poly(glycine methacrylate-co-3-thienylmethyl methacrylate)-polypyrrole-carbon nanotube-horseradish peroxidase composite film electrode for the detection of phenolic compounds", CURRENT APPLIED PHYSICS., may, 2011. Vol. 11(3), pp. 402-408.
BibTeX:
@article{ISI:000288183300024,
  author = {Ozoner, Seyda Korkut and Yilmaz, Faruk and Celik, Asuman and Keskinler, Bulent and Erhan, Elif},
  title = {A novel poly(glycine methacrylate-co-3-thienylmethyl methacrylate)-polypyrrole-carbon nanotube-horseradish peroxidase composite film electrode for the detection of phenolic compounds},
  journal = {CURRENT APPLIED PHYSICS},
  year = {2011},
  volume = {11},
  number = {3},
  pages = {402--408},
  doi = {10.1016/j.cap.2010.08.010}
}
Kobya M, Ulu F, Gebologlu U, Demirbas E and Oncel MS (2011), "Treatment of potable water containing low concentration of arsenic with electrocoagulation: Different connection modes and Fe-Al electrodes", SEPARATION AND PURIFICATION TECHNOLOGY., mar, 2011. Vol. 77(3), pp. 283-293.
BibTeX:
@article{ISI:000288738500002,
  author = {Kobya, Mehmet and Ulu, Feride and Gebologlu, Ugur and Demirbas, Erhan and Oncel, Mehmet S},
  title = {Treatment of potable water containing low concentration of arsenic with electrocoagulation: Different connection modes and Fe-Al electrodes},
  journal = {SEPARATION AND PURIFICATION TECHNOLOGY},
  year = {2011},
  volume = {77},
  number = {3},
  pages = {283--293},
  doi = {10.1016/j.seppur.2010.12.018}
}
Bektas N, Aydin S and Oncel MS (2011), "The Adsorption of Arsenic Ions Using Beidellite, Zeolite, and Sepiolite Clays: A Study of Kinetic, Equilibrium and Thermodynamics", SEPARATION SCIENCE AND TECHNOLOGY. Vol. 46(6), pp. 1005-1016.
BibTeX:
@article{ISI:000289583400015,
  author = {Bektas, Nihal and Aydin, Serkan and Oncel, M Salim},
  title = {The Adsorption of Arsenic Ions Using Beidellite, Zeolite, and Sepiolite Clays: A Study of Kinetic, Equilibrium and Thermodynamics},
  journal = {SEPARATION SCIENCE AND TECHNOLOGY},
  year = {2011},
  volume = {46},
  number = {6},
  pages = {1005--1016},
  doi = {10.1080/01496395.2010.534524}
}
Yucel Y, Demir C, Dizge N and Keskinler B (2011), "Lipase immobilization and production of fatty acid methyl esters from canola oil using immobilized lipase", BIOMASS & BIOENERGY. Vol. 35(4, Sp. Iss. SI), pp. 1496-1501.
BibTeX:
@article{ISI:000289611400012,
  author = {Yucel, Yasin and Demir, Cevdet and Dizge, Nadir and Keskinler, Bulent},
  title = {Lipase immobilization and production of fatty acid methyl esters from canola oil using immobilized lipase},
  journal = {BIOMASS & BIOENERGY},
  year = {2011},
  volume = {35},
  number = {4, Sp. Iss. SI},
  pages = {1496--1501},
  doi = {10.1016/j.biombioe.2010.12.018}
}
Tansel B and Dizge N (2011), "Multi objective performance analysis of nanofiltration process to loading parameters by response surface approach", DESALINATION., may, 2011. Vol. 272(1-3), pp. 164-169.
BibTeX:
@article{ISI:000289708200020,
  author = {Tansel, Berrin and Dizge, Nadir},
  title = {Multi objective performance analysis of nanofiltration process to loading parameters by response surface approach},
  journal = {DESALINATION},
  year = {2011},
  volume = {272},
  number = {1-3},
  pages = {164--169},
  doi = {10.1016/j.desal.2011.01.012}
}
Unsal M and Keskinler B (2011), "NON-AQUEOUS PURIFICATION OF BIODIESEL USING POLYETHYLENE GLYCOL 300", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 20(5A), pp. 1245-1251.
Abstract: According to the European Standard EN 14214, biodiesel fuels must have
significant purity values; therefore, a post transesterification
purification process is required to produce the fuel that fulfills the
standard. Until recently, water washing was conventionally preferred as
a biodiesel purification method. In this study, upon completion of the
two parallel transesterification reactions, one of the reaction mixtures
was washed with water and the other one with polyethylene glycol 300
(PEG 300), a flocculation agent, under several concentration conditions
in order to compare two different purification methods, and which of
them obtains better results. The features of biodiesel washed with PEG
300 were found to be similar to those of the other. Moreover, washing
with PEG 300 was found to provide less glycerol precipitation time than
conventional glycerol decantation. This process provided easy production
of fatty acid alkyl esters without acid neutralization and deionized
water-washing procedures that were necessary to produce a high-purity
product onto the conventional transesterification process. The new
washing process enabled low-cost production of the biodiesel from
refined vegetables.
BibTeX:
@article{ISI:000291083400003,
  author = {Unsal, Mehmet and Keskinler, Bulent},
  title = {NON-AQUEOUS PURIFICATION OF BIODIESEL USING POLYETHYLENE GLYCOL 300},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2011},
  volume = {20},
  number = {5A},
  pages = {1245--1251}
}
Engin GO, Ucar BS and Senturk E (2011), "Reuse feasibility of pre-treated grey water and domestic wastewater with a compact household reverse osmosis system", DESALINATION AND WATER TREATMENT., may, 2011. Vol. 29(1-3), pp. 103-109.
BibTeX:
@article{ISI:000291314400012,
  author = {Engin, G Onkal and Ucar, B Sinmaz and Senturk, E},
  title = {Reuse feasibility of pre-treated grey water and domestic wastewater with a compact household reverse osmosis system},
  journal = {DESALINATION AND WATER TREATMENT},
  year = {2011},
  volume = {29},
  number = {1-3},
  pages = {103--109},
  doi = {10.5004/dwt.2011.2155}
}
Kobya M, Gebologlu U, Ulu F, Oncel S and Demirbas E (2011), "Removal of arsenic from drinking water by the electrocoagulation using Fe and Al electrodes", ELECTROCHIMICA ACTA., may, 2011. Vol. 56(14), pp. 5060-5070.
BibTeX:
@article{ISI:000291907300020,
  author = {Kobya, M and Gebologlu, U and Ulu, F and Oncel, S and Demirbas, E},
  title = {Removal of arsenic from drinking water by the electrocoagulation using Fe and Al electrodes},
  journal = {ELECTROCHIMICA ACTA},
  year = {2011},
  volume = {56},
  number = {14},
  pages = {5060--5070},
  doi = {10.1016/j.electacta.2011.03.086}
}
Karagoz P and Ozkan M (2011), "Cellulolytic activities of ethanol producing anaerobic bacteria: clostridium thermocellum and a novel isolate", FEBS JOURNAL. Vol. 278(1, SI), pp. 152.
BibTeX:
@article{ISI:000292333101249,
  author = {Karagoz, P and Ozkan, M},
  title = {Cellulolytic activities of ethanol producing anaerobic bacteria: clostridium thermocellum and a novel isolate},
  journal = {FEBS JOURNAL},
  year = {2011},
  volume = {278},
  number = {1, SI},
  pages = {152}
}
Koseoglu-Imer DY, Dizge N, Karagunduz A and Keskinler B (2011), "Influence of membrane fouling reducers (MFRs) on filterability of disperse mixed liquor of Jet Loop Bioreactors", BIORESOURCE TECHNOLOGY. Vol. 102(13), pp. 6843-6849.
BibTeX:
@article{ISI:000292487300009,
  author = {Koseoglu-Imer, Derya Yuksel and Dizge, Nadir and Karagunduz, Ahmet and Keskinler, Bulent},
  title = {Influence of membrane fouling reducers (MFRs) on filterability of disperse mixed liquor of Jet Loop Bioreactors},
  journal = {BIORESOURCE TECHNOLOGY},
  year = {2011},
  volume = {102},
  number = {13},
  pages = {6843--6849},
  doi = {10.1016/j.biortech.2011.04.024}
}
Dizge N, Koseoglu-Imer DY, Karagunduz A and Keskinler B (2011), "Effects of cationic polyelectrolyte on filterability and fouling reduction of submerged membrane bioreactor (MBR)", JOURNAL OF MEMBRANE SCIENCE. Vol. 377(1-2), pp. 175-181.
BibTeX:
@article{ISI:000292580000017,
  author = {Dizge, Nadir and Koseoglu-Imer, Derya Yuksel and Karagunduz, Ahmet and Keskinler, Bulent},
  title = {Effects of cationic polyelectrolyte on filterability and fouling reduction of submerged membrane bioreactor (MBR)},
  journal = {JOURNAL OF MEMBRANE SCIENCE},
  year = {2011},
  volume = {377},
  number = {1-2},
  pages = {175--181},
  doi = {10.1016/j.memsci.2011.04.048}
}
Yuksel E, Eyvaz M, Aktas TS and Saatci AM (2011), "A New Polyelectrolyte Dosing Method: Injection into Deep Bed Filter Media", CLEAN-SOIL AIR WATER. Vol. 39(8), pp. 750-758.
BibTeX:
@article{ISI:000294720700006,
  author = {Yuksel, Ebubekir and Eyvaz, Murat and Aktas, Tugrul S and Saatci, Ahmet M},
  title = {A New Polyelectrolyte Dosing Method: Injection into Deep Bed Filter Media},
  journal = {CLEAN-SOIL AIR WATER},
  year = {2011},
  volume = {39},
  number = {8},
  pages = {750--758},
  doi = {10.1002/clen.201000277}
}
Eyvaz M, Aktas TS, Yuksel E and Saatci AM (2011), "Effects of intermittent polyelectrolyte addition on water quality in direct filtration", WATER QUALITY RESEARCH JOURNAL OF CANADA. Vol. 46(1), pp. 52-63.
BibTeX:
@article{ISI:000295029800006,
  author = {Eyvaz, Murat and Aktas, Tugrul S and Yuksel, Ebubekir and Saatci, A Mete},
  title = {Effects of intermittent polyelectrolyte addition on water quality in direct filtration},
  journal = {WATER QUALITY RESEARCH JOURNAL OF CANADA},
  year = {2011},
  volume = {46},
  number = {1},
  pages = {52--63},
  doi = {10.2166/wqrjc.2011.016}
}
Bektas N and Goksin I (2011), "Hazardous Waste Inventory in Gebze Organized Industrial Zone, Kocaeli, Turkey", ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY. Vol. 30(3), pp. 409-415.
BibTeX:
@article{ISI:000295116200017,
  author = {Bektas, N and Goksin, I},
  title = {Hazardous Waste Inventory in Gebze Organized Industrial Zone, Kocaeli, Turkey},
  journal = {ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY},
  year = {2011},
  volume = {30},
  number = {3},
  pages = {409--415},
  doi = {10.1002/ep.10498}
}
Herand BK, Oncel S and Ozkan M (2011), "Bioremoval of heavy metals from synthetic waste water by local bacterial isolates immobilized on polymeric matrix", CURRENT OPINION IN BIOTECHNOLOGY. Vol. 22(1), pp. S72.
BibTeX:
@article{ISI:000295310800203,
  author = {Herand, Binnur Kiratli and Oncel, Salim and Ozkan, Melek},
  title = {Bioremoval of heavy metals from synthetic waste water by local bacterial isolates immobilized on polymeric matrix},
  journal = {CURRENT OPINION IN BIOTECHNOLOGY},
  year = {2011},
  volume = {22},
  number = {1},
  pages = {S72},
  doi = {10.1016/j.copbio.2011.05.208}
}
Kunt ED, Naskali AT, Khalil ISM, Sabanovic A and Yuksel E (2011), "Design and development of workstation for microparts manipulation and assembly", TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES. Vol. 19(6), pp. 973-992.
BibTeX:
@article{ISI:000295497900012,
  author = {Kunt, Emrah Deniz and Naskali, Ahmet Teoman and Khalil, Islam Shoukry Mohammed and Sabanovic, Asif and Yuksel, Ebubekir},
  title = {Design and development of workstation for microparts manipulation and assembly},
  journal = {TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES},
  year = {2011},
  volume = {19},
  number = {6},
  pages = {973--992},
  doi = {10.3906/elk-1005-566}
}
Dizge N, Tansel B and Sizirici B (2011), "Process intensification with a hybrid system: A tubular packed bed bioreactor with immobilized activated sludge culture coupled with membrane filtration", CHEMICAL ENGINEERING AND PROCESSING. Vol. 50(8), pp. 766-772.
BibTeX:
@article{ISI:000295504600006,
  author = {Dizge, Nadir and Tansel, Berrin and Sizirici, Banu},
  title = {Process intensification with a hybrid system: A tubular packed bed bioreactor with immobilized activated sludge culture coupled with membrane filtration},
  journal = {CHEMICAL ENGINEERING AND PROCESSING},
  year = {2011},
  volume = {50},
  number = {8},
  pages = {766--772},
  doi = {10.1016/j.cep.2011.06.007}
}
Sulak MT and Keskinler B (2011), "DETECTION OF MALATHION USING A CARBON NANOTUBE MODIFIED GOLD ELECTRODE", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 20(10A), pp. 2744-2749.
BibTeX:
@article{ISI:000296690500014,
  author = {Sulak, Meral Topcu and Keskinler, Bulent},
  title = {DETECTION OF MALATHION USING A CARBON NANOTUBE MODIFIED GOLD ELECTRODE},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2011},
  volume = {20},
  number = {10A},
  pages = {2744--2749}
}
Tan I, Erhan E, Karagoz P and Ozkan M (2011), "Determination of mercury and nickel by amperometric biosensor prepared with thermostable lactate dehydrogenase", TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA. Vol. 21(10), pp. 2332-2338.
BibTeX:
@article{ISI:000296916100034,
  author = {Tan, Ibrahim and Erhan, Elif and Karagoz, Pinar and Ozkan, Melek},
  title = {Determination of mercury and nickel by amperometric biosensor prepared with thermostable lactate dehydrogenase},
  journal = {TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA},
  year = {2011},
  volume = {21},
  number = {10},
  pages = {2332--2338},
  doi = {10.1016/S1003-6326(11)61017-0}
}
Ozoner SK, Yalvac M and Erhan E (2010), "Flow injection determination of catechol based on polypyrrole-carbon nanotube-tyrosinase biocomposite detector", CURRENT APPLIED PHYSICS. Vol. 10(1), pp. 323-328.
Abstract: A flow injection catechol biosensor based on tyrosinase entrapped in
carbon nanotube modified polypyrrole biocomposite film on a glassy
carbon surface has been developed. Amperometric response was measured
as a function of concentration of catechol, at a fixed bias voltage of
-50 mV at a flow rate of 1 mL/min. The proposed biosensor exhibited
impressive analytical performance such as a linear range between 3 and
50 mu M, a short response time (10 s), a detection limit of 0.671 mu M
and an excellent operational (with a relative standard deviation of
0.54%) and long-term stability (85% remained after 10th week). A
comparison of the analytical parameters of the developed biosensor with
polypyrrole/tyrosinase film electrode was performed in the study. CNT
was shown to enhance the electron transfer between the electrode and
enzyme and capable to carry higher bioactivity owing to its intensified
surface area. (C) 2009 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000270584900061,
  author = {Ozoner, Seyda Korkut and Yalvac, Mevra and Erhan, Elif},
  title = {Flow injection determination of catechol based on polypyrrole-carbon nanotube-tyrosinase biocomposite detector},
  journal = {CURRENT APPLIED PHYSICS},
  year = {2010},
  volume = {10},
  number = {1},
  pages = {323--328},
  doi = {10.1016/j.cap.2009.06.017}
}
Aydiner C, Demir I, Keskinler B and Ince O (2010), "Joint analysis of transient flux behaviors via membrane fouling in hybrid PAC/MF processes using neural network", Desalination. Vol. 250(1), pp. 188-196.
BibTeX:
@article{ISI:000272830600029,
  author = {Aydiner, Coskun and Demir, Ibrahim and Keskinler, Bulent and Ince, Orhan},
  title = {Joint analysis of transient flux behaviors via membrane fouling in hybrid PAC/MF processes using neural network},
  journal = {Desalination},
  year = {2010},
  volume = {250},
  number = {1},
  pages = {188--196},
  doi = {10.1016/j.desal.2009.06.025}
}
Kobya M, Demirbas E, Dedeli A and Sensoy MT (2010), "Treatment of rinse water from zinc phosphate coating by batch and continuous electrocoagulation processes", JOURNAL OF HAZARDOUS MATERIALS. Vol. 173(1-3), pp. 326-334.
BibTeX:
@article{ISI:000273135600045,
  author = {Kobya, M and Demirbas, E and Dedeli, A and Sensoy, M T},
  title = {Treatment of rinse water from zinc phosphate coating by batch and continuous electrocoagulation processes},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2010},
  volume = {173},
  number = {1-3},
  pages = {326--334},
  doi = {10.1016/j.jhazmat.2009.08.092}
}
Can OT and Bayramoglu M (2010), "The effect of process conditions on the treatment of benzoquinone solution by electrocoagulation", JOURNAL OF HAZARDOUS MATERIALS. Vol. 173(1-3), pp. 731-736.
Abstract: The present study provides an electrocoagulation (EC) process for the
removal of p-benzoquinone (BQ) from aqueous solution using aluminium as
anode and stainless steel as cathode materials. Experiments carried out
to investigate the effects of solution pH and conductivity, current
density, time, BQ concentration on the removal efficiency of the
process and the adsorption capacity of aluminium hydroxide
electrocoagulant flocs. The results show that pH 7.5 seems to be
optimum for high removal of BQ near 90% at typical operating
conditions such as 20 A/m(2) current density and 20 min operating time.
The competing reduction of BQ to hydroquinone (HQ) accompanying the H+
reduction at the cathode and low removal extent of HQ by
electrocoagulant flocs decreases the performance of the EC process. (C)
2009 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000273135600103,
  author = {Can, O T and Bayramoglu, M},
  title = {The effect of process conditions on the treatment of benzoquinone solution by electrocoagulation},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2010},
  volume = {173},
  number = {1-3},
  pages = {731--736},
  doi = {10.1016/j.jhazmat.2009.08.146}
}
Kazanci N, Leroy SAG, Oncel S, Ileri O, Toprak O, Costa P, Sayili S, Turgut C and Kibar M (2010), "Wind control on the accumulation of heavy metals in sediment of Lake Ulubat, Anatolia, Turkey", Journal of Paleolimnology. Vol. 43(1), pp. 89-110.
BibTeX:
@article{ISI:000273162900007,
  author = {Kazanci, N and Leroy, S A G and Oncel, S and Ileri, O and Toprak, O and Costa, P and Sayili, S and Turgut, C and Kibar, M},
  title = {Wind control on the accumulation of heavy metals in sediment of Lake Ulubat, Anatolia, Turkey},
  journal = {Journal of Paleolimnology},
  year = {2010},
  volume = {43},
  number = {1},
  pages = {89--110},
  doi = {10.1007/s10933-009-9316-9}
}
Sulak MT, Erhan E and Keskinler B (2010), "Amperometric Phenol Biosensor Based on Horseradish Peroxidase Entrapped PVF and PPy Composite Film Coated GC Electrode", Applied Biochemistry and Biotechnology. Vol. 160(3), pp. 856-867.
BibTeX:
@article{ISI:000273845900018,
  author = {Sulak, Meral Topcu and Erhan, Elif and Keskinler, Buelent},
  title = {Amperometric Phenol Biosensor Based on Horseradish Peroxidase Entrapped PVF and PPy Composite Film Coated GC Electrode},
  journal = {Applied Biochemistry and Biotechnology},
  year = {2010},
  volume = {160},
  number = {3},
  pages = {856--867},
  doi = {10.1007/s12010-009-8534-y}
}
Akyol A and Bayramoglu M (2010), "Preparation and characterization of supported ZnO photocatalyst by zincate method", JOURNAL OF HAZARDOUS MATERIALS., mar, 2010. Vol. 175(1-3), pp. 484-491.
Abstract: Supported ZnO film photocatalysts are prepared on glass and ceramic
substrates by zincate method. Prepared ZnO films are seen rather
strongly durable. They resist to chemical dissolution in a broad range
of pH from 3 to 10. Various physical tests are conducted to measure the
relevant characteristics of the films. Band gap of ZnO film is
Calculated as 3.24eV. SEM analysis shows that the ZnO film has granular
morphology with uniform particle size about 300-400 nm. The film
thickness is calculated as 1.41 mu m after twenty coating cycles and
the thickness of the thin film per cycle was approximately 70 turn.
Photochemical activity tests are performed by measuring
photodecolorization rate of methyl orange solution. First order rate
constants are correlated to principal process parameters. The results
show that ceramic is the preferable supporting material with high
activity. According to simulation study, the photocatalytic activity of
film coated on ceramic ring of 8 mm diameter is nearly equal to the
activity of powder ZnO slurry of 120 mg/dm(3) density. It carried out
about decolorization 65% in 3 h. The calculations show that it is
possible to prepare ZnO film on ceramic ring with similar activity as
powder ZnO. (C) 2009 Elsevier B.V. All Fights reserved.
BibTeX:
@article{ISI:000274490400060,
  author = {Akyol, Abdurrahman and Bayramoglu, Mahmut},
  title = {Preparation and characterization of supported ZnO photocatalyst by zincate method},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2010},
  volume = {175},
  number = {1-3},
  pages = {484--491},
  doi = {10.1016/j.jhazmat.2009.10.031}
}
Senturk E, Ince M and Engin GO (2010), "Treatment efficiency and VFA composition of a thermophilic anaerobic contact reactor treating food industry wastewater", Journal of Hazardous Materials. Vol. 176(1-3), pp. 843-848.
BibTeX:
@article{ISI:000274839700115,
  author = {Senturk, E and Ince, M and Engin, G Onkal},
  title = {Treatment efficiency and VFA composition of a thermophilic anaerobic contact reactor treating food industry wastewater},
  journal = {Journal of Hazardous Materials},
  year = {2010},
  volume = {176},
  number = {1-3},
  pages = {843--848},
  doi = {10.1016/j.jhazmat.2009.11.113}
}
Senturk E, Ince M and Engin GO (2010), "Kinetic evaluation and performance of a mesophilic anaerobic contact reactor treating medium-strength food-processing wastewater", Bioresource technology. Vol. 101(11), pp. 3970-3977.
BibTeX:
@article{ISI:000275999800025,
  author = {Senturk, E and Ince, M and Engin, G Onkal},
  title = {Kinetic evaluation and performance of a mesophilic anaerobic contact reactor treating medium-strength food-processing wastewater},
  journal = {Bioresource technology},
  year = {2010},
  volume = {101},
  number = {11},
  pages = {3970--3977},
  doi = {10.1016/j.biortech.2010.01.034}
}
Ozoner SK, Erhan E, Yilmaz F, Celik A and Keskinler B (2010), "Newly synthesized poly(glycidyl methacrylate-co-3-thienylmethylmethacrylate)-based electrode designs for phenol biosensors", Talanta. Vol. 81(1-2), pp. 82-87.
BibTeX:
@article{ISI:000276052700014,
  author = {Ozoner, Seyda Korkut and Erhan, Elif and Yilmaz, Faruk and Celik, Asuman and Keskinler, Bulent},
  title = {Newly synthesized poly(glycidyl methacrylate-co-3-thienylmethylmethacrylate)-based electrode designs for phenol biosensors},
  journal = {Talanta},
  year = {2010},
  volume = {81},
  number = {1-2},
  pages = {82--87},
  doi = {10.1016/j.talanta.2009.11.040}
}
Ince M, Senturk E, Engin GO and Keskinler B (2010), "Further treatment of landfill leachate by nanofiltration and microfiltration-PAC hybrid process", Desalination., may, 2010. Vol. 255(1-3), pp. 52-60.
BibTeX:
@article{ISI:000276793600006,
  author = {Ince, M and Senturk, E and Engin, G Onkal and Keskinler, B},
  title = {Further treatment of landfill leachate by nanofiltration and microfiltration-PAC hybrid process},
  journal = {Desalination},
  year = {2010},
  volume = {255},
  number = {1-3},
  pages = {52--60},
  doi = {10.1016/j.desal.2010.01.017}
}
Sulak MT, Erhan E, Keskinler B, Yilmaz F and Celik A (2010), "Development of Amperometric Biosensor for Phenolic Compounds Using a Modified Electrode with Poly(GMA-co-MTM) and Laccase", SENSOR LETTERS. Vol. 8(2), pp. 262-267.
BibTeX:
@article{ISI:000276808500009,
  author = {Sulak, Meral Topcu and Erhan, Elif and Keskinler, Bulent and Yilmaz, Faruk and Celik, Asuman},
  title = {Development of Amperometric Biosensor for Phenolic Compounds Using a Modified Electrode with Poly(GMA-co-MTM) and Laccase},
  journal = {SENSOR LETTERS},
  year = {2010},
  volume = {8},
  number = {2},
  pages = {262--267},
  doi = {10.1166/sl.2010.1260}
}
Etci O, Bektas N and Oncel MS (2010), "Single and binary adsorption of lead and cadmium ions from aqueous solution using the clay mineral beidellite", ENVIRONMENTAL EARTH SCIENCES. Vol. 61(2), pp. 231-240.
Abstract: Beidellite, a low-cost, locally available and natural mineral was used
as an adsorbent for the removal of lead and cadmium ions from aqueous
solutions in batch experiments. The kinetics of adsorption process was
tested for the pseudo first-order, pseudo second-order reaction and
intra-particle diffusion models. The rate constants of adsorption for
all these kinetic models were calculated. Comparison amongst the models
showed that the sorption kinetics was best described by the pseudo
second-order model. Langmuir and Freundlich isotherm models were
applied to the experimental equilibrium data for different
temperatures. The adsorption capacities (QA degrees) of beidellite for
lead and cadmium ions were calculated from the Langmuir isotherm. It
was found that adsorption capacity was in the range of 83.3-86.9 for
lead and 42-45.6 mg/g for cadmium at different temperatures.
Thermodynamic studies showed that the metal uptake reaction by
beidellite was endothermic in nature. Binary metal adsorption studies
were also conducted to investigate the interactions and competitive
effects in binary adsorption process. Based on the optimum parameters
found, beidellite can be used as adsorbent for metal removal processes.
BibTeX:
@article{ISI:000279080600002,
  author = {Etci, Ozlem and Bektas, Nihal and Oncel, M Salim},
  title = {Single and binary adsorption of lead and cadmium ions from aqueous solution using the clay mineral beidellite},
  journal = {ENVIRONMENTAL EARTH SCIENCES},
  year = {2010},
  volume = {61},
  number = {2},
  pages = {231--240},
  doi = {10.1007/s12665-009-0338-4}
}
Akyol A and Bayramoglu M (2010), "Photocatalytic performance of ZnO coated tubular reactor", JOURNAL OF HAZARDOUS MATERIALS. Vol. 180(1-3), pp. 466-473.
Abstract: The recovery of photocatalyst particles constitutes a serious drawback
of slurry reactors. Therefore, depositing the catalyst mass on a
suitable support without loss of photocatalytic activity is of
practical importance. In this study, a chemical deposition method was
applied to coat the inner surface of quartz tubes of various diameters
with thin ZnO film. The method is economical, energy efficient and easy
to apply. ZnO film is mechanically durable and resistant to chemical
dissolution. Various physical tests were conducted to characterize the
film. ZnO thin film exhibits the crystal wurtzite structure with band
gap calculated as 3.24 eV. The film exhibits highly hydrophilic
behavior. The average ZnO crystallite size is estimated as 72 nm. SEM
analysis shows that the ZnO film has granular morphology with uniform
particle size of about 300-400 nm. The film thickness is calculated as
1.41 mu m after 20 coating cycles and the increase of the thickness of
the thin film per cycle was approximately 70 nm. Photochemical activity
tests were performed by measuring photo decolorization rate of a
commercial azo dye (Rem Red F3B) solution in tubular reactor and as
well as in slurry reactor for comparative purpose. First order rate
constants were correlated to principal process parameters. The results
showed that thin ZnO film has high photocatalytic activity comparable
to that of ZnO powder. Crown Copyright (C) 2010 Published by Elsevier
B.V. All rights reserved.
BibTeX:
@article{ISI:000279459600059,
  author = {Akyol, Abdurrahman and Bayramoglu, Mahmut},
  title = {Photocatalytic performance of ZnO coated tubular reactor},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2010},
  volume = {180},
  number = {1-3},
  pages = {466--473},
  doi = {10.1016/j.jhazmat.2010.04.053}
}
Arslan-Alaton I, Gursoy BH, Akyol A, Kobya M and Bayramoglu M (2010), "Modeling and optimization of acid dye manufacturing wastewater treatment with Fenton's reagent: comparison with electrocoagulation treatment results and effects on activated sludge inhibition", WATER SCIENCE AND TECHNOLOGY. Vol. 62(1), pp. 209-216.
BibTeX:
@article{ISI:000279810700028,
  author = {Arslan-Alaton, Idil and Gursoy, B Hande and Akyol, Abdurahman and Kobya, Mehmet and Bayramoglu, Mahmut},
  title = {Modeling and optimization of acid dye manufacturing wastewater treatment with Fenton's reagent: comparison with electrocoagulation treatment results and effects on activated sludge inhibition},
  journal = {WATER SCIENCE AND TECHNOLOGY},
  year = {2010},
  volume = {62},
  number = {1},
  pages = {209--216},
  doi = {10.2166/wst.2010.256}
}
Meric E, Avsar N, Nazik A, Barut IF, Bergin F, Balkis N, Oncel MS and Kapan-Yesilyurt S (2010), "The response of benthic foraminifer, ostracod and mollusc assemblages to environmental conditions: a case study from the Camalti Saltpan (Izmir-Western Turkey)", MEDITERRANEAN MARINE SCIENCE. Vol. 11(1), pp. 5-32.
Abstract: The subject of this report is benthic foraminifer populations preserved
in the saltpan of Camalti in the Province of Izmir. High salinity in
certain habitats of Ammonia tepida Cushman may be the primary cause of
the high rate of twins and triplets as well as other morphological
abnormalities recorded within this species (50 % as compared to an
anomaly rate of 1 % in normal marine waters). Thicker cyst membrane
developing in extremely saline environments may encourage twins and
other morphological deformities by denying free movement of the
offspring. Ecological factors such as heavy metal contamination of
ambient waters as well as contamination by other wastes are also not
ruled out as leading to such developmental anomalies. Of the 27
collected samples, Number 5 (that is closest to the sea) includes the
typical marine foraminifers. Nonion depressulum (Walker and Jacob),
Ammonia tepida Cushman and Porosononion subgronosum (Egger) are the
dominant species in other samples. A total of 63 abnormal individuals
(8 triplets, 24 twins, and 31 morphological anomalies) was found within
seven of the 27 samples collected. Ten samples contained freshwater
ostracods: Darwinula stevensoni (Brady and Robertson), Leptocythere
lacertosa Hirschmann, Cyprideis torosa (Jones), Cyprideis (C.)
anatolica Bassiouni, and Laxochoncha elliptica Brady. Among these
samples (some of which contained only a few species of ostracods and
those limited in number of offspring), one had an unusually high ratio
of healthy foraminifers those with anomalies. Worthy of note in another
sample was a high abundance of molluscs. Among pelecypods, were found
()sum edulis Linne, Lucinella divaricata (Linne), Pseudocama gryphina
Lamarck, Cerastoderma Mule (Untie), and Scrobicularia plana da Costa;
and among gastropods were identified Hydrobia (Hydrobia) acuta
(Draparnaud), Rissoa labiosa (Montagu), R. parva (da Costa), R.
violacea Desmarest. Pirenella conica (Blainville). Bittium desayesi
(Cerulli and Irelli), B. lactewn Philippi and B. reficulatum Philippi.
BibTeX:
@article{ISI:000280222900001,
  author = {Meric, E and Avsar, N and Nazik, A and Barut, I F and Bergin, F and Balkis, N and Oncel, M S and Kapan-Yesilyurt, S},
  title = {The response of benthic foraminifer, ostracod and mollusc assemblages to environmental conditions: a case study from the Camalti Saltpan (Izmir-Western Turkey)},
  journal = {MEDITERRANEAN MARINE SCIENCE},
  year = {2010},
  volume = {11},
  number = {1},
  pages = {5--32}
}
Aydiner C (2010), "A novel approach based on distinction of actual and pseudo resistances in membrane fouling: ``Pseudo resistance'' concept and its implementation in nanofiltration of single solutions", JOURNAL OF MEMBRANE SCIENCE. Vol. 361(1-2), pp. 96-112.
BibTeX:
@article{ISI:000280974600012,
  author = {Aydiner, Coskun},
  title = {A novel approach based on distinction of actual and pseudo resistances in membrane fouling: ``Pseudo resistance'' concept and its implementation in nanofiltration of single solutions},
  journal = {JOURNAL OF MEMBRANE SCIENCE},
  year = {2010},
  volume = {361},
  number = {1-2},
  pages = {96--112},
  doi = {10.1016/j.memsci.2010.06.003}
}
Aydiner C, Kaya Y, Gonder ZB and Vergili I (2010), "Evaluation of membrane fouling and flux decline related with mass transport in nanofiltration of tartrazine solution", JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. Vol. 85(9), pp. 1229-1240.
Abstract: BACKGROUND: This work was carried out to investigate and analyze the
interrelated dynamics of mass transport, membrane fouling and flux
decline during nanofiltration of tartrazine. A combined application
including pore diffusion transport model and a material balance
approach was used to model an experimental flux data obtained from
different values of pH (3, 5, 7 and 10), feed-dye concentration (25,
100 and 400 mg L-1), and transmembrane pressure (1200, 1800 and 2400
kPa).
RESULTS: Almost 100% dye solution removal and a permeate flux of 135 L
m(-2) h(-1) were obtained for 25 mg L-1 and 1200 kPa at pH 10. At pH
10, lower membrane fouling was obtained due to the increase of
electrostatic repulsion between anionic dye molecules and the more
negatively charged membrane surface. Flux decline and membrane fouling
increased together with transmembrane pressure and dye concentration.
Fouling was found to be directly related to proportional-permeation
coefficient (k(O)') of dye which was identified as the solute passing
into the permeate with respect to the amount transported into the
membrane from the feed.
CONCLUSIONS: For a decrease of pH (10 to 3) and transmembrane pressure
(2400 to 1200 kPa) or an increase of feed-dye concentration (25 to 400
mg L-1), fewer dye molecules passed into the permeate with respect to
the amount transported into the membrane from the feed. This situation
depended mainly on the combined influences of the gel layer and fouling
in the membrane. (C) 2010 Society of Chemical Industry
BibTeX:
@article{ISI:000281458400007,
  author = {Aydiner, Coskun and Kaya, Yasemin and Gonder, Zeren Beril and Vergili, Ilda},
  title = {Evaluation of membrane fouling and flux decline related with mass transport in nanofiltration of tartrazine solution},
  journal = {JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY},
  year = {2010},
  volume = {85},
  number = {9},
  pages = {1229--1240},
  doi = {10.1002/jctb.2422}
}
Han GSA, Bektas N and Oncel MS (2010), "Separate collection practice of packaging waste as an example of Kucukcekmece, Istanbul, Turkey", RESOURCES CONSERVATION AND RECYCLING. Vol. 54(12), pp. 1317-1321.
Abstract: Turkey was required to put compatible legislation on packaging waste
management in accordance with EC directives. These legal directives
forced the local authorities to carry out separate collection projects
for packaging waste all over the country. Packaging Waste Separate
Collection Program ``PWSCP'' for Kucukcekmece District, Istanbul,
Turkey was evaluated within the framework of the local governments'
legislation in this study. The implementation of the project using the
informative and educative seminars, initial collection practises and
initial findings was technically and socially evaluated with respect to
local awareness. This program involves separate collection of
recyclable packaging materials, whereby households are requested to
sort their packaging waste and local authorities are in charge for
collection and follow-up. The initials results were presented using the
amount and contents of packaging waste collected in the area. This new
and functional project's future stages were also briefly given. A
survey was conducted to analyze satisfaction and recycling level of the
households. The results showed that this project was successfully
implemented in the area. (C) 2010 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000281752400033,
  author = {Han, Gul S Akcay and Bektas, Nihal and Oncel, M Salim},
  title = {Separate collection practice of packaging waste as an example of Kucukcekmece, Istanbul, Turkey},
  journal = {RESOURCES CONSERVATION AND RECYCLING},
  year = {2010},
  volume = {54},
  number = {12},
  pages = {1317--1321},
  doi = {10.1016/j.resconrec.2010.05.007}
}
Kobya M, Demirbas E and Sozbir M (2010), "Decolorisation of aqueous reactive dye Remazol Red 3B by electrocoagulation", COLORATION TECHNOLOGY. Vol. 126(5), pp. 282-288.
BibTeX:
@article{ISI:000281849800006,
  author = {Kobya, Mehmet and Demirbas, Erhan and Sozbir, Mustafa},
  title = {Decolorisation of aqueous reactive dye Remazol Red 3B by electrocoagulation},
  journal = {COLORATION TECHNOLOGY},
  year = {2010},
  volume = {126},
  number = {5},
  pages = {282--288},
  doi = {10.1111/j.1478-4408.2010.00259.x}
}
Akyol A and Bayramoglu M (2010), "Performance comparison of ZnO photocatalyst in various reactor systems", JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. Vol. 85(11), pp. 1455-1462.
Abstract: BACKGROUND: Owing to difficulties in catalyst recovery from slurries
the deposition of a catalyst on suitable supports has been investigated
extensively in recent years. The support material and the method of
coating influence the activity. Photocatalytic decolorization of methyl
orange (MO) and Rem Red F3B (RRF3B) was conducted in various reactor
systems including a slurry reactor, ZnO thin film coated tube reactor
and fixed bed reactor filled with ZnO coated ceramic or glass supports
of various geometries.
RESULTS: ZnO coating was carried out by the ammonium zincate deposition
method. ZnO thin films were quite stable in acidic and basic media and
resistant to photocorrosion. Various methods including scanning
electron microscopy (SEM) and X-ray diffraction (XRD) were applied for
the physical characterization of thin films. The XRD patterns of ZnO
thin film exhibit a wurtzite (zincite) crystal structure. SEM analysis
revealed the granular morphology of ZnO film with a particle size of
300-400 nm.
CONCLUSION: Photocatalytic activities were determined kinetically by
calculating first-order rate constants, which were also related to
process variables by regression analysis. From the viewpoint of
decolorization efficiency, the coated tube reactor (6 mm i.d.) showed
the highest activity, which was equal to that of a powder catalyst
loading of 300 mg dm(-3) for MO and of 200 mg dm(-3) for RRF3B. (C)
2010 Society of Chemical Industry
BibTeX:
@article{ISI:000283631600004,
  author = {Akyol, Abdurrahman and Bayramoglu, Mahmut},
  title = {Performance comparison of ZnO photocatalyst in various reactor systems},
  journal = {JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY},
  year = {2010},
  volume = {85},
  number = {11},
  pages = {1455--1462},
  doi = {10.1002/jctb.2449}
}
Kobya M, Demirbas E, Parlak NU and Yigit S (2010), "Treatment of cadmium and nickel electroplating rinse water by electrocoagulation", ENVIRONMENTAL TECHNOLOGY. Vol. 31(13, Sp. Iss. SI), pp. 1471-1481.
Abstract: Treatments of cadmium-cyanide and nickel-cyanide electroplating rinse
water were investigated in an electrochemical reactor equipped with
iron plate electrodes in a batch mode by electrocoagulation (EC).
Effects of the process variables such as pH, current density, and
operating time were explored with respect to removal efficiencies of
cadmium, nickel and cyanide in electroplating rinse water and operating
costs as well. Removal efficiencies and operating costs under the
optimum conditions (30 A/m2, 30 min and pH 8-10 for cadmium; 60 A/m2,
80 min and pH 8-10 for nickel) for the EC process in electroplating
rinse water were determined as 99.4% and 1.05 /m3 for cadmium, 99.1%
and 2.45 /m3 for nickel and 99.7% for cyanide, respectively. The
results indicated that EC was very effective treatment for the removals
of cadmium, nickel, and cyanide ions from the electroplating rinse
water.
BibTeX:
@article{ISI:000283872000008,
  author = {Kobya, M and Demirbas, E and Parlak, N U and Yigit, S},
  title = {Treatment of cadmium and nickel electroplating rinse water by electrocoagulation},
  journal = {ENVIRONMENTAL TECHNOLOGY},
  year = {2010},
  volume = {31},
  number = {13, Sp. Iss. SI},
  pages = {1471--1481},
  doi = {10.1080/09593331003713693}
}
Say ANO, Sivri N, Erturk A, Seker DZ and Fusheng L (2010), "ANALYSIS OF PHYTOPLANKTON DISTRIBUTION AT THE SOUTH-WESTERN COAST OF ISTANBUL UTILIZING GIS", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 19(9B, Sp. Iss. SI), pp. 2116-2122.
Abstract: Marmara Sea, located between the European and Asian continents, is an
important aquatic ecosystem for Turkey Together with the Bosphorus and
the Dardanelles, it forms the Turkish Strait System that is an
internationally important waterway From the ecological viewpoint,
Marmara Sea is under high stress because of the municipal, industrial
and agricultural sources of pollution as well as the intensive maritime
activities, and is at risk of extensive environmental deterioration
because of eutrophication The mostly populated districts of Istanbul
are located at the coastal areas of the Marmara Sea In this study,
chlorophyll-a and phytoplankton were monitored at the southwestern
coast of Istanbul Phytoplankton species were analyzed quantitatively In
general, Bacillariophyceae were found to be dominant in all the
monitoring stations Cyano phyceae and Dinophyceae abundance has
increased in spring Seasonal variation in phytoplankton succession was
found to be related to temperature In this study, besides from
bloom-forming Gymnodinium spp as Dinoflagellate members, other
Dinoflagellates (Prorocentrum micans and Ceratium furca) were observed
as harmful algal bloom-forming species All the results obtained by data
analysis were visualized using Geographical Information System (GIS) as
an initial effort to develop a local phytoplanktonic species atlas
which will be important for environmental management
BibTeX:
@article{ISI:000284394100021,
  author = {Say, Ayse Neslihan Ozman and Sivri, Nuket and Erturk, Ali and Seker, Dursun Zafer and Fusheng, Li},
  title = {ANALYSIS OF PHYTOPLANKTON DISTRIBUTION AT THE SOUTH-WESTERN COAST OF ISTANBUL UTILIZING GIS},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2010},
  volume = {19},
  number = {9B, Sp. Iss. SI},
  pages = {2116--2122}
}
Dizge N and Tansel B (2010), "External mass transfer analysis for simultaneous removal of carbohydrate and protein by immobilized activated sludge culture in a packed bed batch bioreactor", JOURNAL OF HAZARDOUS MATERIALS. Vol. 184(1-3), pp. 671-677.
Abstract: External mass transfer effects were analyzed for removal of
carbohydrate and protein by immobilized activated sludge culture in a
packed bed bioreactor. The bioreactor was made from 52 cm glass tubing
with 5.0 cm inner diameter (with a total volume of 1020 cm(3)). The
microbial culture was immobilized on microporus polyurethane cut into
cubic pieces of approximately 1.5 cm in length. The effect of flow rate
on mass transfer and removal of carbohydrate and protein were analyzed
theoretically and compared with experimental data. The rate constants
were estimated using external film diffusion models at different flow
rates (900, 1200, 1800 cm(3) h(-1)). Based on the experimental data,
correlations between the Colburn factor (J(D)) and Reynolds number (Re)
as J(D) = 5.7 x Re-.90 and J(D) = 5.7 x Re-0.18 were found to be
adequate to predict the removal of carbohydrate and protein,
respectively. (C) 2010 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000284504800089,
  author = {Dizge, Nadir and Tansel, Berrin},
  title = {External mass transfer analysis for simultaneous removal of carbohydrate and protein by immobilized activated sludge culture in a packed bed batch bioreactor},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2010},
  volume = {184},
  number = {1-3},
  pages = {671--677},
  doi = {10.1016/j.jhazmat.2010.08.090}
}
Dogan O and Karpuzcu M (2010), "Recovery of Phosphate Sludge as Concrete Supplementary Material", CLEAN-SOIL AIR WATER. Vol. 38(10), pp. 977-980.
Abstract: The automotive industry plays a major role in the worldwide economy and
represents an opportunity to increase the performance of the Turkish
economy Phosphating units in the automotive manufacturing plants
generate phosphate sludge as waste which is classified as hazardous
waste in the European Waste Catalogue Phosphate sludge must be disposed
of in licensed disposal plants according to the current environmental
regulations Solidification/stabilization (S/S) is a widely used
treatment technology for the disposal of hazardous wastes Portland
cement is used for the solidification and stabilization processes to
immobilize Ni and Zn in the phosphate sludge as well as to create
construction material to be used as cobble stone for pavement
Examination of products obtained by S/S processes is performed for two
points to determine the quality and to assess the environmental impacts
The phosphate sludge samples are subjected to chemical characterization
and a size distribution analysis leaching test Concrete for cobble stone
was produced by the S/S process with the addition of phosphate sludge to
replace sand Tests for the quality of the product were carried out to
determine compressive strength permeability and elasticity At the end of
the leaching test elution concentrations of Zn and Ni while using water
with pH values of 4 0 5 4 and 9 0 were determined to be under the limit
of inert material properties Use of phosphate sludge should be
considered as a sand replacement in the proportion of 1% of phosphate
sludge to cement in concrete production such as for cobble stone for
pavement without any adverse environmental impacts
BibTeX:
@article{ISI:000284680200010,
  author = {Dogan, Ozgur and Karpuzcu, Mehmet},
  title = {Recovery of Phosphate Sludge as Concrete Supplementary Material},
  journal = {CLEAN-SOIL AIR WATER},
  year = {2010},
  volume = {38},
  number = {10},
  pages = {977--980},
  doi = {10.1002/clen.201000194}
}
Eyvaz M, Deniz H, Aktas TS, Yuksel E and Saatci AM (2010), "Pre-Ozonation-Coagulant Interactions in Direct Filtration", WATER QUALITY RESEARCH JOURNAL OF CANADA. Vol. 45(3), pp. 317-326.
BibTeX:
@article{ISI:000295028600005,
  author = {Eyvaz, Murat and Deniz, Hatice and Aktas, Tugrul S and Yuksel, Ebubekir and Saatci, Ahmet M},
  title = {Pre-Ozonation-Coagulant Interactions in Direct Filtration},
  journal = {WATER QUALITY RESEARCH JOURNAL OF CANADA},
  year = {2010},
  volume = {45},
  number = {3},
  pages = {317--326}
}
Karagoez P, Erhan E, Keskinler B and Oezkan M (2009), "The Use of Microporous Divinyl Benzene Copolymer for Yeast Cell Immobilization and Ethanol Production in Packed-Bed Reactor", APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY. Vol. 152(1), pp. 66-73.
Abstract: Microporous divinyl benzene copolymer (MDBP) was used for the first
time as immobilization material for Saccharomyces cerevisiae ATCC 26602
cells in a bed reactor and ethanol production from glucose was studied
as a model system. A very homogenous thick layer of yeast cells were
seen from the scanning electron micrographs on the outer walls of
biopolymer. The dried weight of the cells was found to be approximately
2 g per gram of cell supporting material. Hydrophobic nature of polymer
is an important factor increasing cell adhesion on polymer pieces. The
dynamic flow conditions through the biomaterial due to its microporous
architecture prevented exopolysaccharide matrix formation around cells
and continuous washing out of toxic metabolites and dead and degraded
cells from the reactor provided less diffusional limitations and
dynamic living environment to the cells. In order to see the ethanol
production performance of immobilized yeast cells, a large initial
concentration range of glucose between 6.7 and 300 g/l was studied at 1
ml/min in continuous packed-bed reactor. The inhibition effect of
glucose with increasing initial concentration was observed at above 150
g/l, a relatively high substrate concentration. The continuous fluid
flow around the microenvironment of the attached cells and mass
transferring ability of cell immobilized on MDBP can help in decreasing
the inhibition effect of ethanol accumulation and high substrate
concentration in the vicinity of the cells.
BibTeX:
@article{ISI:000262280600007,
  author = {Karagoez, Pinar and Erhan, Elif and Keskinler, Bulent and Oezkan, Melek},
  title = {The Use of Microporous Divinyl Benzene Copolymer for Yeast Cell Immobilization and Ethanol Production in Packed-Bed Reactor},
  journal = {APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY},
  year = {2009},
  volume = {152},
  number = {1},
  pages = {66--73},
  doi = {10.1007/s12010-008-8336-7}
}
Uyar G, Avcil E, Oren M, Karaca F and Oncel MS (2009), "Determination of Heavy Metal Pollution in Zonguldak (Turkey) by Moss Analysis (Hypnum cupressiforme)", ENVIRONMENTAL ENGINEERING SCIENCE. Vol. 26(1), pp. 183-194.
Abstract: This paper explores the first attempt at determining the levels of
atmospheric heavy metal contamination in the Zonguldak province through
the analysis of moss (Hypnum cupressiforme Hedw.). Sampling was
performed at 24 sites after a wet period to avoid contamination from
soil compounds in the province. Dried samples, which were unwashed but
cleaned of soil particles and other extraneous material, were digested
with HNO3/HClO4. Concentrations of heavy metals (Fe, Cu, Pb, Cr, Co,
Ni, and As) were analyzed by ICP-OES to estimate the geographic
distribution of the atmospheric heavy metal depositions. The general
order of the concentrations of the heavy metal content in Hypnum
cupressiforme Hedw. was observed to be Fe textgreater Pb textgreater Cu textgreater Ni textgreater Cr textgreater As textgreater
Co. Mean levels of the measured elements were higher when compared to
European levels. Arsenic, iron, and chromium were the most elevated
elements when compared with European data. The mean concentrations of
these elements in the studied area were 8.3 (Co), 6.7 (Fe), 5.2 (Cr),
4.6 (As), and 2.7 (Ni) times the background levels of the reference
site (C3). Among the studied heavy metals, only lead showed little
variation in measured values due to traffic in the area. Main sources
of increased heavy metal content of the moss samples were found to be:
i) the Catalagzi Power Plant (CATES); ii) the Eregli Iron-Steel Plant
(ERDEMIR); iii) space heating; and iv) traffic-related emissions.
Results are presented in the form of color-scaled contour maps using a
Geographic Information System (GIS)-based mapping technique.
BibTeX:
@article{ISI:000262495900020,
  author = {Uyar, Gueray and Avcil, Elif and Oren, Muhammet and Karaca, Ferhat and Oncel, Mehmet Salim},
  title = {Determination of Heavy Metal Pollution in Zonguldak (Turkey) by Moss Analysis (Hypnum cupressiforme)},
  journal = {ENVIRONMENTAL ENGINEERING SCIENCE},
  year = {2009},
  volume = {26},
  number = {1},
  pages = {183--194},
  doi = {10.1089/ees.2007.0253}
}
Aydiner C, Bayramoglu M, Keskinler B and Ince O (2009), "Nickel Removal from Waters Using a Surfactant-Enhanced Hybrid Powdered Activated Carbon/Microfiltration Process. II. The Influence of Process Variables", INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. Vol. 48(2), pp. 903-913.
BibTeX:
@article{ISI:000262677900043,
  author = {Aydiner, Coskun and Bayramoglu, Mahmut and Keskinler, Bulent and Ince, Orhan},
  title = {Nickel Removal from Waters Using a Surfactant-Enhanced Hybrid Powdered Activated Carbon/Microfiltration Process. II. The Influence of Process Variables},
  journal = {INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH},
  year = {2009},
  volume = {48},
  number = {2},
  pages = {903--913},
  doi = {10.1021/ie8004308}
}
Dizge N, Aydiner C, Imer DY, Bayramoglu M, Tanriseven A and Keskinlera B (2009), "Biodiesel production from sunflower, soybean, and waste cooking oils by transesterification using lipase immobilized onto a novel microporous polymer", BIORESOURCE TECHNOLOGY., mar, 2009. Vol. 100(6), pp. 1983-1991.
BibTeX:
@article{ISI:000262750000015,
  author = {Dizge, Nadir and Aydiner, Coskun and Imer, Derya Y and Bayramoglu, Mahmut and Tanriseven, Aziz and Keskinlera, Buelent},
  title = {Biodiesel production from sunflower, soybean, and waste cooking oils by transesterification using lipase immobilized onto a novel microporous polymer},
  journal = {BIORESOURCE TECHNOLOGY},
  year = {2009},
  volume = {100},
  number = {6},
  pages = {1983--1991},
  doi = {10.1016/j.biortech.2008.10.008}
}
Danis U and Aydiner C (2009), "Investigation of process performance and fouling mechanisms in micellar-enhanced ultrafiltration of nickel-contaminated waters", JOURNAL OF HAZARDOUS MATERIALS., mar, 2009. Vol. 162(2-3), pp. 577-587.
Abstract: Nickel removal from aqueous solution by micellar-enhanced
ultrafiltration (MEUF) with relatively low transmembrane pressures was
investigated at varying conditions of sodium lauryl ether sulfate
(SLES) and nickel concentrations, transmembrane pressure and sodium
chloride content. Process employed in continuous filtration mode, could
be operated within a short time of 30 min presenting high rejection of
nickel and SLES at high transient fluxes. Under the effect of
increasing transmembrane pressure, the rejection of nickel and SLES
increased, but the transient flux decreased. The existence of salt
caused to decrease both rejections and flux. Nickel rejection, SLES
rejection and flux were establihed as 98.6%, 75.7% and 0.304
m(3)/m(2) h, respectively, for the conditions of surfactant to metal
(SIM) ratio of 10 (SLES = 2 mM), transmembrane pressure of 250 kPa
without NaCl content at the end of 90-min operation time. The analyses
related to the membrane fouling were carried out using adsorptive
fouling models. It has been determined that, the fouling occurs as a
dynamic function of various process conditions studied, and depends
strongly on mechanisms controlled by the formation of gel layer and its
bridging over the pore entrances simultaneously together with partial
constriction of membrane pores by surfactant adsorption. (C) 2008
Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000263370200001,
  author = {Danis, Ummuhan and Aydiner, Coskun},
  title = {Investigation of process performance and fouling mechanisms in micellar-enhanced ultrafiltration of nickel-contaminated waters},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2009},
  volume = {162},
  number = {2-3},
  pages = {577--587},
  doi = {10.1016/j.jhazmat.2008.05.098}
}
Bayar S, Demir I and Engin GO (2009), "Modeling leaching behavior of solidified wastes using back-propagation neural networks", ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY., mar, 2009. Vol. 72(3), pp. 843-850.
Abstract: In a previous study, treatment sludge obtained from a chemical
industry, which contained potentially toxic heavy metals and organics,
was characterized and solidified by solidification/stabilization (S/S).
In this study, however, the prediction of leaching behavior of the
sludge by linear regression method and neural networks (NNs) was
discussed. NN analysis was used to construct models of leaching
behavior as a function of mix composition (waste/binder ratio, W/B)
using existing data from the previous study of cement-based S/S. The
differences in leaching rate of each metal were also considered. The
hazard characteristics of the waste were determined as defined in both
Turkish and US EPA regulations, by means of Extraction Procedure
Toxicity Test (EPTox) and DIN 38414-S4 Test. S/S studies were conducted
using Portland cement to solidify the sludge containing high amount of
Cr, Cu, Hg, Ni, Pb, and Zn. The W/B ratios of 36 specimens were kept
between 0/100 and 40/100. The specimens were cured at room temperature
for 7, 28, and 90 days. The heavy metal content of the extracts of each
specimen was detected usually less than standard concentrations in
EPTox and DIN 38414-S4 leaching procedures. By the use of NN, leaching
behavior of the solidified wastes can be predicted and, therefore,
optimum S/S technologies can be achieved. (c) 2007 Elsevier Inc. All
rights reserved.
BibTeX:
@article{ISI:000263762100025,
  author = {Bayar, Senem and Demir, Ibrahim and Engin, Guleda Onkal},
  title = {Modeling leaching behavior of solidified wastes using back-propagation neural networks},
  journal = {ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY},
  year = {2009},
  volume = {72},
  number = {3},
  pages = {843--850},
  doi = {10.1016/j.ecoenv.2007.10.019}
}
Ozturk ZZ, Tasaltin C, Engin GO, Gurek AG, Atilla D, Ahsen V and Ince M (2009), "Evaluation of a fast wastewater odour characterisation procedure using a chemical sensor array", ENVIRONMENTAL MONITORING AND ASSESSMENT. Vol. 151(1-4), pp. 369-375.
BibTeX:
@article{ISI:000263832800035,
  author = {Ozturk, Zafer Ziya and Tasaltin, Cihat and Engin, Gueleda Oenkal and Gurek, Ayse Gul and Atilla, Devrim and Ahsen, Vefa and Ince, Mahir},
  title = {Evaluation of a fast wastewater odour characterisation procedure using a chemical sensor array},
  journal = {ENVIRONMENTAL MONITORING AND ASSESSMENT},
  year = {2009},
  volume = {151},
  number = {1-4},
  pages = {369--375},
  doi = {10.1007/s10661-008-0278-6}
}
Basar CA, Aydiner C, Kara S and Keskinler B (2009), "Removal of Copper Ions from Waters Using Surfactant-Enhanced Hybrid PAC/MF Process", JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE. Vol. 135(4), pp. 250-258.
BibTeX:
@article{ISI:000264155000007,
  author = {Basar, Canan Akmil and Aydiner, Coskun and Kara, Serdar and Keskinler, Bulent},
  title = {Removal of Copper Ions from Waters Using Surfactant-Enhanced Hybrid PAC/MF Process},
  journal = {JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE},
  year = {2009},
  volume = {135},
  number = {4},
  pages = {250--258},
  doi = {10.1061/(ASCE)0733-9372(2009)135:4(250}
}
Dizge N, Keskinler B and Tanriseven A (2009), "Biodiesel production from canola oil by using lipase immobilized onto hydrophobic microporous styrene-divinylbenzene copolymer", BIOCHEMICAL ENGINEERING JOURNAL., may, 2009. Vol. 44(2-3), pp. 220-225.
BibTeX:
@article{ISI:000264903900018,
  author = {Dizge, Nadir and Keskinler, Buelent and Tanriseven, Aziz},
  title = {Biodiesel production from canola oil by using lipase immobilized onto hydrophobic microporous styrene-divinylbenzene copolymer},
  journal = {BIOCHEMICAL ENGINEERING JOURNAL},
  year = {2009},
  volume = {44},
  number = {2-3},
  pages = {220--225},
  doi = {10.1016/j.bej.2008.12.008}
}
Demirbas E, Dizge N, Sulak MT and Kobya M (2009), "Adsorption kinetics and equilibrium of copper from aqueous solutions using hazelnut shell activated carbon", CHEMICAL ENGINEERING JOURNAL., may, 2009. Vol. 148(2-3), pp. 480-487.
Abstract: The adsorption of Cu(II) ions from aqueous solutions by hazelnut shell
activated carbon (HSAC) was studied in a batch adsorption system.
Factors influencing copper adsorption such as initial copper ion
concentration (25-200 mg L-1), pH (2-6), adsorbent dosage (0.5-3.0 g
L-1) and temperature (293-323 K) were investigated. The adsorption
process was relatively fast and equilibrium was established about 90
min. Maximum adsorption of Cu(II) ions occurred at around pH 6. A
comparison of the kinetic models on the overall adsorption rate showed
that the adsorption system was best described by the pseudo
second-order kinetics. Desorption experiments were carried out to test
the performance of the carbon and desorption efficiencies in four
cycles were found to be in the range 74-79%. The adsorption
equilibrium data fitted best with the Langmuir isotherm and the
monolayer adsorption capacity of Cu(II) ions was determined as 58.27 mg
g(-1) at 323 K. Thermodynamic parameters were calculated for the Cu(II)
ion-HSAC system and the positive value of OH (18.77 kJ mol(-1)) showed
that the adsorption was endothermic and physical in nature. (c) 2008
Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000264918900036,
  author = {Demirbas, E and Dizge, N and Sulak, M T and Kobya, M},
  title = {Adsorption kinetics and equilibrium of copper from aqueous solutions using hazelnut shell activated carbon},
  journal = {CHEMICAL ENGINEERING JOURNAL},
  year = {2009},
  volume = {148},
  number = {2-3},
  pages = {480--487},
  doi = {10.1016/j.cej.2008.09.027}
}
Kara S, Keskinler B and Erhan E (2009), "A novel microbial BOD biosensor developed by the immobilization of P. Syringae in micro-cellular polymers", JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. Vol. 84(4), pp. 511-518.
BibTeX:
@article{ISI:000264946500006,
  author = {Kara, Serdar and Keskinler, Buelent and Erhan, Elif},
  title = {A novel microbial BOD biosensor developed by the immobilization of P. Syringae in micro-cellular polymers},
  journal = {JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY},
  year = {2009},
  volume = {84},
  number = {4},
  pages = {511--518},
  doi = {10.1002/jctb.2071}
}
Sunlu FS, Demir I, Engin GO, Buyukisik B, Sunlu U, Koray T and Kukrer S (2009), "Nanoplankton population dynamics and dissolved oxygen change across the bay of Izmir by neural networks", JOURNAL OF ENVIRONMENTAL MONITORING. Vol. 11(6), pp. 1165-1168.
Abstract: The bay of Izmir, which is the biggest harbor on the Aegean Sea, is of
upmost economical importance for Izmir, the third largest city in
Turkey. Most of the studies carried out focused on the effects of
intensive industrial activity and agricultural production on the bay
pollution within the region. These studies, most of the time, are
limited to monitoring the level of pollution. However, it is believed
that these studies should be supported with models and statistical
analysis techniques, as the models, especially the prediction ones,
provide an important approach to assessing risk and assessment. In this
study, neural network analysis was used to construct prediction models
for nanoplankton population change with nutrients and other
environmentally important parameters. The results indicated that, using
data over a 52 week period, it is possible to predict nanoplankton
population dynamics and dissolved oxygen change for the future.
BibTeX:
@article{ISI:000266795900005,
  author = {Sunlu, F S and Demir, I and Engin, G Onkal and Buyukisik, B and Sunlu, U and Koray, T and Kukrer, S},
  title = {Nanoplankton population dynamics and dissolved oxygen change across the bay of Izmir by neural networks},
  journal = {JOURNAL OF ENVIRONMENTAL MONITORING},
  year = {2009},
  volume = {11},
  number = {6},
  pages = {1165--1168},
  doi = {10.1039/b815185g}
}
Dizge N, Demirbas E and Kobya M (2009), "Removal of thiocyanate from aqueous solutions by ion exchange", JOURNAL OF HAZARDOUS MATERIALS. Vol. 166(2-3), pp. 1367-1376.
Abstract: The adsorption kinetics and equilibrium of thiocyanate in aqueous
solutions onto an anion-exchange resin (Purolite A-250) were
investigated in a batch-mode operation to assess the possible use of
this adsorbent. The effect of various parameters such as initial
thiocyanate concentration, contact time, pH, particle size, resin
dosage and temperature were studied. A comparison of four kinetic
models, the pseudo-first-order, second-order, Elovich and diffusion
controlled kinetic models, on the thiocyanate-resin system was used to
determine the rate constants and the adsorption mechanism. The kinetic
results correlated well with pseudo-second-order model. The
experimental parameters had also an effect on the pore and surface
diffusivities. The optimum conditions for removal of thiocyanate were
found to be pH 8,2 g/l of adsorbent dosage, 355-500 mu m of particle
size and equilibrium time of 30 min, respectively. The column capacity
and performance by the bed depth service time model using bed depth and
flow rate as variables were evaluated. The adsorption isotherm data
were fitted well to Langmuir and Freundlich isotherms. The adsorption
capacity was calculated as 191.20 mg/g at 323 K. Thermodynamics
parameters such as free Delta G(0), Delta H-0 and Delta S-0 for the
adsorption were evaluated. The positive value of Delta H-0 indicated
that the process was endothermic in nature. (C) 2008 Elsevier B.V. All
rights reserved.
BibTeX:
@article{ISI:000266947000114,
  author = {Dizge, N and Demirbas, E and Kobya, M},
  title = {Removal of thiocyanate from aqueous solutions by ion exchange},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2009},
  volume = {166},
  number = {2-3},
  pages = {1367--1376},
  doi = {10.1016/j.jhazmat.2008.12.049}
}
Dizge N, Keskinler B and Barlas H (2009), "Sorption of Ni(II) ions from aqueous solution by Lewatit cation-exchange resin", JOURNAL OF HAZARDOUS MATERIALS. Vol. 167(1-3), pp. 915-926.
BibTeX:
@article{ISI:000267267000133,
  author = {Dizge, Nadir and Keskinler, Buelent and Barlas, Hulusi},
  title = {Sorption of Ni(II) ions from aqueous solution by Lewatit cation-exchange resin},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2009},
  volume = {167},
  number = {1-3},
  pages = {915--926},
  doi = {10.1016/j.jhazmat.2009.01.073}
}
Bahsi ZB, Bueyukaksoy A, Olmezcan SM, Simsek F, Aslan MH and Oral AY (2009), "A Novel Label-Free Optical Biosensor Using Synthetic Oligonucleotides from E. coli O157:H7: Elementary Sensitivity Tests", SENSORS. Vol. 9(6), pp. 4890-4900.
BibTeX:
@article{ISI:000267339700049,
  author = {Bahsi, Zehra Banu and Bueyukaksoy, Aliguel and Olmezcan, Sinan Mert and Simsek, Fethi and Aslan, Muhammed Hasan and Oral, Ahmet Yavuz},
  title = {A Novel Label-Free Optical Biosensor Using Synthetic Oligonucleotides from E. coli O157:H7: Elementary Sensitivity Tests},
  journal = {SENSORS},
  year = {2009},
  volume = {9},
  number = {6},
  pages = {4890--4900},
  doi = {10.3390/s90604890}
}
Yatmaz HC and Uzman Y (2009), "Degradation of Pesticide Monochrotophos from Aqueous Solutions by Electrochemical Methods", INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE., may, 2009. Vol. 4(5), pp. 614-626.
BibTeX:
@article{ISI:000267341100001,
  author = {Yatmaz, H Cengiz and Uzman, Yasin},
  title = {Degradation of Pesticide Monochrotophos from Aqueous Solutions by Electrochemical Methods},
  journal = {INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE},
  year = {2009},
  volume = {4},
  number = {5},
  pages = {614--626}
}
Ozkan M, Erhan E, Terzi O, Tan I and Ozoner SK (2009), "Thermostable amperometric lactate biosensor with Clostridium thermocellum L-LDH for the measurement of blood lactate", TALANTA. Vol. 79(5), pp. 1412-1417.
BibTeX:
@article{ISI:000269288400034,
  author = {Ozkan, Melek and Erhan, Elif and Terzi, Ozlem and Tan, Ibrahim and Ozoner, Seyda Korkut},
  title = {Thermostable amperometric lactate biosensor with Clostridium thermocellum L-LDH for the measurement of blood lactate},
  journal = {TALANTA},
  year = {2009},
  volume = {79},
  number = {5},
  pages = {1412--1417},
  doi = {10.1016/j.talanta.2009.06.012}
}
Arslan-Alaton I, Kobya M, Akyol A and Bayramoglu M (2009), "Electrocoagulation of azo dye production wastewater with iron electrodes: process evaluation by multi-response central composite design", COLORATION TECHNOLOGY. Vol. 125(4), pp. 234-241.
Abstract: Central composite design was used to optimise electrocoagulation of CI
Acid Blue 193 production wastewater. By applying a response surface
quadratic model, the main process manipulators (effluent chemical
oxygen demand, initial pH, electrical current density and treatment
time) were optimised to achieve maximum colour, chemical oxygen demand
and total organic compound removals. Analysis of variance indicated
that the established polynomial regression models were significant and
fitted the experimental data satisfactorily.
BibTeX:
@article{ISI:000269363100006,
  author = {Arslan-Alaton, Idil and Kobya, Mehmet and Akyol, Abdurrahman and Bayramoglu, Mahmut},
  title = {Electrocoagulation of azo dye production wastewater with iron electrodes: process evaluation by multi-response central composite design},
  journal = {COLORATION TECHNOLOGY},
  year = {2009},
  volume = {125},
  number = {4},
  pages = {234--241},
  doi = {10.1111/j.1478-4408.2009.00202.x}
}
Ozoner SK, Can MY, Keskinler B and Erhan E (2009), "A Novel Poly(Glutaraldehyde-co-Pyrrole)/Horseradish Peroxidase Composite Film Electrode", ANALYTICAL LETTERS. Vol. 42(18), pp. 3058-3072.
BibTeX:
@article{ISI:000271812000010,
  author = {Ozoner, Seyda Korkut and Can, Mevra Yalvac and Keskinler, Bulent and Erhan, Elif},
  title = {A Novel Poly(Glutaraldehyde-co-Pyrrole)/Horseradish Peroxidase Composite Film Electrode},
  journal = {ANALYTICAL LETTERS},
  year = {2009},
  volume = {42},
  number = {18},
  pages = {3058--3072},
  doi = {10.1080/00032710903276489}
}
Kobya M, Demirbas E and Akyol A (2009), "Electrochemical treatment and operating cost analysis of textile wastewater using sacrificial iron electrodes", WATER SCIENCE AND TECHNOLOGY. Vol. 60(9), pp. 2261-2270.
Abstract: Electrocoagulation (EC) method with iron electrode was used to treat
the textile wastewater in a batch reactor. Iron electrode material was
used as a sacrificial electrode in monopolar parallel mode in this
study. The removal efficiencies of the wastewater by EC were affected
by initial pH of the solution, current density, conductivity and time
of electrolysis. Under the optimal experimental conditions (initial pH
6.9, current density of 10 mA/cm(2), conductivity of 3,990 mu S/cm, and
electrolysis time of 10 min), the treatment of textile wastewater by
the EC process led to a removal capacity of 78% of chemical oxygen
demand (COD) and 92% of turbidity. The energy and electrode
consumptions at the optimum conditions were calculated to be 0.7 kWh/kg
COD (1.7 kWh/m(3)) and 0.2 kgFe/kg COD (0.5 kgFe/m(3)), respectively.
Moreover, the operating cost was calculated as 0.2 (sic)/kg removed COD
or 0.5 (sic)/m(3) treated wastewater. Zeta potential measurement was
used to determine the charge of particle formed during the EC which
revealed that Fe(OH) 3 might be responsible for the EC process.
BibTeX:
@article{ISI:000271936500007,
  author = {Kobya, M and Demirbas, E and Akyol, A},
  title = {Electrochemical treatment and operating cost analysis of textile wastewater using sacrificial iron electrodes},
  journal = {WATER SCIENCE AND TECHNOLOGY},
  year = {2009},
  volume = {60},
  number = {9},
  pages = {2261--2270},
  doi = {10.2166/wst.2009.672}
}
Tekbas M, Bektas N and Yatmaz HC (2009), "Adsorption studies of aqueous basic dye solutions using sepiolite", DESALINATION. Vol. 249(1), pp. 205-211.
BibTeX:
@article{ISI:000271955400033,
  author = {Tekbas, Mesut and Bektas, Nihal and Yatmaz, H Cengiz},
  title = {Adsorption studies of aqueous basic dye solutions using sepiolite},
  journal = {DESALINATION},
  year = {2009},
  volume = {249},
  number = {1},
  pages = {205--211},
  doi = {10.1016/j.desal.2008.10.028}
}
Danis U and Keskinler B (2009), "Chromate removal from wastewater using micellar enhanced crossflow filtration: Effect of transmembrane pressure and crossflow velocity", DESALINATION. Vol. 249(3), pp. 1356-1364.
BibTeX:
@article{ISI:000272438500063,
  author = {Danis, Ue and Keskinler, B},
  title = {Chromate removal from wastewater using micellar enhanced crossflow filtration: Effect of transmembrane pressure and crossflow velocity},
  journal = {DESALINATION},
  year = {2009},
  volume = {249},
  number = {3},
  pages = {1356--1364},
  doi = {10.1016/j.desal.2009.06.023}
}
Ergenekon P, Ozturk NK and Tavsan S (2009), "ENVIRONMENTAL AIR LEVELS OF VOLATILE ORGANIC COMPOUNDS BY THERMAL DESORPTION-GAS CHROMATOGRAPHY IN AN INDUSTRIAL REGION", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 18(11), pp. 1999-2003.
Abstract: Benzene, Toluene, Ethylbenzene and Xylene (BTEX) are the group of VOCs
widely used as representative of VOC pollution. In this study BTEX
measurements were made in Dilovasi at two selected points. One was at
the center of the town (DLV) and the other was GYTE campus which can be
considered as a background area. Dilovasi is a coastal town in the
Marmara region known for its deteriorated environmental conditions.
Cancer is the primary death cause for Dilovasi residents with a ratio
three times higher than Turkey's general average. Active and passive
tube sampling methods were used to collect the air samples and BTEX
levels were determined by thermal desorption GC-FID analytical system.
In the preparatory step long term passive sampling results for 2, 3,
and 4 weeks sampling times were compared and 2-week sampling was chosen
due to observed lowest back diffusion.
BTEX concentration ratios were calculated as (5.4; 9.1;1.03.1) at DLV
and (6.1;7.5;1.0;2.2) at GYTE using passive sampling results. Active
samples taken in the morning at DLV showed significant correlation
among BTEX compounds suggesting the effect of traffic related VOC
pollution at the site while GYTE is not under direct effect of VOC
sources but having polluted aged air masses. BTEX levels from active
tube sampling exhibit up to 5 times of the concentration values
obtained from passive sampling
BibTeX:
@article{ISI:000272582500002,
  author = {Ergenekon, Pinar and Ozturk, Naciye Kilic and Tavsan, Selim},
  title = {ENVIRONMENTAL AIR LEVELS OF VOLATILE ORGANIC COMPOUNDS BY THERMAL DESORPTION-GAS CHROMATOGRAPHY IN AN INDUSTRIAL REGION},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2009},
  volume = {18},
  number = {11},
  pages = {1999--2003}
}
Eyvaz M, Kirlaroglu M, Aktas TS and Yuksel E (2009), "The effects of alternating current electrocoagulation on dye removal from aqueous solutions", CHEMICAL ENGINEERING JOURNAL. Vol. 153(1-3), pp. 16-22.
BibTeX:
@article{ISI:000274348600003,
  author = {Eyvaz, Murat and Kirlaroglu, Mustafa and Aktas, Tugrul Selami and Yuksel, Ebubekir},
  title = {The effects of alternating current electrocoagulation on dye removal from aqueous solutions},
  journal = {CHEMICAL ENGINEERING JOURNAL},
  year = {2009},
  volume = {153},
  number = {1-3},
  pages = {16--22},
  doi = {10.1016/j.cej.2009.05.028}
}
Okay S, Tefon BE, Oezkan M and Oezcengiz G (2008), "Expression of chitinase A (chiA) gene from a local isolate of Serratia marcescens in Coleoptera-specific Bacillus thuringiensis", JOURNAL OF APPLIED MICROBIOLOGY. Vol. 104(1), pp. 161-170.
Abstract: Aims: The present study focused on cloning and expression of chiA gene
from a highly chitinolytic local isolate of Serratia marcescens in an
anti-Coleopteran Bacillus thuringiensis and comparison of the
characteristics of the native and recombinant ChiAs.
Methods and Results: chiA gene from Ser. marcescens was cloned,
sequenced and compared with the previously cloned chiA genes. chiA gene
was PCR cloned and expressed in anti-Coleopteran B. thuringiensis
strain 3023 as verified by Western blot analysis. Specific ChiA
activity of the recombinant B. thuringiensis (strain 3023-SCHI) reached
its highest level at 21st hour of growth (16.93 U mg(-1)), which was
5.2- and 1.3-fold higher than that of its parental strain and Ser.
marcescens, respectively. Temperature and pH effects on native and
recombinant ChiAs were next determined. The recombinant plasmid was
quite stable over 240 generations.
Conclusions: Serratia marcescens ChiA was heterologously expressed in
an anti-Coleopteran B. thuringiensis at levels even higher than that
produced by the source organism.
Significance and Impact of the Study: Bacillus thuringiensis 3023-SCHI
co-expressing anti-Coleopteran Cry3Aa protein and Ser. marcescens
chitinase offers a viable alternative to the use of chitinolytic
microbes/enzymes in combination with entamopathogenic bacteria for an
increased potency because of synergistic interaction between them.
BibTeX:
@article{ISI:000251670600016,
  author = {Okay, S and Tefon, B E and Oezkan, M and Oezcengiz, G},
  title = {Expression of chitinase A (chiA) gene from a local isolate of Serratia marcescens in Coleoptera-specific Bacillus thuringiensis},
  journal = {JOURNAL OF APPLIED MICROBIOLOGY},
  year = {2008},
  volume = {104},
  number = {1},
  pages = {161--170},
  doi = {10.1111/j.1365-2672.2007.03570.x}
}
Dizge N, Aydiner C, Demirbas E, Kobya M and Kara S (2008), "Adsorption of reactive dyes from aqueous solutions by fly ash: Kinetic and equilibrium studies", JOURNAL OF HAZARDOUS MATERIALS. Vol. 150(3), pp. 737-746.
BibTeX:
@article{ISI:000253219500033,
  author = {Dizge, N and Aydiner, C and Demirbas, E and Kobya, M and Kara, S},
  title = {Adsorption of reactive dyes from aqueous solutions by fly ash: Kinetic and equilibrium studies},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2008},
  volume = {150},
  number = {3},
  pages = {737--746},
  doi = {10.1016/j.jhazmat.2007.05.027}
}
Koparal AS, Yildiz YS, Keskinler B and Demircioglu N (2008), "Effect of initial pH on the removal of humic substances from wastewater by electrocoagulation", SEPARATION AND PURIFICATION TECHNOLOGY. Vol. 59(2), pp. 175-182.
BibTeX:
@article{ISI:000253327400008,
  author = {Koparal, Ali Savas and Yildiz, Yalcin Sevki and Keskinler, Buelent and Demircioglu, Nuhi},
  title = {Effect of initial pH on the removal of humic substances from wastewater by electrocoagulation},
  journal = {SEPARATION AND PURIFICATION TECHNOLOGY},
  year = {2008},
  volume = {59},
  number = {2},
  pages = {175--182},
  doi = {10.1016/j.seppur.2007.06.004}
}
Oguz E and Keskinler B (2008), "Removal of colour and COD from synthetic textile wastewaters using O-3, PAC, H2O2 and HCO3-", JOURNAL OF HAZARDOUS MATERIALS., mar, 2008. Vol. 151(2-3), pp. 753-760.
BibTeX:
@article{ISI:000253829200058,
  author = {Oguz, Ensar and Keskinler, Buelent},
  title = {Removal of colour and COD from synthetic textile wastewaters using O-3, PAC, H2O2 and HCO3-},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2008},
  volume = {151},
  number = {2-3},
  pages = {753--760},
  doi = {10.1016/j.jhazmat.2007.06.045}
}
Yildiz YS, Koparal AS and Keskinler B (2008), "Effect of initial pH and supporting electrolyte on the treatment of water containing high concentration of humic substances by electrocoagulation", CHEMICAL ENGINEERING JOURNAL., may, 2008. Vol. 138(1-3), pp. 63-72.
Abstract: In this study, the effects of supporting electrolyte type and
concentration were investigated on the batch removal of water with high
concentration of natural organic matter (NOM) by the electrocoagulation
method using plate electrodes. It was observed that the addition of
supporting electrolyte has a twofold effect which can be summarized as
follows: firstly increasing the ionic strength of the water causing
compression of the double-layer and secondly raising the electrical
conductivity of the water causing more current passing through the
circuit under the same applied potential. It was observed that the
concentration of 5 mM supporting electrolyte was optimum up to 100 mg/L
of NOM, while concentration of 10 mM is more favorable for higher
concentrations than 100 mg/L of NOM. In order to determine the most
favorable supporting electrolyte type, NaCl, Na2SO4 and NaNO3 were used
as supporting electrolyte in the test runs. Under the conditions of
initial pH of the solution equal to 5.0 and initial concentration of
100 mg/L NOM, charge loadings were within the range of 2.0934-3.7437
F/m(3) for Na2SO4 and NaCl, respectively. Additionally at the same
initial conditions for a treatment period of 9 min specific energy
consumptions and removal efficiencies were ranged between the 4.747 and
9.695 kWh/m(3), and between 96.84% and 99.64% for Na2SO4 and NaCl,
respectively. Availability of the chloride (Cl-) ions in the water can
cause formation of disinfection by-products (DBPs) which are suspected
carcinogenic compounds. It can be said that the most favorable
supporting electrolyte type is Na2SO4 for this treatment technique. (C)
2007 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000255100300008,
  author = {Yildiz, Y S and Koparal, A S and Keskinler, B},
  title = {Effect of initial pH and supporting electrolyte on the treatment of water containing high concentration of humic substances by electrocoagulation},
  journal = {CHEMICAL ENGINEERING JOURNAL},
  year = {2008},
  volume = {138},
  number = {1-3},
  pages = {63--72},
  doi = {10.1016/j.cej.2007.05.029}
}
Ince M, Yildiz F, Engin GO, Engin SN and Keskinler B (2008), "Respirometric kinetic parameter calculations of a batch jet loop bioreactor treating leachate and oxygen uptake rate estimation by DTM", JOURNAL OF HAZARDOUS MATERIALS., may, 2008. Vol. 153(3), pp. 991-998.
Abstract: A novel circulating jet loop bioreactor adapted for organic matter
oxidation has been designed and constructed. In this study, the input
was leachate samples collected from Kemerburgaz Odayeri waste landfill
site located on the European side of Istanbul. Controlling the jet loop
bioreactor to realize high rates of purification depends on maintaining
the appropriate loadings and operating conditions. This requires
collecting various system data to estimate the dynamics of the system
satisfactorily with the aim of keeping certain parameters within the
specified range. The differential transform method (DTM) based solution
of the state equations reveals the current state of the process so that
any deviation in the system parameters can be immediately detected and
regulated accordingly.
The respirometric method for kinetic parameter calculations for
biodegradation has been used for some time. In many studies, the
respirometer was designed separately, usually in bench-scale. However,
when a separate respirometer is used, the scale effect and parameters
that affect the hydrodynamic structure of the system should be taken
into consideration. In this study, therefore, the jet loop reactor
itself was used as a respirometer. Thus, the kinetic parameters found
reflecting the characteristics of microorganisms used for
biodegradation would be more realistic. If the main reactor, here the
jet loop reactor, would be used as the respirometer, the kinetic
parameter changes can easily be monitored in the long run. Using the
bioreactor as a respirometer, the most important kinetic parameters,
K-s, k(d) and mu(max) were found to be 11,000 mg L-1, 0.019 day(-1),
and 0.21 day(-1), respectively. The stoichiometric coefficient, Y, was
found to be 0.28 gr gr(-1) for the present system. (C) 2007 Elsevier
B.V. All rights reserved.
BibTeX:
@article{ISI:000255544300012,
  author = {Ince, M and Yildiz, F and Engin, G Onkal and Engin, S N and Keskinler, B},
  title = {Respirometric kinetic parameter calculations of a batch jet loop bioreactor treating leachate and oxygen uptake rate estimation by DTM},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2008},
  volume = {153},
  number = {3},
  pages = {991--998},
  doi = {10.1016/j.jhazmat.2007.09.069}
}
Kobya M, Ciftci C, Bayramoglu M and Sensoy MT (2008), "Study on the treatment of waste metal cutting fluids using electrocoagulation", SEPARATION AND PURIFICATION TECHNOLOGY., may, 2008. Vol. 60(3), pp. 285-291.
Abstract: Electrocoagulation (EC) technique is applied for the treatment of waste
metal cutting fluids (WMCFs) characterized by high COD and TOC
concentration, discharged from metal manufacturing facilities including
automotive engine, transmission, and stamping plants. The effects of
initial pH, current density and operating time on the performance of EC
are investigated by using sacrificial A] and Fe electrodes. Upon
treatment by EC, the COD of WMCF is reduced by 93% and the TOC is
reduced by 78% for At electrode at pH 5.0, current density of 60
A/m(2) and operating time of 25 min. For Fe electrode, the reduction in
COD is 92% and reduction in TOC is 82% at pH 7.0, current density of
60 A/m(2) and operating time of 25 min. Under optimal operating
conditions, the operating costs are calculated as 0.497 /m(3) (0.023
/kg removed COD or 0.144 /kg removed TOC) for Fe electrode, and
0.768 /m(3) (0.036 /kg removed COD or 0.228/kg removed TOC) for
Al electrode. Fe electrode is found to be more efficient than At
electrode in terms of parameters such as COD and TOC removal
efficiencies and operating costs. (c) 2007 Elsevier B.V. All rights
reserved.
BibTeX:
@article{ISI:000255820300010,
  author = {Kobya, M and Ciftci, C and Bayramoglu, M and Sensoy, M T},
  title = {Study on the treatment of waste metal cutting fluids using electrocoagulation},
  journal = {SEPARATION AND PURIFICATION TECHNOLOGY},
  year = {2008},
  volume = {60},
  number = {3},
  pages = {285--291},
  doi = {10.1016/j.seppur.2007.09.003}
}
Demirbas E, Kobya M and Konukman AES (2008), "Error analysis of equilibrium studies for the almond shell activated carbon adsorption of Cr(VI) from aqueous solutions", JOURNAL OF HAZARDOUS MATERIALS. Vol. 154(1-3), pp. 787-794.
BibTeX:
@article{ISI:000256111200101,
  author = {Demirbas, E and Kobya, M and Konukman, A E S},
  title = {Error analysis of equilibrium studies for the almond shell activated carbon adsorption of Cr(VI) from aqueous solutions},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2008},
  volume = {154},
  number = {1-3},
  pages = {787--794},
  doi = {10.1016/j.jhazmat.2007.10.094}
}
Kobya M and Delipinar S (2008), "Treatment of the baker's yeast wastewater by electrocoagulation", JOURNAL OF HAZARDOUS MATERIALS. Vol. 154(1-3), pp. 1133-1140.
BibTeX:
@article{ISI:000256111200143,
  author = {Kobya, M and Delipinar, S},
  title = {Treatment of the baker's yeast wastewater by electrocoagulation},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2008},
  volume = {154},
  number = {1-3},
  pages = {1133--1140},
  doi = {10.1016/j.jhazmat.2007.11.019}
}
Veli S, Oeztuerk T and Dimoglo A (2008), "Treatment of municipal solid wastes leachate by means of chemical- and electro-coagulation", SEPARATION AND PURIFICATION TECHNOLOGY. Vol. 61(1), pp. 82-88.
BibTeX:
@article{ISI:000256116500011,
  author = {Veli, Sevil and Oeztuerk, Tuba and Dimoglo, Anatoly},
  title = {Treatment of municipal solid wastes leachate by means of chemical- and electro-coagulation},
  journal = {SEPARATION AND PURIFICATION TECHNOLOGY},
  year = {2008},
  volume = {61},
  number = {1},
  pages = {82--88},
  doi = {10.1016/j.seppur.2007.09.026}
}
Dizge N, Gunaydin O, Yilmaz F and Tanriseven A (2008), "Immobilization of invertase onto poly (3-methylthienyl methacrylate)/poly (3-thiopheneacetic acid) matrix", BIOCHEMICAL ENGINEERING JOURNAL., may, 2008. Vol. 40(1), pp. 64-71.
BibTeX:
@article{ISI:000256607500008,
  author = {Dizge, Nadir and Gunaydin, Okan and Yilmaz, Faruk and Tanriseven, Aziz},
  title = {Immobilization of invertase onto poly (3-methylthienyl methacrylate)/poly (3-thiopheneacetic acid) matrix},
  journal = {BIOCHEMICAL ENGINEERING JOURNAL},
  year = {2008},
  volume = {40},
  number = {1},
  pages = {64--71},
  doi = {10.1016/j.bej.2007.11.017}
}
Demirbas E, Kobya M and Sulak MT (2008), "Adsorption kinetics of a basic dye from aqueous solutions onto apricot stone activated carbon", BIORESOURCE TECHNOLOGY. Vol. 99(13), pp. 5368-5373.
Abstract: The preparation of activated carbon from apricot stone with H2SO4
activation and its ability to remove a basic dye, astrazon yellow 7GL,
from aqueous solutions were reported in this study-The adsorbent was
characterized by FTIR, BET and SEM, respectively. The effects of
various experimental parameters, such as initial dye concentration, pH,
adsorbent dosage and temperature were investigated in a batch-ad
sorption technique. The optimum conditions for removal of the basic dye
were found to be pH 10, 6 g/l of adsorbent dosage and equilibrium time
of 35 min, respectively. A comparison of three kinetic models, the
pseudo first-order, second-order and diffusion controlled kinetic
models, on the basic dye-adsorbent system showed that the removal rate
was heavily dependent on diffusion controlled kinetic models. The
adsorption isotherm data were fitted well to Langmuir and Freundlich
isotherms. The adsorption capacity was calculated as 221.23 mg/g at 50
degrees C. Thermodynamics parameters were also evaluated. The values of
enthalpy and entropy were 49.87 kJ/mol and 31.93 J/mol K, respectively,
indicating that this process was spontaneous and endothermic. The
experimental studies were indicated that ASC had the potential to act
as an alternative adsorbent to remove the basic dye from aqueous
solutions. (C) 2007 Elsevier Ltd. All rights reserved.
BibTeX:
@article{ISI:000256654600011,
  author = {Demirbas, E and Kobya, M and Sulak, M T},
  title = {Adsorption kinetics of a basic dye from aqueous solutions onto apricot stone activated carbon},
  journal = {BIORESOURCE TECHNOLOGY},
  year = {2008},
  volume = {99},
  number = {13},
  pages = {5368--5373},
  doi = {10.1016/j.biortech.2007.11.019}
}
Yassitepe E, Yatmaz HC, Ozturk C, Ozturk K and Duran C (2008), "Photocatalytic efficiency of ZnO plates in degradation of azo dye solutions", JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY. Vol. 198(1), pp. 1-6.
BibTeX:
@article{ISI:000257036700001,
  author = {Yassitepe, E and Yatmaz, H C and Ozturk, C and Ozturk, K and Duran, C},
  title = {Photocatalytic efficiency of ZnO plates in degradation of azo dye solutions},
  journal = {JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY},
  year = {2008},
  volume = {198},
  number = {1},
  pages = {1--6},
  doi = {10.1016/j.jphotochem.2008.02.007}
}
Oguz E, Keskinler B and Tortum A (2008), "Determination of the apparent ozonation rate constants of 1 : 2 metal complex dyestuffs and modeling with a neural network", CHEMICAL ENGINEERING JOURNAL. Vol. 141(1-3), pp. 119-129.
Abstract: In this study, the apparent ozonation rate constants of 1:2 metal
complex dyestuffs under different empirical conditions such as dye
concentrations (400-1000 ppm), ozone-air flow rates (5-15 l min(-1)),
the percentages Of 03 in the ozone-air flow rate (0.7-1.4), pH (3-12),
temperatures (18-70 degrees C), powder activated carbon (PAC) (0.5-1.5
g in solution of 250 ml), HCO3- (0-26 mM) and H2O2 concentrations (0-21
mM) were determined. The ozonation of 1:2 metal complex dyestuffs was
found to be fit pseudo-first-order reaction, and the apparent rate
constants did not change with the increase of dyestuffs concentrations.
For 1:2 metal complex dyestuffs, the apparent rate constants of
dyestuffs degradation by ozonation increased with the augmentation of
initial pH, H2O2, the percentage of O-3 in the ozone-air flow rate and
PAC dosage in the solution, but decreased with the increase of HCO3-
concentration and temperature of the solution. The apparent rate
constant of dyestuffs degradation by ozonation increased with the
augmentation of ozone-air flow rate from 5 to 10 l min(-1), but it did
not change in the range of 10-15 l min(-1). At a high pH, the ozonation
of 1:2 metal complex dyestuffs contributed to the increase the apparent
rate constant due to the occurrence of hydroxyl free radicals. Using
Arrhenius equation, the activation energy (E-a) of the reaction was
found as 3 kJ mol(-1). The reaction of the ozonation of the dyestuffs
under the different temperatures (291, 3 13 and 343 K) was defined as
diffusion controlled according to E.,,. The model based on artificial
neural network (ANN) could predict the concentrations of the dyestuffs
removal from the aqueous solution during ozonation under the different
conditions. A relationship between the predicted results of the
designed ANN model and the experimental data was also conducted. The
ANN model yielded 11 determination coefficient of R-2 = 0.978, a
standard deviation ratio of 0.146, a mean absolute error of 19.503 and
a root mean square error of 56.600. (C) 2007 Elsevier B.V. All rights
reserved.
BibTeX:
@article{ISI:000257572900014,
  author = {Oguz, Ensar and Keskinler, Buelent and Tortum, Ahmet},
  title = {Determination of the apparent ozonation rate constants of 1 : 2 metal complex dyestuffs and modeling with a neural network},
  journal = {CHEMICAL ENGINEERING JOURNAL},
  year = {2008},
  volume = {141},
  number = {1-3},
  pages = {119--129},
  doi = {10.1016/j.cej.2007.11.002}
}
Oguz E, Tortum A and Keskinler B (2008), "Determination of the apparent rate constants of the degradation of humic substances by ozonation and modeling of the removal of humic substances from the aqueous solutions with neural network", JOURNAL OF HAZARDOUS MATERIALS. Vol. 157(2-3), pp. 455-463.
BibTeX:
@article{ISI:000258425900031,
  author = {Oguz, Ensar and Tortum, Ahmet and Keskinler, Buelent},
  title = {Determination of the apparent rate constants of the degradation of humic substances by ozonation and modeling of the removal of humic substances from the aqueous solutions with neural network},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2008},
  volume = {157},
  number = {2-3},
  pages = {455--463},
  doi = {10.1016/j.jhazmat.2008.01.018}
}
Dizge N, Keskinler B and Tanriseven A (2008), "Covalent attachment of microbial lipase onto microporous styrene-divinylbenzene copolymer by means of polyglutaraldehyde", COLLOIDS AND SURFACES B-BIOINTERFACES. Vol. 66(1), pp. 34-38.
Abstract: A novel method for immobilization of Thermomyces lanuginosus lipase
onto polyglutaraldehyde-activated polystyrene-divinylbenzene)
(STY-DVB), which is a hydrophobic microporous support has been
successfully developed. The copolymer was prepared by the
polymerization of the continuous phase of a high internal phase
emulsion (polyHIPE). The concentrated emulsion consists of a mixture of
styrene and divinylbenzene containing a suitable surfactant and an
initiator as the continuous phase and water as the dispersed phase.
Lipase from T lanuginosus was immobilized covalently with 85% yield on
the internal surface of the hydrophobic microporous
polystyrene-divinylbenzene) copolymer and used as a biocatalyst for the
transesterification reaction. The immobilized enzyme has been fully
active 30 days in storage and retained the activity during the 15
repeated batch reactions. The properties of free and immobilized lipase
were studied. The effects of protein concentration, pH, temperature,
and time on the immobilization, activity, and stability of the
immobilized lipase were also studied. The newly synthesized microporous
polystyrene-divinylbenzene) copolymer constitutes excellent support for
lipase. It given rise to high immobilization yield. retains enzymatic
activity for 30 days, stable in structure and allows for the
immobilization of large amount of protein (11.4 mg/g support). Since
immobilization is simple yet effective, the newly immobilized lipase
could be used in several application including oil hydrolysis,
production of modified oils, biodiesel synthesis, and removal of fatty
acids from oils. (c) 2008 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000258983900005,
  author = {Dizge, Nadir and Keskinler, Buelent and Tanriseven, Aziz},
  title = {Covalent attachment of microbial lipase onto microporous styrene-divinylbenzene copolymer by means of polyglutaraldehyde},
  journal = {COLLOIDS AND SURFACES B-BIOINTERFACES},
  year = {2008},
  volume = {66},
  number = {1},
  pages = {34--38},
  doi = {10.1016/j.colsurfb.2008.05.003}
}
Oencel MS (2008), "Adsorption of copper(II) from aqueous solution by Beidellite", ENVIRONMENTAL GEOLOGY. Vol. 55(8), pp. 1767-1775.
BibTeX:
@article{ISI:000259730000014,
  author = {Oencel, M S},
  title = {Adsorption of copper(II) from aqueous solution by Beidellite},
  journal = {ENVIRONMENTAL GEOLOGY},
  year = {2008},
  volume = {55},
  number = {8},
  pages = {1767--1775},
  doi = {10.1007/s00254-007-1127-6}
}
Korkut S, Keskinler B and Erhan E (2008), "An amperometric biosensor based on multiwalled carbon nanotube-poly(pyrrole)-horseradish peroxidase nanobiocomposite film for determination of phenol derivatives", TALANTA. Vol. 76(5), pp. 1147-1152.
BibTeX:
@article{ISI:000259750800027,
  author = {Korkut, Seyda and Keskinler, Bulent and Erhan, Elif},
  title = {An amperometric biosensor based on multiwalled carbon nanotube-poly(pyrrole)-horseradish peroxidase nanobiocomposite film for determination of phenol derivatives},
  journal = {TALANTA},
  year = {2008},
  volume = {76},
  number = {5},
  pages = {1147--1152},
  doi = {10.1016/j.talanta.2008.05.016}
}
Tekbas M, Yatmaz HC and Bektas N (2008), "Heterogeneous photo-Fenton oxidation of reactive azo dye solutions using iron exchanged zeolite as a catalyst", MICROPOROUS AND MESOPOROUS MATERIALS. Vol. 115(3), pp. 594-602.
Abstract: The heterogeneous photo-Fenton-type oxidation of reactive azo dye
solutions has been investigated in a quartz batch reactor using
artificial UVA as a light source. Fe-exchanged zeolite has been used as
a heterogeneous catalyst in the process. The effect of various process
variables on decolorization performance of the process was evaluated by
examining temperature, pH, H2O2 dosage, catalyst loading, initial dye
concentration and light intensity. The optimal operational parameters
were found as follows: 35 degrees C, pH as solution pH 5.2, 15 mmol
H2O2 dosage, 1 g/L catalyst loading. Stability and reuse of the
catalyst were also tested. Mineralization and comparison with
homogenous photo-Fenton process were evaluated by analyzing color
removal and total organic carbon (TOC) values. (c) 2008 Elsevier Inc.
All rights reserved.
BibTeX:
@article{ISI:000259845000045,
  author = {Tekbas, Mesut and Yatmaz, H Cengiz and Bektas, Nihal},
  title = {Heterogeneous photo-Fenton oxidation of reactive azo dye solutions using iron exchanged zeolite as a catalyst},
  journal = {MICROPOROUS AND MESOPOROUS MATERIALS},
  year = {2008},
  volume = {115},
  number = {3},
  pages = {594--602},
  doi = {10.1016/j.micromeso.2008.03.001}
}
Sayiner G, Kandemirli F and Dimoglo A (2008), "Evaluation of boron removal by electrocoagulation using iron and aluminum electrodes", DESALINATION. Vol. 230(1-3), pp. 205-212.
Abstract: Boron compounds are used in the variety of products manufacturing and
are introduced to the environment in the form of waste. Here the
feasibility of the boron removal from wastewater by electrocoagulation
(EC) is studied. Aluminum and iron were simultaneously used in the
reactor as materials for cathode and anode. The results show that the EC
process for boron removal strongly depends on the current density,
initial concentrations, and time. The process is examined under varying
indices in order to determine optimal operating conditions. It is
important to note the EC application needs no chemical reagents and
makes the boron-containing wastewater treatment easy for regulation and
automation.
BibTeX:
@article{ISI:000260286900019,
  author = {Sayiner, G and Kandemirli, F and Dimoglo, A},
  title = {Evaluation of boron removal by electrocoagulation using iron and aluminum electrodes},
  journal = {DESALINATION},
  year = {2008},
  volume = {230},
  number = {1-3},
  pages = {205--212},
  doi = {10.1016/j.desal.2007.10.020}
}
Akyol A and Bayramoglu M (2008), "The degradation of an azo dye in a batch slurry photocatalytic reactor", CHEMICAL ENGINEERING AND PROCESSING. Vol. 47(12), pp. 2150-2156.
Abstract: The photocatalytic degradation of a commercial azo-reactive textile
dye, Remazol Red F-3B, has been investigated in a batch slurry reactor
using semiconductor catalysts like, ZnO and TiO2, and two UV sources
emitting mainly at 254 and 365 rim. Non-irradiated catalysts and
non-catalyzed UV irradiation have negligible effect on the dye
degradation. Initial pH. dye concentration, light power and catalyst
loading as well as the catalyst type and UV wavelength are considered
as process variables. The results showed that decolorization and TOC
removal efficiencies of ZnO are higher under 365 nm UV. On the other
hand, when two photocatalysts are compared, the decolorization
performance of ZnO is higher than TiO2 under 365 nm UV. while TiO2
performs better under 254 nm UV. Furthermore, from the TOC removal
point, TiO2 performs better than ZnO irrespective of the UV wavelength.
TiO2 irradiated under 254 nm UV degrades successfully both benzene and
naphthalene derivatives. (C) 2007 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000261134000013,
  author = {Akyol, Abdurrahman and Bayramoglu, Mahmut},
  title = {The degradation of an azo dye in a batch slurry photocatalytic reactor},
  journal = {CHEMICAL ENGINEERING AND PROCESSING},
  year = {2008},
  volume = {47},
  number = {12},
  pages = {2150--2156},
  doi = {10.1016/j.cep.2007.11.002}
}
Uyar G, Oeren M, Yildirim Y and Oencel S (2008), "Biomonitoring of Metal Deposition in the Vicnity of Eregli Steel Plant in Turkey", ENVIRONMENTAL FORENSICS. Vol. 9(4), pp. 350-363.
Abstract: This article describes the first attempt to study the concentration of
seven element (Fe, Pb, Ni, Cr, Cu, Co, and As) contaminations in the
vicinity of the Eregli Iron and Steel Plant (ERDEMIR) by analysis of two
pleurocarpic moss species (Hypnum cupressiforme and Scleropodium purum).
Samples of H. cupressiforme were collected from May 2003 to October
2004. Unwashed, dried samples were digested with HNO3/HClO4, and the
concentrations of heavy metals were determined by graphite-furnace
atomic absorption spectrometry (GFAAS). In the region, general orders of
heavy metal content in samples of mosses were determined as follows: Fe
Pb Cr Ni Cu Co As. Comparisons were made between the two moss species
for those elements presents at different concentrations and regression
analysis were made to see interspecies relationship. H. cupressiforme
and S. purum are significantly correlated for only Fe (P 0.01) having
Pearson's correlation coefficient as 0.93, indicating interspecies
calibration for Fe. The ratios (Hc/Sp) were relatively better correlated
with 1/Sp for As than for other metals, suggesting a saturation effect
in H. cupressiforme for As. The deposition of metals due to the
operation of the steel plant has been established and could be further
monitored. Such information could be useful for forensic studies aiming
to apportion between different possible sources of those metals.
BibTeX:
@article{ISI:000261675300008,
  author = {Uyar, G and Oeren, M and Yildirim, Y and Oencel, S},
  title = {Biomonitoring of Metal Deposition in the Vicnity of Eregli Steel Plant in Turkey},
  journal = {ENVIRONMENTAL FORENSICS},
  year = {2008},
  volume = {9},
  number = {4},
  pages = {350--363},
  doi = {10.1080/15275920802122783}
}
Dizge N and Keskinler B (2008), "Enzymatic production of biodiesel from canola oil using immobilized lipase", BIOMASS & BIOENERGY. Vol. 32(12), pp. 1274-1278.
Abstract: In the present work, a novel method for immobilization of lipase within
hydrophilic polyurethane foams using polyglutaraldehyde was developed
for the immobilization of Thermamyces lanuginosus lipase to produce
biodiesel with canola oil and methanol. The enzyme optimum conditions
were not affected by immobilization and the optimum pH for free and
immobilized enzyme were 6, resulting in 80% immobilization yield.
Using the immobilized lipase T lanuginosus, the effects of enzyme
loading, oil/alcohol molar ratio, water concentration, and temperature
in the transesterification reaction were investigated. The optimal
conditions for processing 20 g of refined canola oil were: 430 mu g
lipase, 1:6 oil/methanol molar ratio, 0.1g water and 40 degrees C for
the reactions with methanol. Maximum methyl esters yield was 90% of
which enzymatic activity remained after 10 batches, when tert-butanol
was adopted to remove by-product glycerol during repeated use of the
lipase. The immobilized lipase proved to be stable and lost little
activity when was subjected to repeated uses. (C) 2008 Elsevier Ltd.
All rights reserved.
BibTeX:
@article{ISI:000261903700023,
  author = {Dizge, Nadir and Keskinler, Buelent},
  title = {Enzymatic production of biodiesel from canola oil using immobilized lipase},
  journal = {BIOMASS & BIOENERGY},
  year = {2008},
  volume = {32},
  number = {12},
  pages = {1274--1278},
  doi = {10.1016/j.biombioe.2008.03.005}
}
Yildiz YS, Koparal AS, Irdemez A and Keskinler B (2007), "Electrocoagulation of synthetically prepared waters containing high concentration of NOM using iron cast electrodes", JOURNAL OF HAZARDOUS MATERIALS. Vol. 139(2), pp. 373-380.
Abstract: The aim of this investigation is to evaluate the treatibility of
synthetically prepared water with high concentration of humic
substances by electrocoagulation in batch mode using iron cast
electrodes. Effects of applied potential, initial humic substance
concentration and supporting electrolyte type on humic substance
removal efficiency were investigated. NaNO3, Na2SO4 and NaCl were used
as supporting electrolyte. Among these supporting electrolytes, Na2SO4
and NaCl have provided high removal efficiencies, whereas in the
experiments using NaNO3 as supporting electrolyte have been observed no
flock formation. The highest removal rate is obtainable with NaCl as
supporting electrolyte. Removal efficiencies for initial humic
substance concentration of 500 mg L-1 with NaCl and Na2SO4 equal to
97.95% for 35 min and 92.69% for 70 min, respectively. This behavior
of the system has been derived from oxidation products, available in
the bulk solution, of chloride ions. When NaCl is used as supporting
electrolyte, there is an advantage of providing the disinfection of
water, but humic substances and chloride ions are available in the bulk
solution with risk of formation undesirable organo-chlorine compounds,
so the Na2SO4 is the most favorable supporting electrolyte. (c) 2006
Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000243822200026,
  author = {Yildiz, Yaldiz Sevki and Koparal, Ali Savas and Irdemez, Ahset and Keskinler, Bulent},
  title = {Electrocoagulation of synthetically prepared waters containing high concentration of NOM using iron cast electrodes},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2007},
  volume = {139},
  number = {2},
  pages = {373--380},
  doi = {10.1016/j.jhazmat.2006.06.044}
}
Oguz E and Keskinler B (2007), "Comparison among O-3, PAC adsorption, O-3/HCO3-, O-3/H2O2 and O-3/PAC processes for the removal of Bomaplex Red CR-L dye from aqueous solution", DYES AND PIGMENTS. Vol. 74(2), pp. 329-334.
Abstract: Various processes including O-3, powder activated carbon (PAC)
adsorption, O-3/HCO3-, O-3/H2O2 and O-3/PAC were used in order to remove
dye and chemical oxygen demand (COD) from synthetic wastewater
containing Bomaplex Red CR-L dye in a semi-batch reactor. These
processes rapidly removed the dye and COD from dye solution. The dye
removal efficiency was over 99% for a reaction period of 30 min for all
the processes. It was observed that PAC adsorption and O-3/PAC processes
were considerably more effective than ozonation process for the removal
of COD from dye Solution. The COD removal efficiency of O-3/PAC was
higher than PAC adsorption process. O-3/PAC process was considerably
effective to remove COD from dye solutions despite using less amount of
PAC (approximately four times less than one used for PAC adsorption) for
the same amount of COD removal with a higher efficiency. O-3/HCO3-
process positively affected the COD removal efficiency, whereas O-3/H2O2
process negatively affected the COD removal efficiency as compared to
the ozonation process alone. In addition, the yield and mechanisms of
dye removal were also explained on the basis of the results of Fourier
transform infrared spectroscopy (FTIR). It was concluded that the
O-3/PAC process is a highly efficient process to remove dye and COD from
synthetic textile wastewaters as compared to the other processes. (c)
2006 Elsevier Ltd. All rights reserved.
BibTeX:
@article{ISI:000244588000013,
  author = {Oguz, Ensar and Keskinler, Bulent},
  title = {Comparison among O-3, PAC adsorption, O-3/HCO3-, O-3/H2O2 and O-3/PAC processes for the removal of Bomaplex Red CR-L dye from aqueous solution},
  journal = {DYES AND PIGMENTS},
  year = {2007},
  volume = {74},
  number = {2},
  pages = {329--334},
  doi = {10.1016/j.dyepig.2006.02.011}
}
Turker M and Celen I (2007), "Removal of ammonia as struvite from anaerobic digester effluents and recycling of magnesium and phosphate", BIORESOURCE TECHNOLOGY., may, 2007. Vol. 98(8), pp. 1529-1534.
BibTeX:
@article{ISI:000244775100003,
  author = {Turker, Mustafa and Celen, Ipek},
  title = {Removal of ammonia as struvite from anaerobic digester effluents and recycling of magnesium and phosphate},
  journal = {BIORESOURCE TECHNOLOGY},
  year = {2007},
  volume = {98},
  number = {8},
  pages = {1529--1534},
  doi = {10.1016/j.biortech.2006.06.026}
}
Uyar G, Oeren M and Ince M (2007), "Atmospheric heavy metal deposition in Duzce province by using mosses as biomonitors", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 16(2), pp. 145-153.
BibTeX:
@article{ISI:000244937300007,
  author = {Uyar, Gueray and Oeren, Muhammet and Ince, Mahir},
  title = {Atmospheric heavy metal deposition in Duzce province by using mosses as biomonitors},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2007},
  volume = {16},
  number = {2},
  pages = {145--153}
}
Uyar G, Oeren M, Ince M and Yildirim Y (2007), "Mosses as indicators of atmospheric heavy metal deposition around a coal-fired power plant in Turkey", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 16(2), pp. 182-192.
BibTeX:
@article{ISI:000244937300012,
  author = {Uyar, Gueray and Oeren, Muhammet and Ince, Mahir and Yildirim, Yilmaz},
  title = {Mosses as indicators of atmospheric heavy metal deposition around a coal-fired power plant in Turkey},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2007},
  volume = {16},
  number = {2},
  pages = {182--192}
}
Yavuz B, Turker M and Engin GO (2007), "Autotrophic removal of sulphide from industrial wastewaters using oxygen and nitrate as electron acceptors", ENVIRONMENTAL ENGINEERING SCIENCE., may, 2007. Vol. 24(4), pp. 457-470.
Abstract: The effect of environmental conditions on sulphide removal was studied
in laboratory-scale batch experiments. Sulphide removal was carried out
by adding two different electron acceptors (oxygen and nitrate) and
stock sulphide solution to activated sludge solutions obtained from a
wastewater treatment plant treating molasses-based industrial
wastewaters. The effects of pH, temperature, and concentration of
activated sludge on specific sulphide oxidation rates were studied. It
was found that 80% sulphide removal was achieved when oxygen was used
as an electron acceptor with activated sludge, whereas almost 100%
sulphide removal was obtained when nitrate was used. Sulphide removal
without activated sludge was also determined. The specific sulphide
oxidation rate increased approximately 88% with increasing activated
sludge concentration with nitrate as an electron acceptor and sulphide
was completely removed within 6 min. When oxygen was used as an
electron acceptor, specific removal increased up to 92%; however, it
was observed that an amount of sulphide remained in the medium, even
though the activated sludge concentration was increased. Additionally,
the stoichiometry of sulphide oxidation both with nitrate and oxygen
were calculated assuming different end products based on thermodynamic
approach and compared with experimental yield values.
BibTeX:
@article{ISI:000245818000005,
  author = {Yavuz, Berna and Turker, Mustafa and Engin, Guleda Onkal},
  title = {Autotrophic removal of sulphide from industrial wastewaters using oxygen and nitrate as electron acceptors},
  journal = {ENVIRONMENTAL ENGINEERING SCIENCE},
  year = {2007},
  volume = {24},
  number = {4},
  pages = {457--470},
  doi = {10.1089/ees.2006.0068}
}
Bayramoglu M, Eyvaz M and Kobya M (2007), "Treatment of the textile wastewater by electrocoagulation Economical evaluation", CHEMICAL ENGINEERING JOURNAL. Vol. 128(2-3), pp. 155-161.
BibTeX:
@article{ISI:000246060400009,
  author = {Bayramoglu, Mahmut and Eyvaz, Murat and Kobya, Mehmet},
  title = {Treatment of the textile wastewater by electrocoagulation Economical evaluation},
  journal = {CHEMICAL ENGINEERING JOURNAL},
  year = {2007},
  volume = {128},
  number = {2-3},
  pages = {155--161},
  doi = {10.1016/j.cej.2006.10.008}
}
Sulak MT, Demirbas E and Kobya M (2007), "Removal of Astrazon Yellow 7GL from aqueous solutions by adsorption onto wheat bran", BIORESOURCE TECHNOLOGY. Vol. 98(13), pp. 2590-2598.
Abstract: Adsorption kinetic and equilibrium of a basic dye (Astrazon Yellow 7GL)
from aqueous solutions at various initial dye concentration (50-300
mg/l), pH (4-10), adsorbent dosage (2-8 g/l), particle size (354-846 mu
m) and temperature (30-50 C) on wheat bran were studied in a batch mode
operation. The result showed that the amount adsorbed of the dye
increased with increasing initial dye concentration and contact time,
whereas particle size and pH had no significant affect on the amount of
dye adsorbed by the adsorbent. A comparison of kinetic models on the
overall adsorption rate showed that dye/adsorbent system was best
described by the pseudo second-order rate model. The removal rate was
also dependent on both external mass transfer and intra-particle
diffusion. The low value of the intraparticle diffusivity, 10(-11)
cm(2)/S, indicated the significant influence of intraparticle diffusion
on the kinetic control. The adsorption capacity (Q(0)) calculated from
the Langmuir isotherm was 69.06 mg/g for at pH 5.6, 303 K for the
particle size of 354 mu m. The experimental data yielded excellent fits
with Langmuir and Tempkin isotherm equations. Different thermodynamic
parameters showed that the reaction was spontaneous and endothermic in
nature. (c) 2006 Elsevier Ltd. All rights reserved.
BibTeX:
@article{ISI:000247382700019,
  author = {Sulak, M T and Demirbas, E and Kobya, M},
  title = {Removal of Astrazon Yellow 7GL from aqueous solutions by adsorption onto wheat bran},
  journal = {BIORESOURCE TECHNOLOGY},
  year = {2007},
  volume = {98},
  number = {13},
  pages = {2590--2598},
  doi = {10.1016/j.biortech.2006.09.010}
}
Bilgili MS, Demir A, Ince M and Oezkaya B (2007), "Metal concentrations of simulated aerobic and anaerobic pilot scale landfill reactors", JOURNAL OF HAZARDOUS MATERIALS. Vol. 145(1-2), pp. 186-194.
BibTeX:
@article{ISI:000247702200024,
  author = {Bilgili, M Sinan and Demir, Ahmet and Ince, Mahir and Oezkaya, Bestamin},
  title = {Metal concentrations of simulated aerobic and anaerobic pilot scale landfill reactors},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2007},
  volume = {145},
  number = {1-2},
  pages = {186--194},
  doi = {10.1016/j.jhazmat.2006.11.014}
}
Kara S, Aydiner C, Demirbas E, Kobya M and Dizge N (2007), "Modeling the effects of adsorbent dose and particle size on the adsorption of reactive textile dyes by fly ash", DESALINATION. Vol. 212(1-3), pp. 282-293.
Abstract: The adsorption of three reactive dyes, Remazol Red, Rernazol Blue and
Rifacion Yellow, from aqueous solutions using fly ash as an adsorbent
was studied in an agitated batch system to investigate the influence of
two parameters viz., adsorbent dosage and particle size on the removal
efficiency of the reactive dyes. Firstly, the adsorbent was
characterized with using several methods such as SEM, XRD and FTIR. The
FTIR suggested that the dye on fly ash is probably indicating fly
ash/dye cornplexation. XRD pattern of fly ash consisted of mainly
quartz, mullite with some magnetite and calcite. Surface morphology of
fly ash and dye loaded fly ash were obtained with SEM. Secondly, the
percentage of dye removal at equilibrium, p, was determined with
respect to these two parameters with a constant initial dye
concentration of 100 mg/L, agitation speed of 250 rpm, pH 6 and
temperature of 22 degrees C for a period of 48 h. The experimental data
were treated with two simple empirical models used for predicting the
percentage of the dyes adsorbed on the fly ash. Both models showed good
correlation coefficients but the best model which determined the p
values can be selected on the basis of the standard deviation of the
calculated and experimental values.
BibTeX:
@article{ISI:000247835500026,
  author = {Kara, S and Aydiner, C and Demirbas, E and Kobya, M and Dizge, N},
  title = {Modeling the effects of adsorbent dose and particle size on the adsorption of reactive textile dyes by fly ash},
  journal = {DESALINATION},
  year = {2007},
  volume = {212},
  number = {1-3},
  pages = {282--293},
  doi = {10.1016/j.desal.2006.09.022}
}
Farizoglu B, Keskinler B, Yildiz E and Nuhoglu A (2007), "Simultaneous removal of C, N, P from cheese whey by jet loop membrane bioreactor (JLMBR)", JOURNAL OF HAZARDOUS MATERIALS. Vol. 146(1-2), pp. 399-407.
Abstract: The membrane bioreactor (MBR) used in this study consisted of a jet
loop bioreactor (aerobic high rate system) and a membrane separation
unit (microfiltration). Jet loop membrane bioreactor (JLMBR) system is
a high performance treatment system. High organic loading rates can be
achieved with a very small footprint. The JLMBR is a compact biological
treatment system which requires much smaller tank volumes than
conventional activated sludge system. Solid-liquid separation is
performed with a membrane. The JLMBR system, of 35 L capacity, was
operated continuously for 3 months with a sludge age of 1. 1-2.8 days
and chemical oxygen demand (COD) loads of 3.5-33.5 kg COD m(-3)
day(-1). The mean concentration values of COD, total nitrogen (TN) and
PO43- in cheese whey (CW) were found as 78,680 mg L-1, 1125 mg L-1 and
378 mg L-1, respectively. Ninety-seven percent COD removal rate was
obtained at the sludge age (Theta(c)) of 1.6 days and volumetric loads
of 22.2 kg COD m(-3) day(-1). TN removal was obtained as 99% at the
loading rates of 17-436 g TN m(-3) day(-1). PO43- removals were between
65 and 88% for the loading of 30-134 g PO43- m(-3) day(-1). The system
could simultaneously remove the COD, TN and PO43- at high efficiencies.
The sludge flocks were highly motile, dispersed and had poor settling
properties. (C) 2006 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000248159700052,
  author = {Farizoglu, Burhanettin and Keskinler, Bulent and Yildiz, Ergun and Nuhoglu, Alper},
  title = {Simultaneous removal of C, N, P from cheese whey by jet loop membrane bioreactor (JLMBR)},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2007},
  volume = {146},
  number = {1-2},
  pages = {399--407},
  doi = {10.1016/j.jhazmat.2006.12.051}
}
Farizoglu B and Keskinler B (2007), "Influence of draft tube cross-sectional geometry on K(L)a and epsilon in jet loop bioreactors (JLB)", CHEMICAL ENGINEERING JOURNAL. Vol. 133(1-3), pp. 293-299.
BibTeX:
@article{ISI:000248174600031,
  author = {Farizoglu, Burhanettin and Keskinler, Bulent},
  title = {Influence of draft tube cross-sectional geometry on K(L)a and epsilon in jet loop bioreactors (JLB)},
  journal = {CHEMICAL ENGINEERING JOURNAL},
  year = {2007},
  volume = {133},
  number = {1-3},
  pages = {293--299},
  doi = {10.1016/j.cej.2007.02.022}
}
Karagozoglu B, Tasdemir M, Demirbas E and Kobya M (2007), "The adsorption of basic dye (Astrazon Blue FGRL) from aqueous solutions onto sepiolite, fly ash and apricot shell activated carbon: Kinetic and equilibrium studies", JOURNAL OF HAZARDOUS MATERIALS. Vol. 147(1-2), pp. 297-306.
BibTeX:
@article{ISI:000249136200038,
  author = {Karagozoglu, B and Tasdemir, M and Demirbas, E and Kobya, M},
  title = {The adsorption of basic dye (Astrazon Blue FGRL) from aqueous solutions onto sepiolite, fly ash and apricot shell activated carbon: Kinetic and equilibrium studies},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2007},
  volume = {147},
  number = {1-2},
  pages = {297--306},
  doi = {10.1016/j.jhazmat.2007.01.003}
}
Kobya M, Bayramoglu M and Eyvaz M (2007), "Techno-economical evaluation of electrocoagulation for the textile wastewater using different electrode connections", JOURNAL OF HAZARDOUS MATERIALS. Vol. 148(1-2), pp. 311-318.
Abstract: The bench scale of an electrocoagulation (EC) unit requires a detailed
study discerning the effects of continuous variables such as pH,
current density and operating time. and type variables such as
electrode material and connection mode. This paper presents the results
of the treatment of a textile wastewater by EC process. Two electrode
materials, aluminum and iron, were connected in three modes namely,
monopolar-parallel (MP-P), monopolar-serial (MP-S), and bipolar-serial
(BP-S). COD and turbidity removals were selected as performance
criteria. For a high COD removal, acidic medium is preferable for both
electrode materials. For a high turbidity removal, acidic medium is
preferable for aluminum. and neutral medium for iron. High current
density is favorable for both removals in the case of iron. In the
aluminum case, the current density exhibits a pronounced effect on COD
removal, depending strongly on the connection mode, but it has a
negligible effect on the turbidity removal. MP-P with iron or MP-S with
aluminum electrode are suitable configurations in regard with the
overall process performance. Moreover. process economy is as important
as removal efficiencies during the process evaluation task. Various
direct and indirect cost items including electrical, sacrificial
electrodes, labor, sludge handling, maintenance and depreciation costs
have been considered in the calculation of the total cost. The results
show that MP-P mode is the most cost-effective for both electrode
types. Both electrodes show similar results in reducing COD and
turbidity, but iron is preferred as a low cost material. Finally, a
comparative study showed that EC was faster and more economic; consumed
less material and produced less sludge, and pH of the medium was more
stabilized than chemical coagulation (CC) for similar COD and turbidity
removal levels. For CC, FeCl3 was the preferable salt in view of its
techno-economic performance. On the other hand, iron was the preferred
electrode material in EC with MP-P system in experimental conditions
such as, 30A m(-2) of current density and 15 min of time. the treatment
cost was 0.245 m(-3). Consequently, the operating cost of CC was 3.2
times as high as the operating cost of EC. (C) 2007 Elsevier B.V. All
rights reserved.
BibTeX:
@article{ISI:000249312500041,
  author = {Kobya, Mehmet and Bayramoglu, Mahmut and Eyvaz, Murat},
  title = {Techno-economical evaluation of electrocoagulation for the textile wastewater using different electrode connections},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2007},
  volume = {148},
  number = {1-2},
  pages = {311--318},
  doi = {10.1016/j.jhazmat.2007.02.036}
}
Oezpinar O and Oezkan MB (2007), "Cellulose degradation and glucose accumulation by Clostridium thermocellum ATCC 27405 under different cultural conditions", ANNALS OF MICROBIOLOGY. Vol. 57(3), pp. 395-400.
Abstract: Effect of various cultural parameters on cellulose degradation, glucose
accumulation and ethanol production by Clostridium thermocellum ATCC
27405 were investigated. Optimum pH values for glucose accumulation and
ethanol production were determined as 7 and 10, respectively. Highest
amount of ethanol (0.92 g/l) was obtained from the culture which
contains 10 g urea/l with 34.5% decrease in glucose accumulation.
Addition of 100 mM phosphate to the medium increased ethanol production
while cellulose degradation and sugar accumulation decreased by 34 and
99%, respectively. Among minerals tested, Mg+2 was found to be the
most important element which affects cellulose degradation. When the
medium contained no Mg+2, residual cellulose concentration was 4.3 g
cellulose/l. When the cultural parameters were optimised, glucose
accumulation started at early days of fermentation and glucose
concentration was 60% higher than that of the control at the loth day
of fermentation.
BibTeX:
@article{ISI:000250319900016,
  author = {Oezpinar, Oezlem and Oezkan, Melek B},
  title = {Cellulose degradation and glucose accumulation by Clostridium thermocellum ATCC 27405 under different cultural conditions},
  journal = {ANNALS OF MICROBIOLOGY},
  year = {2007},
  volume = {57},
  number = {3},
  pages = {395--400}
}
Akkoyunlu A, Demir I, Yueksel E and Eyvaz M (2007), "Anaerobic treatment of biscuit wastewater in an uasb-reactor", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 16(9B), pp. 1201-1206.
BibTeX:
@article{ISI:000250560200010,
  author = {Akkoyunlu, Atilla and Demir, Ibrahim and Yueksel, Ebubekir and Eyvaz, Murat},
  title = {Anaerobic treatment of biscuit wastewater in an uasb-reactor},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2007},
  volume = {16},
  number = {9B},
  pages = {1201--1206}
}
Karagoz P, Erhan E, Keskinler B and Ozkan M (2007), "Ethanol productivity of Saccharomyces cerevisiae immobilized on polyhype polymer", FEBS JOURNAL. Vol. 274(1), pp. 225.
BibTeX:
@article{ISI:000253283800720,
  author = {Karagoz, P and Erhan, E and Keskinler, B and Ozkan, M},
  title = {Ethanol productivity of Saccharomyces cerevisiae immobilized on polyhype polymer},
  journal = {FEBS JOURNAL},
  year = {2007},
  volume = {274},
  number = {1},
  pages = {225}
}
Terzi O, Erhan E, Tan I, Korkut S and Ozkan M (2007), "Cloning, purification and immobilization of thermostable L-lactate dehydrogenase enzyme on polygluteraldehyde-pyrol polymer", FEBS JOURNAL. Vol. 274(1), pp. 305.
BibTeX:
@article{ISI:000253283801038,
  author = {Terzi, O and Erhan, E and Tan, I and Korkut, S and Ozkan, M},
  title = {Cloning, purification and immobilization of thermostable L-lactate dehydrogenase enzyme on polygluteraldehyde-pyrol polymer},
  journal = {FEBS JOURNAL},
  year = {2007},
  volume = {274},
  number = {1},
  pages = {305}
}
Can OT, Kobya M, Demirbas E and Bayramoglu M (2006), "Treatment of the textile wastewater by combined electrocoagulation", CHEMOSPHERE. Vol. 62(2), pp. 181-187.
BibTeX:
@article{ISI:000234279500002,
  author = {Can, O T and Kobya, M and Demirbas, E and Bayramoglu, M},
  title = {Treatment of the textile wastewater by combined electrocoagulation},
  journal = {CHEMOSPHERE},
  year = {2006},
  volume = {62},
  number = {2},
  pages = {181--187},
  doi = {10.1016/j.chemosphere.2005.05.022}
}
Gokdogan O, Sulak M and Gulce H (2006), "Investigation of oxygen electroreduction on polyvinylferrocene coated glassy carbon electrodes", CHEMICAL ENGINEERING JOURNAL. Vol. 116(1), pp. 39-45.
Abstract: The electroreduction of O-2 has been investigated at a bare glassy
carbon (GC) electrode and a polyvinylferrocene (PVF) coated glassy
carbon electrode (PVF-GC) in both 0.1 M NaClO4 Solution and phosphate
buffer solutions of various pH values by using cyclic voltammetry and
chronoamperometry. Two well-defined reduction peaks were observed at
about -0.55 and -0.80 V versus SCE at PVF-GC electrode while one
reduction peak was observed at about -0.85 V versus SCE at GC electrode
in 0.1 M NaClO4 solution and phosphate buffer solutions of pH textgreater 6. Two
peaks at PVF-GC electrode indicated a two-step four-electron pathway of
O-2 in these mediums. The first peak was ascribable to the two-electron
reduction of O-2 to H2O2, while the second peak was assigned to the
reduction of H2O2 to H2O. The electrocatalytic effects of PVF matrix
for the reduction O-2 and the reduction of H2O2 were observed. The
effects of the film thickness, O-2 concentration, pH and potential scan
rates were investigated. (c) 2005 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000234675700005,
  author = {Gokdogan, O and Sulak, M and Gulce, H},
  title = {Investigation of oxygen electroreduction on polyvinylferrocene coated glassy carbon electrodes},
  journal = {CHEMICAL ENGINEERING JOURNAL},
  year = {2006},
  volume = {116},
  number = {1},
  pages = {39--45},
  doi = {10.1016/j.cej.2005.10.016}
}
Kazanci N, Toprak O, Leroy SAG, Oncel S, Ileri O, Emre O, Costa P, Erturac K and McGee E (2006), "Boron content of Lake Ulubat sediment: A key to interpret the morphological history of NW Anatolia, Turkey", APPLIED GEOCHEMISTRY. Vol. 21(1), pp. 134-151.
Abstract: Freshwater Lake Ulubat (c. 1.5 m deep and c. 138 km(2)) receives
sediment from a 10.414 km(2) area in the seismically active Susurluk
Drainage Basin (SDB) of NW Turkey. The B and trace element contents of
the lake infill seem to be a link between the fresh landforms of the SDB
and the lacustrine sediment. Deposition in Lake Ulubat has been 1.60 cm
a(-1) for the last 50 a according to radionucleides; however the
sedimentation rate over the last millennium was 0.37 cm a(-1) based on
14 C dating. The B content of the lacustrine infill displays a slight
increase at 0.50 m and a drastic increase at 4 m depth occurring c. 31 a
and c. 1070 a ago, respectively. Probably the topmost change corresponds
to the start of open mining in the SDB and the second one to the natural
trenching of borate ore-deposits. These dates also show indirectly a 1.4
cm a(-1) erosion rate during the last millennium as the borate beds were
trenched up to 15 m. By extrapolation, it is possible to establish that
the formation of some of the present morphological features of the
southern Marmara region, especially river incision, began in the late
Pleistocene, and developed especially over the last 75 ka. (c) 2005
Elsevier Ltd. All rights reserved.
BibTeX:
@article{ISI:000235108700009,
  author = {Kazanci, N and Toprak, O and Leroy, S A G and Oncel, S and Ileri, O and Emre, O and Costa, P and Erturac, K and McGee, E},
  title = {Boron content of Lake Ulubat sediment: A key to interpret the morphological history of NW Anatolia, Turkey},
  journal = {APPLIED GEOCHEMISTRY},
  year = {2006},
  volume = {21},
  number = {1},
  pages = {134--151},
  doi = {10.1016/j.apgeochem.2005.09.003}
}
Sulak MT, Gokdogan O, Gulce A and Gulce H (2006), "Amperometric glucose biosensor based on gold-deposited polyvinylferrocene film on Pt electrode", BIOSENSORS & BIOELECTRONICS., mar, 2006. Vol. 21(9), pp. 1719-1726.
Abstract: The preparations and performances of the novel amperometric biosensors
for glucose based on immobilized glucose oxidase (GOD) on modified Pt
electrodes are described. Two types of modified electrodes for the
enzyme immobilization were used in this study, polyvinyl ferrocene
(PVF) coated Pt electrode and gold deposited PVF coated Pt electrode. A
simple method forthe immobilization of GOD enzyme on the modified
electrodes was described. The enzyme electrodes developed in this study
were called as PVF-GOD enzyme electrode and PVF-Au-GOD enzyme
electrode, respectively. The amperometric responses of the enzyme
electrodes were measured at constant potential, which was due to the
electrooxidation of enzymatically produced H2O2. The electrocatalytic
effects of the polymer. PVF. and the cold particles towards the
electrooxidation of the enzymatically generated H2O2 offers sensitive
and selective monitoring of glucose. The biosensor based on PVF-Au-GOD
electrode has 6.6 times larger maximum current, 3.8 times higher
sensitivity and 1.6 times larger linear working portion than those of
the biosensor based on PVF-GOD electrode. The effects of the applied
potential. the thickness of the polymeric film. the amount of the
immobilized enzyme, pH. the amount of the deposited An, temperature and
substrate concentration on the responses of the biosensors were
investigated. The optimum pH was found to be pH 7.4 at 25 degrees C.
Finally the effects of interferents, stability of the biosensors and
applicability to serum analysis of the biosensor were also
investigated. (c) 2005 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000236317400006,
  author = {Sulak, M T and Gokdogan, O and Gulce, A and Gulce, H},
  title = {Amperometric glucose biosensor based on gold-deposited polyvinylferrocene film on Pt electrode},
  journal = {BIOSENSORS & BIOELECTRONICS},
  year = {2006},
  volume = {21},
  number = {9},
  pages = {1719--1726},
  doi = {10.1016/j.bios.2005.08.008}
}
Basar CA, Aydiner C, Kara S and Keskinler B (2006), "Removal of CrO4 anions from waters using surfactant enhanced hybrid PAC/MF process", SEPARATION AND PURIFICATION TECHNOLOGY., mar, 2006. Vol. 48(3), pp. 270-280.
BibTeX:
@article{ISI:000236526800008,
  author = {Basar, C A and Aydiner, C and Kara, S and Keskinler, B},
  title = {Removal of CrO4 anions from waters using surfactant enhanced hybrid PAC/MF process},
  journal = {SEPARATION AND PURIFICATION TECHNOLOGY},
  year = {2006},
  volume = {48},
  number = {3},
  pages = {270--280},
  doi = {10.1016/j.seppur.2005.07.033}
}
Oguz E, Keskinler B, Celik C and Celik Z (2006), "Determination of the optimum conditions in the removal of Bomaplex Red CR-L dye from the textile wastewater using O-3, H2O2, HCO3- and PAC", JOURNAL OF HAZARDOUS MATERIALS. Vol. 131(1-3), pp. 66-72.
BibTeX:
@article{ISI:000236930100009,
  author = {Oguz, E and Keskinler, B and Celik, C and Celik, Z},
  title = {Determination of the optimum conditions in the removal of Bomaplex Red CR-L dye from the textile wastewater using O-3, H2O2, HCO3- and PAC},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2006},
  volume = {131},
  number = {1-3},
  pages = {66--72},
  doi = {10.1016/j.jhazmat.2005.09.15}
}
Karagunduz A, Kaya Y, Keskinler B and Once S (2006), "Influence of surfactant entrapment to dried alginate beads on sorption and removal of Cu2+ ions", JOURNAL OF HAZARDOUS MATERIALS. Vol. 131(1-3), pp. 79-83.
BibTeX:
@article{ISI:000236930100011,
  author = {Karagunduz, A and Kaya, Y and Keskinler, B and Once, S},
  title = {Influence of surfactant entrapment to dried alginate beads on sorption and removal of Cu2+ ions},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2006},
  volume = {131},
  number = {1-3},
  pages = {79--83},
  doi = {10.1016/j.jhazmat.2005.09.020}
}
Kobya M, Hiz H, Senturk E, Aydiner C and Demirbas E (2006), "Treatment of potato chips manufacturing wastewater by electrocoagulation", DESALINATION. Vol. 190(1-3), pp. 201-211.
BibTeX:
@article{ISI:000237169800019,
  author = {Kobya, M and Hiz, H and Senturk, E and Aydiner, C and Demirbas, E},
  title = {Treatment of potato chips manufacturing wastewater by electrocoagulation},
  journal = {DESALINATION},
  year = {2006},
  volume = {190},
  number = {1-3},
  pages = {201--211},
  doi = {10.1016/j.desal.2005.10.006}
}
Kobya M, Demirbas E, Can OT and Bayramoglu M (2006), "Treatment of levafix orange textile dye solution by electrocoagulation", JOURNAL OF HAZARDOUS MATERIALS., may, 2006. Vol. 132(2-3), pp. 183-188.
BibTeX:
@article{ISI:000237612100008,
  author = {Kobya, M and Demirbas, E and Can, O T and Bayramoglu, M},
  title = {Treatment of levafix orange textile dye solution by electrocoagulation},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2006},
  volume = {132},
  number = {2-3},
  pages = {183--188},
  doi = {10.1016/j.jhazmat.2005.07.084}
}
Aydiner C, Bayramoglu M, Kara S, Keskinler B and Ince O (2006), "Nickel removal from waters using surfactant-enhanced hybrid PAC/MF process. I. The influence of system-component variables", INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH., may, 2006. Vol. 45(11), pp. 3926-3933.
Abstract: This study takes aim at exploring the effectiveness of a
surfactant-added powdered activated carbon/ microfiltration (PAC/MF)
hybrid process in the removal of nickel ions from water and wastewater
as a promising technology. For this aim, the influence of
system-component variables related to membrane material and pore size,
and adsorbent and surfactant types was investigated. Nickel rejection
(R-M), surfactant rejection (R-S), and steady-state flux (J*) were
taken into account for more elaborately assessing the technical
performance of the process. It was determined that the use of a
surfactant in this process is justified only above the critical
micellar concentration (CMC). Despite the increasing of nickel
rejection with the addition of surfactant into the hybrid membrane
process, a considerable decrease in steady-state flux is a major
drawback of process. The flux decline observed was strongly dependent
on surfactant type. This was interpreted as being due to a secondary
membrane layer formed by surfactant micelles on the surface and within
the membrane pores. The flux decline could also be related to PAC layer
formation. Membrane, adsorbent, and surfactant types seem to have the
highest relative influence on R-M, R-S, and J*, respectively. As a
conclusion, surfactant type and membrane pore size were established as
having the biggest and the smallest total influence on process
performance, respectively.
BibTeX:
@article{ISI:000237625400019,
  author = {Aydiner, C and Bayramoglu, M and Kara, S and Keskinler, B and Ince, O},
  title = {Nickel removal from waters using surfactant-enhanced hybrid PAC/MF process. I. The influence of system-component variables},
  journal = {INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH},
  year = {2006},
  volume = {45},
  number = {11},
  pages = {3926--3933},
  doi = {10.1021/ie051237c}
}
Kobya M, Senturk E and Bayramoglu M (2006), "Treatment of poultry slaughterhouse wastewaters by electrocoagulation", JOURNAL OF HAZARDOUS MATERIALS., may, 2006. Vol. 133(1-3), pp. 172-176.
Abstract: Treatment of poultry slaughterhouse wastewater (PSW) by
electrocoagulation (EC) has been investigated batchwise in this paper.
Effects of the process variables such as medium pH, electrode material,
current density, and operating time are investigated on chemical oxygen
demand (COD) and oil-grease removal efficiencies, electrical energy
consumption, and sacrificial electrode consumption. The highest COD
removal efficiency is reached with aluminum as 93%, and maximum
oil-grease removal is obtained with iron electrodes as 98%. Combined
use of both electrode materials in the EC unit may yield high process
performances with respect to both COD and oil-grease removals. Further
work needs to be carried out at pilot scale to assess the technical end
economic feasibility of the process. (c) 2005 Elsevier B.V All rights
reserved.
BibTeX:
@article{ISI:000237825000024,
  author = {Kobya, M and Senturk, E and Bayramoglu, M},
  title = {Treatment of poultry slaughterhouse wastewaters by electrocoagulation},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2006},
  volume = {133},
  number = {1-3},
  pages = {172--176},
  doi = {10.1016/j.jhazmat.2005.10.007}
}
Dogan O and Kobya M (2006), "Elemental analysis of trace elements in fly ash sample of Yatagan thermal power plants using EDXRF", JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER. Vol. 101(1), pp. 146-150.
Abstract: Fly ash samples collected by means of an electrostatic precipitator
from the lignite-fired Yatagan Power Plants of the located in Turkey
was analysed using X-ray fluorescence technique. Five trace elements,
namely Nd, Ba, Sr, Mo and As were quantified using XRF. These
concentration values can be helpful in developing a environmental
pollution abatement approach for various applications of fly ash such
as cement manufacture, wastewater treatment, lightweight contraction
aggregate, ceramic production, and secondary source in recovery of
valuable elements. Present results compared with results of the
Kemerkoy thermal power plants [Sahin Y, Karabulut A, Budak G. A
practical method for the analysis of overlepped peaks in energy
dispersive X-ray spectra. Appl Spectrose Rev 1996;31:333-45]. (C) 2005
Elsevier Ltd. All rights reserved.
BibTeX:
@article{ISI:000238203000013,
  author = {Dogan, O and Kobya, M},
  title = {Elemental analysis of trace elements in fly ash sample of Yatagan thermal power plants using EDXRF},
  journal = {JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER},
  year = {2006},
  volume = {101},
  number = {1},
  pages = {146--150},
  doi = {10.1016/j.jqsrt.2005.11.072}
}
Engin GO and Demir I (2006), "Cost analysis of alternative methods for wastewater handling in small communities", JOURNAL OF ENVIRONMENTAL MANAGEMENT. Vol. 79(4), pp. 357-363.
BibTeX:
@article{ISI:000238316500004,
  author = {Engin, G O and Demir, I},
  title = {Cost analysis of alternative methods for wastewater handling in small communities},
  journal = {JOURNAL OF ENVIRONMENTAL MANAGEMENT},
  year = {2006},
  volume = {79},
  number = {4},
  pages = {357--363},
  doi = {10.1016/j.jenvman.2005.07.011}
}
Farizoglu B and Keskinler B (2006), "Sludge characteristics and effect of crossflow membrane filtration on membrane fouling in a jet loop membrane bioreactor (JLMBR)", JOURNAL OF MEMBRANE SCIENCE. Vol. 279(1-2), pp. 578-587.
Abstract: An aerobic jet loop membrane bioreactor (JLMBR) activated sludge
process of 35 L working volume was used to investigate its
applicability in industrial wastewaters, specifically cheese whey
wastewater. A loading rate of 22.2 kg COD/(m(3) day) and 1.6 days of
sludge age was achieved with 97% COD removal efficiency. During the
study, the activated sludge was found non-settable and slimy
characteristic and non-flocculating motile bacteria structure.
Therefore, it was been conducted that the membrane separation was
indispensable to obtain high performance from jet loop bioreactor
(JLB). From the investigation of crossflow microfiltration
characteristic of the system, it was found that the fluxes decreased
and MFI increased with increasing MLSS concentration. The increasing
crossflow velocity greatly reduced the cake formation on the membrane
surface and increased the steady state permeate fluxes, decreasing
specific cake resistance (alpha) values. The cake layer was in a highly
compressible form. The compressibility coefficient was calculated as
0.98. In addition to this, the pseudo gel concentration (C-G) on the
membrane surface was calculated to be 73,130 mg/L. For the
investigation of the membrane filtration mechanism, it was found that
the fouling mechanism showed high compatibility with complete pore
blocking model and particularly cake filtration model (R-2 = 0.99). (c)
2006 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000238505900063,
  author = {Farizoglu, Burhanettin and Keskinler, Bulent},
  title = {Sludge characteristics and effect of crossflow membrane filtration on membrane fouling in a jet loop membrane bioreactor (JLMBR)},
  journal = {JOURNAL OF MEMBRANE SCIENCE},
  year = {2006},
  volume = {279},
  number = {1-2},
  pages = {578--587},
  doi = {10.1016/j.memsci.2005.12.050}
}
Kobya M, Demirbas E, Yesilot S and Baskaya R (2006), "Adsorption kinetics for the removal of nitrite ions from aqueous solutions by an ion-exchange resin", ADSORPTION SCIENCE & TECHNOLOGY. Vol. 24(2), pp. 131-141.
BibTeX:
@article{ISI:000240376900003,
  author = {Kobya, Mehmet and Demirbas, Erhan and Yesilot, Serkan and Baskaya, Ruhtan},
  title = {Adsorption kinetics for the removal of nitrite ions from aqueous solutions by an ion-exchange resin},
  journal = {ADSORPTION SCIENCE & TECHNOLOGY},
  year = {2006},
  volume = {24},
  number = {2},
  pages = {131--141}
}
Kaya Y, Aydiner C, Barlas H and Keskinler B (2006), "Nanofiltration of single and mixture solutions containing anionics and nonionic surfactants below their critical micelle concentrations (CMCs)", JOURNAL OF MEMBRANE SCIENCE. Vol. 282(1-2), pp. 401-412.
Abstract: Nanofiltration (NF) of linear alkyl benzene sulfonate (LABS), sodium
dodecylether sulfate (SLES) as anionic surfactants and of nonylphenol
ethoxylate (NPE) as nonionic surfactant for selected concentrations
below CMC (critical micelle concentration) was carried out using
various membranes as NF PES10, N 30F and XN 45. Membrane fouling was
observed in the order of XN 45 textgreater NF PES10 textgreater N 30F for LABS, SLES and
mixture solutions, while the order was as NF PES 10 textgreater N 30F textgreater XN 45 for
NPE solution. The most fouled membrane, XN 45, exhibited the least
fouling on the surface in opposition to N 30F. In single solutions, the
highest rejection of LABS and SLES was obtained around 97-98% by NF
PES 10 and N 30F, whereas when XN 45 was used, the rejection rate was
around 93%. In mixture solution, the rejection rates were observed to
be around 97 and 98% by NF PES 10 and N 30F, respectively, which were
quite different from XN 45 rejection rates. The enhancement of
rejections compared to the adsorption of single surfactants, except for
NPE-XN 45 couple, could have been taken place by synergism between
nonionic and anionics as a function of both stronger interactions
between surfactants and surface and, more effective physical separation
forces based on micellation. In NPE-XN 45 couple, NPE was rejected
predominantly under the effect of binding LABS, which had the highest
feed concentration in mixture, on the membrane surface. Consequently,
it was determined that, XN 45 for nonionic (NPE) and NF PES10 for
anionics (LABS and SLES) and mixture solution (LABS + SLES + NPE)
performed the best performance in NF of single and mixture surfactant
solutions. (c) 2006 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000240579700045,
  author = {Kaya, Yasemin and Aydiner, Coskun and Barlas, Hulusi and Keskinler, Bulent},
  title = {Nanofiltration of single and mixture solutions containing anionics and nonionic surfactants below their critical micelle concentrations (CMCs)},
  journal = {JOURNAL OF MEMBRANE SCIENCE},
  year = {2006},
  volume = {282},
  number = {1-2},
  pages = {401--412},
  doi = {10.1016/j.memsci.2006.05.047}
}
Bayramoglua M, Kobya M, Eyvaz M and Senturk E (2006), "Technical and economic analysis of electrocoagulation for the treatment of poultry slaughterhouse wastewater", SEPARATION AND PURIFICATION TECHNOLOGY. Vol. 51(3), pp. 404-408.
BibTeX:
@article{ISI:000241652500023,
  author = {Bayramoglua, Mahmut and Kobya, Mehmet and Eyvaz, Murat and Senturk, Elif},
  title = {Technical and economic analysis of electrocoagulation for the treatment of poultry slaughterhouse wastewater},
  journal = {SEPARATION AND PURIFICATION TECHNOLOGY},
  year = {2006},
  volume = {51},
  number = {3},
  pages = {404--408},
  doi = {10.1016/j.seppur.2006.03.003}
}
Karagunduz A and Unal D (2006), "New method for evaluation of heavy metal binding to alginate beads using pH and conductivity data", ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY., may, 2006. Vol. 12(3), pp. 175-184.
BibTeX:
@article{ISI:000242496000002,
  author = {Karagunduz, Ahmet and Unal, Dilsad},
  title = {New method for evaluation of heavy metal binding to alginate beads using pH and conductivity data},
  journal = {ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY},
  year = {2006},
  volume = {12},
  number = {3},
  pages = {175--184},
  doi = {10.1007/s10450-006-0144-1}
}
Oncel MS, Ince M and Bayramoglu M (2005), "Leaching of silver from solid waste using ultrasound assisted thiourea method", ULTRASONICS SONOCHEMISTRY. Vol. 12(3), pp. 237-242.
BibTeX:
@article{ISI:000224891000015,
  author = {Oncel, M S and Ince, M and Bayramoglu, M},
  title = {Leaching of silver from solid waste using ultrasound assisted thiourea method},
  journal = {ULTRASONICS SONOCHEMISTRY},
  year = {2005},
  volume = {12},
  number = {3},
  pages = {237--242},
  doi = {10.1016/j.ultsonch.2003.10.007}
}
Oguz E, Keskinler B and Celik Z (2005), "Ozonation of aqueous Bomaplex Red CR-L dye in a semi-batch reactor", DYES AND PIGMENTS. Vol. 64(2), pp. 101-108.
Abstract: The ozonation of synthetic wastewater containing Bomaplex Red CR-L dye
has been realized in a semi-batch reactor. In this study, the dye and
COD removal from synthetic textile wastewater has been studied by
ozonation as functions of initial dye concentration (400, 600, 800 and
1000 mg L-1), temperature (18, 40 and 70 degreesC, ozone-air flow rate
(5, 10 and 15 L min(-1)), pH (3, 6, 9.3 and 12) and ozone generation
percentage (0.7, 1.1 and 1.4 O-3%). The efficiency of dye removal has
increased with increasing pH, ozone generation rate, and decreased with
increasing temperature, but not changed with increasing ozone-air flow
rate and initial dye concentration. The efficiency of COD removal from
synthetic wastewater has increased with increasing pH, ozone generation
percentage, but scarcely changed with increasing initial dye
concentration and ozone-air flow rate, but the efficiency of COD
removal decreased with increasing temperature. In this study, dye
removal from synthetic wastewater in excess of 99% was obtained at an
oxidation time of 15 min. The efficiencies of COD removal were between
56 and 35% at an oxidation time of 30 min. At the end of the study, it
was concluded that ozonization is an efficient process for dye removal
from synthetic wastewater of Bomaplex Red CR-L, but alone ozonization
was not an efficient method to remove all the COD from the textile
wastewater. (C) 2004 Elsevier Ltd. All rights reserved.
BibTeX:
@article{ISI:000225331300002,
  author = {Oguz, E and Keskinler, B and Celik, Z},
  title = {Ozonation of aqueous Bomaplex Red CR-L dye in a semi-batch reactor},
  journal = {DYES AND PIGMENTS},
  year = {2005},
  volume = {64},
  number = {2},
  pages = {101--108},
  doi = {10.1016/j.dyepig.2004.04.009}
}
Sinirkaya M, Kocakerim MM, Boncukcuoglu R, Kucuk O and Oncel S (2005), "Recovery of boron from tincal wastes", INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. Vol. 44(3), pp. 427-433.
BibTeX:
@article{ISI:000226634200001,
  author = {Sinirkaya, M and Kocakerim, M M and Boncukcuoglu, R and Kucuk, O and Oncel, S},
  title = {Recovery of boron from tincal wastes},
  journal = {INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH},
  year = {2005},
  volume = {44},
  number = {3},
  pages = {427--433},
  doi = {10.1021/ie049705q}
}
Yildiz E, Keskinler B, Pekdemir T, Akay G and Nuhoglu A (2005), "High strength wastewater treatment in a jet loop membrane bioreactor: kinetics and performance evaluation", CHEMICAL ENGINEERING SCIENCE. Vol. 60(4), pp. 1103-1116.
BibTeX:
@article{ISI:000226769600018,
  author = {Yildiz, E and Keskinler, B and Pekdemir, T and Akay, G and Nuhoglu, A},
  title = {High strength wastewater treatment in a jet loop membrane bioreactor: kinetics and performance evaluation},
  journal = {CHEMICAL ENGINEERING SCIENCE},
  year = {2005},
  volume = {60},
  number = {4},
  pages = {1103--1116},
  doi = {10.1016/j.ces.2004.09.071}
}
Aydiner C, Demir I and Yildiz E (2005), "Modeling of flux decline in crossflow microfiltration using neural networks: the case of phosphate removal", JOURNAL OF MEMBRANE SCIENCE. Vol. 248(1-2), pp. 53-62.
BibTeX:
@article{ISI:000226883300006,
  author = {Aydiner, C and Demir, I and Yildiz, E},
  title = {Modeling of flux decline in crossflow microfiltration using neural networks: the case of phosphate removal},
  journal = {JOURNAL OF MEMBRANE SCIENCE},
  year = {2005},
  volume = {248},
  number = {1-2},
  pages = {53--62},
  doi = {10.1016/j.memsci.2004.07.036}
}
Onkal-Engin G, Demir I and Engin SN (2005), "Determination of the relationship between sewage odour and BOD by neural networks", ENVIRONMENTAL MODELLING & SOFTWARE. Vol. 20(7), pp. 843-850.
Abstract: Sewage treatment works are one of the major sources that cause
atmospheric odour pollution. Due to the increase in environmental
concerns, there is a growing number of complaints on odour nuisance. In
order to determine the boundaries of legal standards. reliable and
efficient odour measurement methods need to be defined. An electronic
nose was used for the purpose of characterising sewage odours. Samples
collected at different locations of a wastewater treatment plant were
classified using an Artificial Neural Network (ANN) trained with a
back-propagation algorithm. Additionally, the same method was used to
determine the relation between sewage sample odours and their related
Biochemical Oxygen Demand (BOD) values. The overall results have
indicated that ANNs can be used to classify the sewage samples
collected from different locations of a wastewater treatment plant.
Moreover, the electronic nose output could be used as an indicator in
monitoring the biochemical activities of wastewaters. (c) 2004 Elsevier
Ltd. All rights reserved.
BibTeX:
@article{ISI:000227657400003,
  author = {Onkal-Engin, G and Demir, I and Engin, S N},
  title = {Determination of the relationship between sewage odour and BOD by neural networks},
  journal = {ENVIRONMENTAL MODELLING & SOFTWARE},
  year = {2005},
  volume = {20},
  number = {7},
  pages = {843--850},
  doi = {10.1016/j.envsoft.2004.04.012}
}
Nuhoglu A, Keskinler B and Yildiz E (2005), "Mathematical modelling of the activated sludge process - the Erzincan case", PROCESS BIOCHEMISTRY. Vol. 40(7), pp. 2467-2473.
BibTeX:
@article{ISI:000228221800026,
  author = {Nuhoglu, A. and Keskinler, B and Yildiz, E},
  title = {Mathematical modelling of the activated sludge process - the Erzincan case},
  journal = {PROCESS BIOCHEMISTRY},
  year = {2005},
  volume = {40},
  number = {7},
  pages = {2467--2473},
  doi = {10.1016/j.procbio.2004.09.011}
}
Kobya M, Demirbas E, Senturk E and Ince M (2005), "Adsorption of heavy metal ions from aqueous solutions by activated carbon prepared from apricot stone", BIORESOURCE TECHNOLOGY. Vol. 96(13), pp. 1518-1521.
Abstract: Apricot stones were carbonised and activated after treatment with
sulphuric acid (1:1) at 200 degrees C for 24 h. The ability of the
activated carbon to remove Ni(II), Co(II), Cd(II), Cu(II), Pb(II),
Cr(III) and Cr(VI) ions from aqueous solutions by adsorption was
investigated. Batch adsorption experiments were conducted to observe
the effect of pH (1-6) on the activated carbon. The adsorptions of
these metals were found to be dependent on solution pH. Highest
adsorption occurred at 1-2 for Cr(VI) and 3-6 for the rest of the metal
ions, respectively. Adsorption capacities for the metal ions were
obtained in the descending order of Cr(VI) textgreater Cd(II) textgreater Co(II) textgreater Cr(III)
textgreater Ni(II) textgreater Cu(II) textgreater Pb(II) for the activated carbon prepared from
apricot stone (ASAC). (c) 2005 Elsevier Ltd. All rights reserved.
BibTeX:
@article{ISI:000230062000014,
  author = {Kobya, M and Demirbas, E and Senturk, E and Ince, M},
  title = {Adsorption of heavy metal ions from aqueous solutions by activated carbon prepared from apricot stone},
  journal = {BIORESOURCE TECHNOLOGY},
  year = {2005},
  volume = {96},
  number = {13},
  pages = {1518--1521},
  doi = {10.1016/j.biortech.2004.12.005}
}
Kobya A, Aydiner C and Demirbas E (2005), "Non-steady-state kinetic analysis of coupled transport of thiocyanate ions through binary liquid membranes", DESALINATION., may, 2005. Vol. 175(2), pp. 237-246.
BibTeX:
@article{ISI:000230252500010,
  author = {Kobya, A and Aydiner, C and Demirbas, E},
  title = {Non-steady-state kinetic analysis of coupled transport of thiocyanate ions through binary liquid membranes},
  journal = {DESALINATION},
  year = {2005},
  volume = {175},
  number = {2},
  pages = {237--246},
  doi = {10.1016/j.desal.2004.10.011}
}
Akyol A and Bayramoglu M (2005), "Photocatalytic degradation of Remazol Red F3B using ZnO catalyst", JOURNAL OF HAZARDOUS MATERIALS. Vol. 124(1-3), pp. 241-246.
Abstract: The photocatalytic degradation of aqueous solution of a commercial
azo-reactive textile dye, Remazol Red F3B, has been investigated in a
batch slurry reactor, in the presence of ZnO catalyst using two
different UV light sources emitting at 254 nm and 365 nm. The effects
of various process variables on degradation performance of the process
have been investigated. The results showed that decolourization and
total organic carbon (TOC) removal are both affected in the same manner
by the solution pH in the pH range 6-10, showing maxima at pH 7 and pH
10. They are inversely related to the dye concentration, they increase
in power-law with the light intensity. Decolourization is faster with
365 nm UV. TOC removal is not affected by UV wavelength in the initial
period up to 20 min, after which it progresses faster under 365 nm UV
radiation. These results indicate that the UV wavelength influences
especially the degradation rate of the intermediate products generated
during the initial period of the photocatalytic process. Finally,
catalyst loading affects both efficiencies in the same trend, which are
maximized at about 2 g/l catalyst loading. (c) 2005 Elsevier B.V. All
rights reserved.
BibTeX:
@article{ISI:000231403600032,
  author = {Akyol, A and Bayramoglu, M},
  title = {Photocatalytic degradation of Remazol Red F3B using ZnO catalyst},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2005},
  volume = {124},
  number = {1-3},
  pages = {241--246},
  doi = {10.1016/j.hazmat.2005.05.006}
}
Inan H and Baykal BB (2005), "Clinoptilolite: a possible support material for nitrifying biofilms for effective control of ammonium effluent quality?", WATER SCIENCE AND TECHNOLOGY. Vol. 51(11), pp. 63-70.
Abstract: Ammonium selective natural zeolite clinoptilolite is suggested as a
possible support material for nitrifying biofilms to help improve
effluent ammonium quality through its high capacity of ammonium removal
in the process of ion exchange. This will especially be helpful in
cases where the biofilter receives peak or variable loads routinely or
occasionally. At the time of peak loads or shocks of ammonium, ion
exchange capacity will provide a buffer for the effluent ammonium
quality. Data to support this suggestion is presented.
BibTeX:
@article{ISI:000231408900009,
  author = {Inan, H and Baykal, B B},
  title = {Clinoptilolite: a possible support material for nitrifying biofilms for effective control of ammonium effluent quality?},
  journal = {WATER SCIENCE AND TECHNOLOGY},
  year = {2005},
  volume = {51},
  number = {11},
  pages = {63--70}
}
Kurt A, Ozkan M, Sezen K, Demirbag Z and Ozcengiz G (2005), "Cry3Aa11: A new Cry3Aa delta-endotoxin from a local isolate of Bacillus thuringiensis", BIOTECHNOLOGY LETTERS. Vol. 27(15), pp. 1117-1121.
Abstract: A local isolate of Bacillus thuringiensis Mm2 had insecticidal activity
against the larvae of Melolontha melolontha, Agelastica alni,
Leptinotarsa decemlineata and Amphimallon solstitiale and produced a 65
kDa protein. SDS-PAGE profile of B. thuringiensis Mm2 was compared with
those of 29 different Cry3Aa producers which verified Cry3Aa
biosynthesis by the isolate. The cry3Aa gene of Mm2 was cloned,
sequenced and the deduced amino acid sequence was compared with the
cry3Aa sequences of ten different quaternary ranks. Its identity to
these sequences ranged between 97.4% and 99.2%. The gene was next
cloned into E. coli-Bacillus shuttle vector pNW33N and expressed at a
low level in B. subtilis 168.
BibTeX:
@article{ISI:000231501100010,
  author = {Kurt, A and Ozkan, M and Sezen, K and Demirbag, Z and Ozcengiz, G},
  title = {Cry3Aa11: A new Cry3Aa delta-endotoxin from a local isolate of Bacillus thuringiensis},
  journal = {BIOTECHNOLOGY LETTERS},
  year = {2005},
  volume = {27},
  number = {15},
  pages = {1117--1121},
  doi = {10.1007/s10529-005-8460-1}
}
Kurt A, Ozkan M and Ozcengiz G (2005), "Inorganic phosphate has a crucial effect on Cry3Aa delta-endotoxin production", LETTERS IN APPLIED MICROBIOLOGY. Vol. 41(4), pp. 303-308.
Abstract: Aims: The study aimed at increasing Cry3Aa delta-endotoxin production by
a local isolate of Bacillus thuringiensis (B.t. strain Mm2). To this
end, different nutritional conditions were tested for their effects on
Cry3Aa yields.
Methods and Results: Bacillus thuringiensis Mm2 was grown by shaking at
30 degrees C in different media. Samples were taken from the cultures at
intervals and used for protein extraction. SDS-PAGE was performed for
toxin analysis. Inclusion of inorganic phosphate (Pi) into the Difco's
sporulation medium at an increased level of 200 mmol l(-1) caused a
fivefold increase (from 3 to 15.6 mu g ml(-1)) in toxin production.
Omission of FeSO4 from the medium decreased this yield by half.
Resuspension experiments suggested catabolite repression of toxin
biosynthesis by glucose. The inclusion of high Pi invariably increased
toxin synthesis, even in the absence of sugars.
Conclusions: Inorganic phosphate had the most striking effect on toxin
biosynthesis. Iron effect was found to be unique to our isolate whereas
Pi effect seemed to be common to the biosynthesis of Cry3Aa-type toxins.
Stimulation of toxin synthesis by Pi did not seem to represent a relief
from glucose repression.
Significance and Impact of the Study: Bacillus thuringiensis is the most
versatile biopesticide for use in pest management. Regarding
cost-effectiveness of related fermentations, high Pi supplement
drastically increases Coleoptera-specific toxin synthesis.
BibTeX:
@article{ISI:000231864000002,
  author = {Kurt, A and Ozkan, M and Ozcengiz, G},
  title = {Inorganic phosphate has a crucial effect on Cry3Aa delta-endotoxin production},
  journal = {LETTERS IN APPLIED MICROBIOLOGY},
  year = {2005},
  volume = {41},
  number = {4},
  pages = {303--308},
  doi = {10.1111/j.1472-765X.2005.01776.x}
}
Yilmaz AE, Boncukcuoglu R, Kocakerim MM and Keskinler B (2005), "The investigation of parameters affecting boron removal by electrocoagulation method", JOURNAL OF HAZARDOUS MATERIALS. Vol. 125(1-3), pp. 160-165.
Abstract: Boron removal from wastewaters by electrocoagulation using aluminum
electrode material was investigated in this paper. Several working
parameters, such as pH, current density, boron concentration and type
and concentration of supporting electrolyte were studied in an attempt
to achieve a higher removal capacity. The experiments were carried out
by keeping the pH of solution constant and optimum pH of solution was
determined 8.0 for the aluminum electrode. Although energy consumption
increased with decreasing boron concentration, which conductivity of
these solutions were low, boron removal efficiency was higher at 100
mg/L than that of 1000 mg/L. Current density was an important parameter
affecting removal efficiency. Boron removal efficiency and energy
consumption increased with increasing current density from 1.2 to 6.0
mA/cm(2). The types of different supporting electrolyte were
experimented in order to investigate to this parameter effect on boron
removal. The highest boron removal efficiency, 97%, was found by CaCl2
Added CaCl2 increased more the conductivity of solution according to
other supporting electrolytes, but decreased energy consumption. The
results showed to have a high effectiveness of the electrocoagulation
method in removing boron from aqueous solutions. (c) 2005 Elsevier B.V.
All rights reserved.
BibTeX:
@article{ISI:000231914900018,
  author = {Yilmaz, A E and Boncukcuoglu, R and Kocakerim, M M and Keskinler, B},
  title = {The investigation of parameters affecting boron removal by electrocoagulation method},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2005},
  volume = {125},
  number = {1-3},
  pages = {160--165},
  doi = {10.1016/j.jhazmat.2005.05.020}
}
Aydiner C, Kobya M and Demirbas E (2005), "Cyanide ions transport from aqueous solutions by using quaternary ammonium salts through bulk liquid membranes", DESALINATION. Vol. 180(1-3), pp. 139-150.
BibTeX:
@article{ISI:000231944600016,
  author = {Aydiner, C and Kobya, M and Demirbas, E},
  title = {Cyanide ions transport from aqueous solutions by using quaternary ammonium salts through bulk liquid membranes},
  journal = {DESALINATION},
  year = {2005},
  volume = {180},
  number = {1-3},
  pages = {139--150},
  doi = {10.1016/j.desal.2005.01.003}
}
Onkal-Engin G, Demir I and Engin SN (2005), "e-NOSE response classification of sewage odors by neural networks and fuzzy clustering", In ADVANCES IN NATURAL COMPUTATION, PT 2, PROCEEDINGS. Vol. 3611, pp. 648-651.
BibTeX:
@inproceedings{ISI:000232222500092,
  author = {Onkal-Engin, G and Demir, I and Engin, S N},
  editor = {Wang, L and Chen, K and Ong, YS},
  title = {e-NOSE response classification of sewage odors by neural networks and fuzzy clustering},
  booktitle = {ADVANCES IN NATURAL COMPUTATION, PT 2, PROCEEDINGS},
  year = {2005},
  volume = {3611},
  pages = {648--651}
}
Assa P, Ozkan M and Ozcengiz G (2005), "Thermostability and regulation of Clostridium thermocellum L-lactate dehydrogenase expressed in Escherichia coli", ANNALS OF MICROBIOLOGY. Vol. 55(3), pp. 193-197.
Abstract: In this study, L-lactate dehydrogenase (L-LDH) of Clostridium
thermocellum previously cloned aid expressed in Escherichia coli FMJ39
was partially purified and characterised. Optimum temperature and pH of
the enzyme were found as 50 degrees C and 7.5, respectively. Different
concentrations of Mn2+ did not affect the enzyme activity. Addition of
20-30 mM Mg2+, or the other hand, increased the LDH activity by about
10%. Relatively high concentrations of NaCl (2 M),
fructose-1,6-diphosphate (FDP, 5 mM), ATP (10 mM) and NAD (40 mM)
decreased LDH activity by 36, 25, 40 and 100%, respectively. Oxamate
and oxalate inhibited LDH activity by 41 and 28%, respectively, when
each was added at a concentration of 0.5 mM. When compared to its
non-thermotolerant counterparts, the enzyme was found to be very stable
when incubated at room temperature, 4 degrees C and even at 50 degrees
C.
BibTeX:
@article{ISI:000232444500006,
  author = {Assa, P and Ozkan, M and Ozcengiz, G},
  title = {Thermostability and regulation of Clostridium thermocellum L-lactate dehydrogenase expressed in Escherichia coli},
  journal = {ANNALS OF MICROBIOLOGY},
  year = {2005},
  volume = {55},
  number = {3},
  pages = {193--197}
}
Oguz E and Keskinler B (2005), "Determination of adsorption capacity and thermodynamic parameters of the PAC used for bomaplex red CR-L dye removal", COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS. Vol. 268(1-3), pp. 124-130.
BibTeX:
@article{ISI:000233079200020,
  author = {Oguz, E and Keskinler, B},
  title = {Determination of adsorption capacity and thermodynamic parameters of the PAC used for bomaplex red CR-L dye removal},
  journal = {COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS},
  year = {2005},
  volume = {268},
  number = {1-3},
  pages = {124--130},
  doi = {10.1016/j.colsurfa.2005.06.026}
}
Pennell KD, Karagunduz A and Young MH (2004), "Impacts of surfactant adjuvants on pesticide availability and transport in soils", In PESTICIDE DECONTAMINATION AND DETOXIFICATION. Vol. 863, pp. 231-245.
Abstract: Surfactants are frequently added to pesticide and herbicide
formulations as adjuvants to improve handling, delivery and
effectiveness. From a regulatory perspective such additives are
generally considered to be inert, and their influence on co-contaminant
fate and transport processes has been largely ignored. The objective of
this chapter is to illustrate the potential effects of representative
surfactant adjuvants on the phase distribution and availability of
hydrophobic organic compounds (HOCs), soil water retention and water
flow in unsaturated soils. Although the addition of surfactants at
concentrations above the critical micelle concentration (CMC) is shown
to enhance the total aqueous-phase concentration of HOCs, the free
(non-micellar) aqueous phase HOC concentration decreases with
increasing surfactant concentration. Results of pressure-saturation
studies and one-dimensional column experiments demonstrate that
surfactants can substantially reduce soil water retention and alter
unsaturated water flow. These findings demonstrate the need to
carefully consider the influence of surfactant adjuvants on both soil
water characteristics and agrochemical fate and transport in the
environment.
BibTeX:
@inproceedings{ISI:000186888400017,
  author = {Pennell, K D and Karagunduz, A and Young, M H},
  editor = {Gan, JJ and Zhu, PC and Aust, SD and Lemley, AT},
  title = {Impacts of surfactant adjuvants on pesticide availability and transport in soils},
  booktitle = {PESTICIDE DECONTAMINATION AND DETOXIFICATION},
  year = {2004},
  volume = {863},
  pages = {231--245}
}
Keskinler B, Erhan E, Akay G, Kaya M and Bayguven B (2004), "Microfiltration of whey proteins adsorbed on yeast cells", INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY. Vol. 39(1), pp. 71-78.
Abstract: Soluble whey proteins (WPs), adsorbed on yeast cells, were recovered by
a crossflow microfiltration (MF) technique using a cellulose nitrate
membrane with a pore size of 0.45 mum. The crossflow velocity was 1.5 m
s(-1) with a transmembrane pressure of 200 kPa at 25degreesC. A series
of protein rejections occured at various pH values ranging from 2 to 8.
WPs adsorbed more on to yeast cells at low pH (pH textless 4) than at high pH
values, probably because they were positively charged at low pH. It was
also shown that permeate flux increased and Modified Membrane Fouling
Index values decreased at low pH levels. When the yeast concentration
was 50 g L-1, the flux decreased five times compared with that in the
absence of yeast. Protein recovery increased with increasing yeast
concentrations. The highest protein recovery was found to be 85% at a
yeast concentration of 50 g L-1 at a steady state flux rate of 10(-6) m
s(-1) at 25degreesC. When diluted solutions of whey were used, the same
rejection of protein, adsorbed on yeast cells, was achieved at ten
times lower amounts of yeast cells. This technique not only provides
for the recovery of protein but also may give rise to the direct use of
yeast cells, which are rich in protein, in the baking industry. WPs
absorbed by yeast cells can be used to produce nutritionally rich
products in areas where yeasts have been already used.
BibTeX:
@article{ISI:000187405700008,
  author = {Keskinler, B and Erhan, E and Akay, G and Kaya, M and Bayguven, B},
  title = {Microfiltration of whey proteins adsorbed on yeast cells},
  journal = {INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY},
  year = {2004},
  volume = {39},
  number = {1},
  pages = {71--78}
}
Erhan E, Yer E, Akay G, Keskinler B and Keskinler D (2004), "Phenol degradation in a fixed-bed bioreactor using micro-cellular polymer-immobilized Pseudomonas syringae", JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. Vol. 79(2), pp. 195-206.
Abstract: Highly porous (85% void volume) polymer beads with interconnecting
micro-pores were prepared for the immobilization of Pseudomonas syringae
for the degradation of phenol in a fixed-bed column bioreactor. The
internal architecture of this support material (also known as PolyHIPE
Polymer) could be controlled through processing before the
polymerization stage. The transient and steady state phenol utilization
rates were measured as a function of substrate solution flow rate and
initial substrate concentration. The spatial concentration of the
bacteria on the micro-porous support particles as well as within them
was studied using scanning electron microscopy at various time intervals
during the continuous operation of the bioreactor. It was found that
although bacterial penetration into the porous support was present after
20 days, bacterial viability however, was compromised after 120 days as
a result of the formation of a biofilm on the support particles. The
steady state phenol utilization at an initial phenol concentration of
200 mg cm(-3) was 100% provided that the flow rate was less than 7
cm(3) min(-1). Substrate inhibition at a constant flow rate of 4.5 cm(3)
min(-1) was found to begin at 720 mg dm(-3). The critical dilution rate
for bacteria washout was high as a result of the highly hydrophobic
nature of the support and the reduction of pore interconnect size due to
bacterial growth within the pores in the vicinity of the surface of the
support. (C) 2004 Society of Chemical Industry.
BibTeX:
@article{ISI:000188500900012,
  author = {Erhan, E and Yer, E and Akay, G and Keskinler, B and Keskinler, D},
  title = {Phenol degradation in a fixed-bed bioreactor using micro-cellular polymer-immobilized Pseudomonas syringae},
  journal = {JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY},
  year = {2004},
  volume = {79},
  number = {2},
  pages = {195--206},
  doi = {10.1002/jctb.938}
}
Kobya M, Demirbas E, Demircioglu N, Yildirim Y and Yildiz YS (2004), "Effect of carrier type on coupled transport kinetics of thiocyanate ions through liquid membranes", DESALINATION. Vol. 160(3), pp. 253-262.
BibTeX:
@article{ISI:000188718800004,
  author = {Kobya, M and Demirbas, E and Demircioglu, N and Yildirim, Y and Yildiz, Y S},
  title = {Effect of carrier type on coupled transport kinetics of thiocyanate ions through liquid membranes},
  journal = {DESALINATION},
  year = {2004},
  volume = {160},
  number = {3},
  pages = {253--262}
}
Kobya M (2004), "Removal of Cr(VI) from aqueous solutions by adsorption onto hazelnut shell activated carbon: kinetic and equilibrium studies", BIORESOURCE TECHNOLOGY. Vol. 91(3), pp. 317-321.
Abstract: The adsorption Cr(VI) from aqueous solutions onto hazelnut shell
activated carbon was carried out by varying the parameters such as pH,
initial Cr(VI) concentration and temperature. The experimental data
fitted well to the pseudo first-order kinetic model and then the rate
constants were evaluated. The Langmuir isotherm provided the best
correlation for Cr(VI) onto the activated carbon. Adsorption capacity
was calculated from the Langmuir isotherm as 170 mg/g at an initial pH
of 1.0 for the 1000 mg/l Cr(VI) solution. Thermodynamic parameters were
evaluated and the adsorption is endothermic showing monolayer
adsorption of Cr(VI). (C) 2003 Elsevier Ltd. All rights reserved.
BibTeX:
@article{ISI:000188981700013,
  author = {Kobya, M},
  title = {Removal of Cr(VI) from aqueous solutions by adsorption onto hazelnut shell activated carbon: kinetic and equilibrium studies},
  journal = {BIORESOURCE TECHNOLOGY},
  year = {2004},
  volume = {91},
  number = {3},
  pages = {317--321},
  doi = {10.1016/j.biortech.2003.07.001}
}
Bektas N, Akbulut H, Inan H and Dimoglo A (2004), "Removal of phosphate from aqueous solutions by electro-coagulation", JOURNAL OF HAZARDOUS MATERIALS. Vol. 106(2-3), pp. 101-105.
Abstract: The aim of this paper was to investigate the feasibility of the removal
of phosphate from aqueous solution by electro-coagulation (EC). The
current density (CD) between 2.5 and 10 mA cm(-2) and duration in the
limits of 5-20 min were tried for different concentrations. In order to
determine optimal operating conditions, the EC process used for the
phosphate removal was examined in dependence with the CD, initial
concentrations and time. The results of the experimental batch
processing showed high effectiveness of the EC method in removing
phosphate from aqueous solutions. 2003 (C) Elsevier B.V. All rights
reserved.
BibTeX:
@article{ISI:000189111700004,
  author = {Bektas, N and Akbulut, H and Inan, H and Dimoglo, A},
  title = {Removal of phosphate from aqueous solutions by electro-coagulation},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2004},
  volume = {106},
  number = {2-3},
  pages = {101--105},
  doi = {10.1016/j.jhazmat.2003.10.002}
}
Inan H, Dimoglo A, Simsek H and Karpuzcu A (2004), "Olive oil mill wastewater treatment by means of electro-coagulation", SEPARATION AND PURIFICATION TECHNOLOGY. Vol. 36(1), pp. 23-31.
Abstract: The removal of chemical oxygen demand (COD), color and suspended solid
(SS) from olive oil mill wastewater (OMWW) was experimentally
investigated by using electro-coagulation (EC). Aluminum and iron were
used in the reactor simultaneously as materials for electrodes. The
reactor voltage was 12 V, current density (CD) was changing between 10
and 40 mA cm(-2), pH was taken equal to 4, 6, 7, and 9 units, and
duration varied in the limits of 2-30 min. Under the 30-min retention
time, 52% COD was removed by the aluminum anode and 42% was removed by
the iron anode. CD efficiency versus the percent of COD removal was
examined at the 10-min retention time for pH 6.2 +/- 10.2. It appeared
that with the CD increase, the percent of COD removal was increasing as
well. The color removal yield was examined as the result of using
different retention times, current densities, and iron and aluminum as
materials for anodes. CD values in the range of 10-40 mA cm(-2) were
tested at the 10-min retention time each one; color removal was 90-97%
by this. In this study the EC process was examined with the aim of
determining the highest rate of SS removal from the OMWW as well. (C)
2003 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000220302200003,
  author = {Inan, H and Dimoglo, A and Simsek, H and Karpuzcu, A},
  title = {Olive oil mill wastewater treatment by means of electro-coagulation},
  journal = {SEPARATION AND PURIFICATION TECHNOLOGY},
  year = {2004},
  volume = {36},
  number = {1},
  pages = {23--31},
  doi = {10.1016/s1383-5866(03)00148-5}
}
Keskinler B, Yildiz E, Erhan E, Dogru M, Bayhan Y and Akay G (2004), "Crossflow microfiltration of low concentration-nonliving yeast suspensions", JOURNAL OF MEMBRANE SCIENCE. Vol. 233(1-2), pp. 59-69.
BibTeX:
@article{ISI:000220761300007,
  author = {Keskinler, B and Yildiz, E and Erhan, E and Dogru, M and Bayhan, Y and Akay, G},
  title = {Crossflow microfiltration of low concentration-nonliving yeast suspensions},
  journal = {JOURNAL OF MEMBRANE SCIENCE},
  year = {2004},
  volume = {233},
  number = {1-2},
  pages = {59--69},
  doi = {10.1016/j.memsci.2003.12.014}
}
Kobya M (2004), "Adsorption, kinetic and equilibrium studies of Cr(VI) by hazelnut shell activated carbon", ADSORPTION SCIENCE & TECHNOLOGY. Vol. 22(1), pp. 51-64.
Abstract: The adsorption of chromium(VI) from aqueous solutions on to hazelnut
shell activated carbon (HSAC) was investigated. The adsorption was
carried out by varying parameters such as the agitation time, the
initial solution pH, the initial Cr(VI) concentration and the
temperature. The experimental data were well fitted by the
pseudo-first-order kinetic model allowing the rate constants to be
evaluated. The Langmuir isotherm provided the best correlation for the
adsorption of Cr(VI) onto the activated carbon. The adsorption of
Cr(VI) was pH-dependent. The adsorption capacity as calculated from the
Langmuir isotherm was 170 mg/g at an initial pH of 1.0 for a Cr(VI)
solution of 1000 mg/l concentration. Thermodynamic parameters were
evaluated, indicating that the adsorption was endothermic and involved
monolayer adsorption of Cr(VI).
BibTeX:
@article{ISI:000221000900005,
  author = {Kobya, M},
  title = {Adsorption, kinetic and equilibrium studies of Cr(VI) by hazelnut shell activated carbon},
  journal = {ADSORPTION SCIENCE & TECHNOLOGY},
  year = {2004},
  volume = {22},
  number = {1},
  pages = {51--64}
}
Bektas N and Soysal D (2004), "Kinetics of phosphate removal using surfactant modified clinoptilolite", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 13(4), pp. 366-369.
Abstract: In this work, the preliminary results on the removal pathways for
phosphate ions from aqueous solution using surfactant-modified
clinoptilolite (SMC) were investigated. The chemical kinetic describes
the time course of reaction pathways to reach the equilibrium, whereas
chemical equilibrium gives no information about pathways and reaction
rates. Langmuir and Freundlich isotherm constants and correlation
coefficients for the present system were calculated and compared. The
equilibrium process of phosphate removal was described well by the
Langmuir isotherm. The sorption kinetic was tested for Elovich,
pseudo-first order and pseudo-second order reaction models. The rate
constants of sorption for all these kinetic models were calculated. The
pseudo-second order kinetic reaction model was found to be the best for
correlation of the data for phosphate removal from aqueous solution
using modified clinoptilolite.
BibTeX:
@article{ISI:000221097500012,
  author = {Bektas, N and Soysal, D},
  title = {Kinetics of phosphate removal using surfactant modified clinoptilolite},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2004},
  volume = {13},
  number = {4},
  pages = {366--369}
}
Basar CA, Karagunduz A, Cakici A and Keskinler B (2004), "Removal of surfactants by powered activated carbon and microfiltration", WATER RESEARCH. Vol. 38(8), pp. 2117-2124.
BibTeX:
@article{ISI:000221204500019,
  author = {Basar, C A and Karagunduz, A and Cakici, A and Keskinler, B},
  title = {Removal of surfactants by powered activated carbon and microfiltration},
  journal = {WATER RESEARCH},
  year = {2004},
  volume = {38},
  number = {8},
  pages = {2117--2124},
  doi = {10.1016/j.watres.2004.02.001}
}
Bayramoglu M, Kobya M, Can OT and Sozbir M (2004), "Operating cost analysis of electrocoagulation of textile dye wastewater", SEPARATION AND PURIFICATION TECHNOLOGY. Vol. 37(2), pp. 117-125.
Abstract: Electrocoagulation (EC) is an efficient method for textile wastewater
treatment. Researches are mainly focused on the technical performance
of this process, while its economic aspect has been Usually neglected.
This paper deals with a simplified operating cost analysis for the
treatment of a textile wastewater by EC using iron and aluminium
electrode materials. The effects of various parameters such as
wastewater conductivity and pH, current density and operating time, on
the operating cost have been discussed for two electrode materials,
separately. (C) 2003 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000221939900003,
  author = {Bayramoglu, M and Kobya, M and Can, O T and Sozbir, M},
  title = {Operating cost analysis of electrocoagulation of textile dye wastewater},
  journal = {SEPARATION AND PURIFICATION TECHNOLOGY},
  year = {2004},
  volume = {37},
  number = {2},
  pages = {117--125},
  doi = {10.1016/j.seppur.2003.09.002}
}
Bingol A, Ucun H, Bayhan YK, Karagunduz A, Cakici A and Keskinler B (2004), "Removal of chromate anions from aqueous stream by a cationic surfactant-modified yeast", BIORESOURCE TECHNOLOGY. Vol. 94(3), pp. 245-249.
BibTeX:
@article{ISI:000222196200003,
  author = {Bingol, A and Ucun, H and Bayhan, Y K and Karagunduz, A and Cakici, A and Keskinler, B},
  title = {Removal of chromate anions from aqueous stream by a cationic surfactant-modified yeast},
  journal = {BIORESOURCE TECHNOLOGY},
  year = {2004},
  volume = {94},
  number = {3},
  pages = {245--249},
  doi = {10.1016/j.biotech.2004.01.018}
}
Onkal-Engin G, Demir I and Hiz H (2004), "Assessment of urban air quality in Istanbul using fuzzy synthetic evaluation", ATMOSPHERIC ENVIRONMENT. Vol. 38(23), pp. 3809-3815.
Abstract: Little attention was paid to growing air quality concerns until about a
decade earlier in Istanbul. With a population of over 12 million people
and some occurred episodes imposed threats to the local government, and
continuous monitoring of the urban air quality was started about a
decade ago. This is part of a national strategy program which includes
urban air quality assessment. This paper addresses a methodology for
urban air quality using fuzzy synthetic evaluation techniques. The
European part of Istanbul was selected for this purpose. Air pollutants
data such as sulphur dioxide (SO2), carbon monoxide (CO), nitrogen
dioxide (NO2) ozone (O-3), and total suspended particulate matter (PM)
collected at five different air quality monitoring stations located in
western part of Istanbul was used in this evaluation. The results
obtained were compared to those applied to EPA air quality index. It
was demonstrated that fuzzy synthetic evaluation techniques are quite
appropriate techniques for air quality management. A case study was
presented for this purpose. 2004 Elsevier Ltd. All rights reserved.
BibTeX:
@article{ISI:000222569600008,
  author = {Onkal-Engin, G and Demir, I and Hiz, H},
  title = {Assessment of urban air quality in Istanbul using fuzzy synthetic evaluation},
  journal = {ATMOSPHERIC ENVIRONMENT},
  year = {2004},
  volume = {38},
  number = {23},
  pages = {3809--3815},
  doi = {10.1016/j.atmosenv.2004.03.058}
}
Nuhoglu A, Yildiz E, Keskinler B and Karpuzcu M (2004), "Wastewater characterization and performance upgrading of a domestic wastewater treatment plant: the Erzincan case", INTERNATIONAL JOURNAL OF ENVIRONMENT AND POLLUTION. Vol. 21(5), pp. 440-456.
Abstract: A detailed characterization of the incoming wastewater and a
performance evaluation were carried out for the domestic wastewater
treatment plant of Erzincan City. Conventional characterization results
showed that Erzincan has a medium strength wastewater quality.
Structural characterization of the chemical oxygen demand (COD)
indicated that the biodegradable fraction of the total COD was 64.7%.
The soluble inert fraction was computed as 10.9% of the total COD. In
Erzincan, an activated sludge plant provides secondary treatment using
Carrousel treatment units. Because some operational problems, such as
sludge bulking and foaming, have been experienced, and performance
failures related to carbonaceous matter removal have been recorded many
times, a new operational strategy suitable for this type of treatment
plant was developed. In the new strategy the sludge age was kept at 22
days, intermittent aeration was abandoned and replaced by continuous
aeration, and the sludge recycle ratio was increased to 1.35 from 0.85.
The developed operational strategy showed its merit in that previous
operational problems largely disappeared and COD concentrations
remained below the Turkish discharge limits of 100 mg/l and the NH4
removal rate was in the range 87-95%.
BibTeX:
@article{ISI:000222602000003,
  author = {Nuhoglu, A and Yildiz, E and Keskinler, B and Karpuzcu, M},
  title = {Wastewater characterization and performance upgrading of a domestic wastewater treatment plant: the Erzincan case},
  journal = {INTERNATIONAL JOURNAL OF ENVIRONMENT AND POLLUTION},
  year = {2004},
  volume = {21},
  number = {5},
  pages = {440--456}
}
Bektas N, Agim BA and Kara S (2004), "Kinetic and equilibrium studies in removing lead ions from aqueous solutions by natural sepiolite", JOURNAL OF HAZARDOUS MATERIALS. Vol. 112(1-2), pp. 115-122.
Abstract: The capacity of sepiolite for the removal of lead ions from aqueous
solution was investigated under different experimental conditions. The
Langmuir and Freundlich equations, which are in common use for
describing sorption equilibrium for wastewater-treatment applications,
were applied to data. The constants and correlation coefficients of
these isotherm models for the present system at different conditions
such as pH. temperature and particle size were calculated and compared.
The equilibrium process was well described by the Langmuir isotherm
model and the maximum sorption capacity was found to be 93.4 mg/g for
the optimal experimental condition. The thermodynamic parameters
(DeltaGdegrees, DeltaHdegrees and DeltaSdegrees) for lead sorption on
the sepiolite were also determined from the temperature dependence. The
influences of specific parameters such as the agitation speed, particle
size and initial concentration for the kinetic studies were also
examined. The sorption kinetics were tested for first order reversible,
pseudo-first order and pseudo-second order reaction and the rate
constants of kinetic models were calculated. The best correlation
coefficients were obtained using the pseudo-second order kinetic model,
indicating that lead uptake process followed the pseudo-second order
rate expression. (C) 2004 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000222722500012,
  author = {Bektas, N and Agim, B A and Kara, S},
  title = {Kinetic and equilibrium studies in removing lead ions from aqueous solutions by natural sepiolite},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2004},
  volume = {112},
  number = {1-2},
  pages = {115--122},
  doi = {10.1016/j.jhazmat.2004.04.015}
}
Kazanci N, Leroy S, Ileri O, Emre O, Kibar M and Oncel S (2004), "Late holocene erosion in NW Anatolia from sediments of Lake Manyas, Lake Ulubat and the southern shelf of the Marmara Sea, Turkey", CATENA. Vol. 57(3), pp. 277-308.
Abstract: This paper deals with modem and ancient sedimentation in fresh water
lakes and the marine shelf of the southern Marmara region, NW Anatolia,
Turkey. Most of the information has been obtained from monitoring of
suspended load discharged into two lakes (Manyas and Ulubat) in the last
45 years and from 8 to 11 m thick lacustrine sediments, in addition to
radiocarbon-dated shelf sediments. This allows a holistic approach to
the drainage basin denudation over time. The results show that the
sedimentation rates in the lakes were low 0.22 cm year(-1), from 4000 to
2000 years BP and then they increased (0.29 cm year(-1)) up to
sub-recent times and reached 0.44 cm year(-1) in the last century. It is
suggested that deforestation created high rates of sedimentation in the
basins and/or strong denudation of the region during the Late Holocene.
This study also shows that for shallow freshwater lakes the calculation
of sedimentation rates must include fine particles lost by the outlets
and coarse-grained bed load deposited on their shores. In addition, a
high rate of sedimentation has been created by short, but repetitive
intense depositions. During the last century particularly during the
last 45 years, the rate of sedimentation or denudation has increased
dramatically in NW Turkey. The two World Wars and mismanagement of the
land had important local effects by increasing deforestation and
resulting in the present erosive conditions. (C) 2003 Elsevier B.V. All
rights reserved.
BibTeX:
@article{ISI:000222844900005,
  author = {Kazanci, N and Leroy, S and Ileri, O and Emre, O and Kibar, M and Oncel, S},
  title = {Late holocene erosion in NW Anatolia from sediments of Lake Manyas, Lake Ulubat and the southern shelf of the Marmara Sea, Turkey},
  journal = {CATENA},
  year = {2004},
  volume = {57},
  number = {3},
  pages = {277--308},
  doi = {10.1016/j.catena.2003.11.004}
}
Yatmaz HC, Akyol A and Bayramoglu M (2004), "Kinetics of the photocatalytic decolorization of an Azo reactive dye in aqueous ZnO suspensions", INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. Vol. 43(19), pp. 6035-6039.
Abstract: The photocatalytic decolorization of Remazol Red RR, a commercial azo
reactive textile dye, in ZnO suspension, has been investigated in a
quartz batch reactor with the use of artificial light source (UV-C).
The reaction kinetics are modeled by pseudo-first-order rate law.
Regression analysis related pseudo-first-order rate constant, k, to the
catalyst loading, empirically as k proportional to [ZnO](0.6). The
decolorization rate increases with increasing pH, attaining maximum
value at pH 10. The rate constant is inversely related to the initial
dye concentration, empirically according to the relation k proportional
to [C-0](-1.5). Finally, the rate constant is found proportional to
the square root of the light intensity as k proportional to [I]
(0.5). These empirical models are therefore combined as k proportional
to [ZnO](0.6) [Co](-1.5) [I](0.5).
BibTeX:
@article{ISI:000223807400010,
  author = {Yatmaz, H C and Akyol, A and Bayramoglu, M},
  title = {Kinetics of the photocatalytic decolorization of an Azo reactive dye in aqueous ZnO suspensions},
  journal = {INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH},
  year = {2004},
  volume = {43},
  number = {19},
  pages = {6035--6039},
  doi = {10.1021/ie049921z}
}
Farizoglu B, Keskinler B, Yildiz E and Nuhoglu A (2004), "Cheese whey treatment performance of an aerobic jet loop membrane bioreactor", PROCESS BIOCHEMISTRY. Vol. 39(12), pp. 2283-2291.
BibTeX:
@article{ISI:000223925500063,
  author = {Farizoglu, B and Keskinler, B and Yildiz, E and Nuhoglu, A},
  title = {Cheese whey treatment performance of an aerobic jet loop membrane bioreactor},
  journal = {PROCESS BIOCHEMISTRY},
  year = {2004},
  volume = {39},
  number = {12},
  pages = {2283--2291},
  doi = {10.1016/j.procbio.2003.11.028}
}
Bektas N and Kara S (2004), "Removal of lead from aqueous solutions by natural clinoptilolite: equilibrium and kinetic studies", SEPARATION AND PURIFICATION TECHNOLOGY. Vol. 39(3), pp. 189-200.
BibTeX:
@article{ISI:000224049900006,
  author = {Bektas, N and Kara, S},
  title = {Removal of lead from aqueous solutions by natural clinoptilolite: equilibrium and kinetic studies},
  journal = {SEPARATION AND PURIFICATION TECHNOLOGY},
  year = {2004},
  volume = {39},
  number = {3},
  pages = {189--200},
  doi = {10.1016/j.seppur.2003.12.001}
}
Akyol A, Yatmaz HC and Bayramoglu M (2004), "Photocatalytic decolorization of remazol red RR in aqueous ZnO suspensions", APPLIED CATALYSIS B-ENVIRONMENTAL. Vol. 54(1), pp. 19-24.
Abstract: The photocatalytic decolorization of aqueous solutions of Remazol Red
RR, a commercial azo-reactive textile dye, in the presence of various
semiconductor powder suspensions has been investigated in a quartz batch
reactor with the use of artificial light sources (UV-C). ZnO and TiO2
have been found the most active photocatalysts; however ZnO indicated
slightly higher efficiency. The effects of various process variables on
decolorization performance of the process have been investigated. The
results showed that the decolorization efficiency increases with
increase in pH, attaining maximum value at pH 10 for ZnO. The zero-point
charge for ZnO is 9.0 above which ZnO surface is negatively charged by
adsorbed OH- ions, favoring the formation of strong oxidant OH*
radicals. The efficiency is inversely related to the dye concentration;
increasing dye concentration enhances dye adsorption on the active sites
of the catalyst surface, and consequently hinders OH- adsorption on the
same sites, this results with a decreasing OH* formation rate. (C)
2004 Elsevier B.V. All rights reserved.
BibTeX:
@article{ISI:000224354900003,
  author = {Akyol, A and Yatmaz, H C and Bayramoglu, M},
  title = {Photocatalytic decolorization of remazol red RR in aqueous ZnO suspensions},
  journal = {APPLIED CATALYSIS B-ENVIRONMENTAL},
  year = {2004},
  volume = {54},
  number = {1},
  pages = {19--24},
  doi = {10.1016/j.apcatb.2004.05.021}
}
Demirbas E, Kobya M, Senturk E and Ozkan T (2004), "Adsorption kinetics for the removal of chromium (VI) from aqueous solutions on the activated carbons prepared from agricultural wastes", WATER SA. Vol. 30(4), pp. 533-539.
BibTeX:
@article{ISI:000225053800013,
  author = {Demirbas, E and Kobya, M and Senturk, E and Ozkan, T},
  title = {Adsorption kinetics for the removal of chromium (VI) from aqueous solutions on the activated carbons prepared from agricultural wastes},
  journal = {WATER SA},
  year = {2004},
  volume = {30},
  number = {4},
  pages = {533--539}
}
Yuksel E (2004), "Effect of specific energy variation on lateral overflows", FLOW MEASUREMENT AND INSTRUMENTATION. Vol. 15(5-6), pp. 259-269.
Abstract: A numerical model was used to study the effect of change in specific
energy height along a side weir on flow. Discharge coefficient was
considered as a local variable that includes flow depth and the angle
of the deflected water jet along side weir. Hydraulic profile on the
weir plane and the hydraulic head on the weir were obtained using two
dimensionless parameters psi and m as a function of Froude number. Flow
depths and flow rates were then computed and minimum standard errors
were determined based upon these parameters. The agreement between
computed values and observations was demonstrated. It was concluded
that rates of flow are considerably affected by the variation of
specific energy along the side weir when weir head is based on flow
depth at the weir plane. Considerable deviations from the constant
specific energy assumption may be observed in this case specially when
a great change in flow rates exists along side weirs with zero end
discharges. (C) 2004 Elsevier Ltd. All rights reserved.
BibTeX:
@article{ISI:000225143000003,
  author = {Yuksel, E},
  title = {Effect of specific energy variation on lateral overflows},
  journal = {FLOW MEASUREMENT AND INSTRUMENTATION},
  year = {2004},
  volume = {15},
  number = {5-6},
  pages = {259--269},
  doi = {10.1016/j.flowmeasinst.2004.06.005}
}
Kobya M, Demirbas E and Bayramoglu M (2004), "Modelling the effects of adsorbent dose and particle size on the adsorption of Cr(VI) ions from aqueous solutions", ADSORPTION SCIENCE & TECHNOLOGY. Vol. 22(7), pp. 583-594.
Abstract: Activated carbon was prepared from hazelnut shell with chemical
carbonization using concentrated sulphuric acid. The adsorption tests
were carried out in an agitated batch system with a fixed initial
Cr(VI) ion concentration and varying adsorbent particle sizes and
doses. The adsorption of Cr(VI) ions correlated strongly with these two
variables. Two simple empirical models were examined for predicting the
percentage of Cr(VI) ion adsorbed. Both models exhibited good
correlation coefficients. The best model was selected on the basis of
the standard deviation between the calculated and experimental values.
The Freundlich adsorption isotherm provided the best correlation for
the adsorption of Cr(VI) ions onto the carbon. This isotherm was used
to fit the experimental adsorption capacity data and allowed the model
parameters to be calculated and correlated with the particle size.
BibTeX:
@article{ISI:000225929300006,
  author = {Kobya, M and Demirbas, E and Bayramoglu, M},
  title = {Modelling the effects of adsorbent dose and particle size on the adsorption of Cr(VI) ions from aqueous solutions},
  journal = {ADSORPTION SCIENCE & TECHNOLOGY},
  year = {2004},
  volume = {22},
  number = {7},
  pages = {583--594}
}
Oncel MS, Zedef V and Mert S (2004), "Lead contamination of roadside soils and plants in the highways between Istanbul and Sakarya, NW Turkey", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 13(12B), pp. 1525-1529.
BibTeX:
@article{ISI:000226819600012,
  author = {Oncel, M S and Zedef, V and Mert, S},
  title = {Lead contamination of roadside soils and plants in the highways between Istanbul and Sakarya, NW Turkey},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2004},
  volume = {13},
  number = {12B},
  pages = {1525--1529}
}
Bektas N, Oencel S, Akbulut HY and Dimoglo A (2004), "Removal of boron by electrocoagulation", ENVIRONMENTAL CHEMISTRY LETTERS. Vol. 2(2), pp. 51-54.
BibTeX:
@article{ISI:000239113900001,
  author = {Bektas, Nihal and Oencel, Salim and Akbulut, Hilal Y and Dimoglo, Anatholy},
  title = {Removal of boron by electrocoagulation},
  journal = {ENVIRONMENTAL CHEMISTRY LETTERS},
  year = {2004},
  volume = {2},
  number = {2},
  pages = {51--54},
  doi = {10.1007/s10311-004-0075-6}
}
Farizoglu B, Nuhoglu A, Yildiz E and Keskinler B (2003), "The performance of pumice as a filter bed material under rapid filtration conditions", FILTRATION & SEPARATION. Vol. 40(3), pp. 41+.
Abstract: Deep bed sand filters are used extensively in drinking water and
wastewater treatment. In this study, sand and pumice were used as a
filtration media under rapid filtration conditions and performance
results for both were compared. Turbidity removal performance and head
losses were investigated as functions of filtration rate, bed depth and
particle size. Under the same experimental conditions such as 750 mm bed
depth, 7.64m(3)/m(2).h flow rate and, 0.5-1.0 mm grain size, turbidity
removal rates for sand and pumice were found to be 85-90% and 98-99%,
respectively. Furthermore, the head loss for sand and pumice were found
to be 460 mm and 215 mm, respectively. The results obtained have shown
that pumice has a high potential for use as a filter bed material.
BibTeX:
@article{ISI:000182192100006,
  author = {Farizoglu, B and Nuhoglu, A and Yildiz, E and Keskinler, B},
  title = {The performance of pumice as a filter bed material under rapid filtration conditions},
  journal = {FILTRATION & SEPARATION},
  year = {2003},
  volume = {40},
  number = {3},
  pages = {41+},
  doi = {10.1016/S0015-1882(03)80137-4}
}
Pekdemir T, Keskinler B, Yildiz E and Akay G (2003), "Process intensification in wastewater treatment: ferrous iron removal by a sustainable membrane bioreactor system", JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY. Vol. 78(7), pp. 773-780.
Abstract: Biooxidation of ferrous iron (Fe2+) from strongly acidic industrial
wastewater with a high Fe2+ content by Thiobacillus ferrooxidans in a
packed bed reactor and subsequent removal of ferric iron (Fe3+) by a
crossflow microfiltration (membrane) process have been investigated as
functions of wastewater flowrate (54-672 cm(3) h(-1)), Fe2+
concentration (1.01-8.06 g dm(-3)), and pH (1.5-5.0). A natural
(vegetable) sponge, Luffa cylindrica, was used as support matrix
material. The fastest kinetic performance achieved was about 40 g Fe2+
dm(-3) h(-1) at a true dilution rate of 19 h(-1) corresponding to a
hydraulic retention time of 3.16 min. Steady state conversion was
observed to be about 10% higher at pH 2.3 than that at pH 1.5.
Increasing the flowrate of the inlet wastewater caused a reduction in
conversion rate. The oxidation rate reduced along the reactor height as
the wastewater moved towards the exit at the top but conversion showed
the opposite trend. Increasing Fe2+ concentration up to a critical
point resulted in an increased oxidation rate but beyond the critical
point caused the oxidation rate to decrease. Luffa cylindrica displayed
suitable characteristics for use as a support matrix for formation of a
Thiobacillus ferrooxidans biofilm and showed promising potential as an
ecological and sustainable alternative to existing synthetic support
materials. Membrane separation was shown to be a very effective means
of Fe3+ removal from the wastewater with removal changing from 92% at
pH 2.3 to complete removal at pH 5.0. (C) 2003 Society of Chemical
Industry.
BibTeX:
@article{ISI:000183935500006,
  author = {Pekdemir, T and Keskinler, B and Yildiz, E and Akay, G},
  title = {Process intensification in wastewater treatment: ferrous iron removal by a sustainable membrane bioreactor system},
  journal = {JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY},
  year = {2003},
  volume = {78},
  number = {7},
  pages = {773--780},
  doi = {10.1002/jctb.855}
}
Can OT, Bayramoglu M and Kobya M (2003), "Decolorization of reactive dye solutions by electrocoagulation using aluminum electrodes", INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. Vol. 42(14), pp. 3391-3396.
Abstract: The removal of pollutants from effluents by electrocoagulation has
become an attractive method in recent years. This paper deals with the
batch removal of the reactive textile dye Remazol Red RB 133 from an
aqueous medium by the electrocoagulation method using aluminum
electrodes. The effects of wastewater conductivity, initial pH, current
density, stirring rate, dye concentration, and treatment time on the
decolorization efficiency and energy consumption have been
investigated. Aluminum hydroxypolymeric species formed during an
earlier stage of the operation efficiently remove dye molecules by
precipitation, and in a subsequent stage, AI(OH)3 flocs trap colloidal
precipitates and make solid-liquid separation easier during the
flotation stage. These stages of electrocoagulation must be optimized
to design an economically feasible electrocoagulation process.
BibTeX:
@article{ISI:000183991400024,
  author = {Can, O T and Bayramoglu, M and Kobya, M},
  title = {Decolorization of reactive dye solutions by electrocoagulation using aluminum electrodes},
  journal = {INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH},
  year = {2003},
  volume = {42},
  number = {14},
  pages = {3391--3396},
  doi = {10.1021/ie020951g}
}
Kobya M, Can OT and Bayramoglu M (2003), "Treatment of textile wastewaters by electrocoagulation using iron and aluminum electrodes", JOURNAL OF HAZARDOUS MATERIALS. Vol. 100(1-3), pp. 163-178.
BibTeX:
@article{ISI:000184062800013,
  author = {Kobya, M and Can, O T and Bayramoglu, M},
  title = {Treatment of textile wastewaters by electrocoagulation using iron and aluminum electrodes},
  journal = {JOURNAL OF HAZARDOUS MATERIALS},
  year = {2003},
  volume = {100},
  number = {1-3},
  pages = {163--178},
  doi = {10.1016/S0304-3894(03)00102-X}
}
Basar CA, Karagunduz A, Keskinler B and Cakici A (2003), "Effect of presence of ions on surface characteristics of surfactant modified powdered activated carbon (PAC)", APPLIED SURFACE SCIENCE. Vol. 218(1-4), pp. 169-174.
BibTeX:
@article{ISI:000185491500022,
  author = {Basar, C A and Karagunduz, A and Keskinler, B and Cakici, A},
  title = {Effect of presence of ions on surface characteristics of surfactant modified powdered activated carbon (PAC)},
  journal = {APPLIED SURFACE SCIENCE},
  year = {2003},
  volume = {218},
  number = {1-4},
  pages = {169--174},
  doi = {10.1016/S0169-4332(03)00576-2}
}
Yildiz E, Nuhoglu A, Keskinler B, Akay G and Farizoglu B (2003), "Water softening in a crossflow membrane reactor", DESALINATION. Vol. 159(2), pp. 139-152.
BibTeX:
@article{ISI:000186381000004,
  author = {Yildiz, E and Nuhoglu, A and Keskinler, B and Akay, G and Farizoglu, B},
  title = {Water softening in a crossflow membrane reactor},
  journal = {DESALINATION},
  year = {2003},
  volume = {159},
  number = {2},
  pages = {139--152}
}
Gokcek E and Erturk F (2003), "Determination of CO and HC emissions for gasoline and LPG-fueled highway motor vehicles", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 12(10), pp. 1152-1157.
Abstract: Carbon monoxide (CO), unburned hydrocarbons (HCs), and oxides of
nitrogen (NOx) are the major pollutants of motor vehicle emissions. The
main fuel used in vehicular transportation is gasoline; the use of
liquefied petroleum gas (LPG) is an alternative fuel, which can reduce
the environmental impact on the transportation sector. Today, about
700.000 light-duty vehicles circulate in Istanbul and most of them are
using aftermarket conversion systems. In this study we have surveyed 41
vehicles of that fleet. Twenty-six vehicles with carburettor systems
were chosen, 11 were equipped with fuel injection and the remaining
four vehicles with the newest technology avail-able for air pollution
control. From the study, it can be concluded that due to poor
maintenance, many of the in-use vehicles exceed the environmental
regulation standards required for certification. After the tuning up of
41 vehicles, the emission values were reduced below the environmental
regulation values. In addition, it was found that CO emission of LPG
was 44% less than that of gasoline fuel.
BibTeX:
@article{ISI:000186482100003,
  author = {Gokcek, E and Erturk, F},
  title = {Determination of CO and HC emissions for gasoline and LPG-fueled highway motor vehicles},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2003},
  volume = {12},
  number = {10},
  pages = {1152--1157}
}
Zedef V, Matsuda Y, Tanaka Y, Harada H, Oncel MS, Doyen A, Sogut AR and Sensogut C (2003), "Causes of darkening of the pamukkale travertines, Denizli, south-west Turkey", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 12(11), pp. 1373-1378.
Abstract: Since the beginning of the 1990's, the travertines at Pamukkale,
south-west Turkey, have faced a serious environmental pollution
problem. The travertines were originally snow-white in colour, but this
colour has been turning into pale grey. In addition to other features,
the snow-white colour and the huge mass of rocks on the edge of
Pamukkale plateau make the travertines unique and attractive to
visitors.
Living bacteria exist 1-2 mm beneath the surface of the travertines in
both terrace and water channel types. The thickness of the bacterial
lamina is 1-2 mm in the water channel type, whilst it is approximately
1 cm for other types. Absorbance Spectral (AS) data shows that the
living bacteria are cyanobacteria, which are responsible for the green
colour in certain areas of the travertines.
Our investigations show that the major force responsible for the change
of colour in the area is the increasing level of excess organic matter,
which also causes a shift in the metal content of the travertines.
While the greyish polluted samples have 584 ppm of Total Organic Carbon
(TOC), the unpolluted snow-white samples have only 177 ppm of TOC. On
the other hand, the Al, Fe and Mn contents of the polluted samples are
respectively 144, 62, 6 ppm higher than the unpolluted samples.
As the TOC is the main cause of the pollution, decreasing the organic
matter in the pools would be the first step to protecting the area.
This requires limiting, or even banning, people who enter the pools for
swimming. Sources of Al, Fe, Mn and other hazardous metals should be
reduced in the region.
BibTeX:
@article{ISI:000186886900014,
  author = {Zedef, V and Matsuda, Y and Tanaka, Y and Harada, H and Oncel, M S and Doyen, A and Sogut, A R and Sensogut, C},
  title = {Causes of darkening of the pamukkale travertines, Denizli, south-west Turkey},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2003},
  volume = {12},
  number = {11},
  pages = {1373--1378}
}
Yildirim Y, Demircioglu N, Kobya M and Bayramoglu M (2002), "A mathematical modeling of sulphur dioxide pollution in Erzurum City", ENVIRONMENTAL POLLUTION. Vol. 118(3), pp. 411-417.
Abstract: A non-linear simple air-quality model was developed by applying the
continuity equation for the air control volume over Erzurum city center
and tested using daily average values Of SO2 and meteorological data
obtained during the winter seasons in Erzurum, Turkey from 1994 to 1998.
Model parameters are estimated by non-linear regression analysis.
Agreement between model predictions and measured data was found very
satisfactory with standard deviations less than 20 mug/m(3). (C) 2002
Elsevier Science Ltd. All rights reserved.
BibTeX:
@article{ISI:000175229700015,
  author = {Yildirim, Y and Demircioglu, N and Kobya, M and Bayramoglu, M},
  title = {A mathematical modeling of sulphur dioxide pollution in Erzurum City},
  journal = {ENVIRONMENTAL POLLUTION},
  year = {2002},
  volume = {118},
  number = {3},
  pages = {411--417},
  doi = {10.1016/S0269-7491(01)00291-3}
}
Demirbas E, Kobya M, Oncel S and Sencan S (2002), "Removal of Ni(II) from aqueous solution by adsorption onto hazelnut shell activated carbon: equilibrium studies", BIORESOURCE TECHNOLOGY. Vol. 84(3), pp. 291-293.
BibTeX:
@article{ISI:000176419800015,
  author = {Demirbas, E and Kobya, M and Oncel, S and Sencan, S},
  title = {Removal of Ni(II) from aqueous solution by adsorption onto hazelnut shell activated carbon: equilibrium studies},
  journal = {BIORESOURCE TECHNOLOGY},
  year = {2002},
  volume = {84},
  number = {3},
  pages = {291--293}
}
Karpuzcu M, Dimogio A and Akbulut HY (2002), "Purification of agro-industrial wastewater from the grease-protein mixture by means of electroflotocoagulation", WATER SCIENCE AND TECHNOLOGY. Vol. 45(12), pp. 233-240.
BibTeX:
@article{ISI:000177805700029,
  author = {Karpuzcu, M and Dimogio, A and Akbulut, H Y},
  title = {Purification of agro-industrial wastewater from the grease-protein mixture by means of electroflotocoagulation},
  journal = {WATER SCIENCE AND TECHNOLOGY},
  year = {2002},
  volume = {45},
  number = {12},
  pages = {233--240}
}
Kobya M, Demirbas E, Oncel MS and Sencan S (2002), "Adsorption kinetic models applied to nickel ions on hazelnut shell activated carbons", ADSORPTION SCIENCE & TECHNOLOGY. Vol. 20(2), pp. 179-188.
BibTeX:
@article{ISI:000178022900007,
  author = {Kobya, M and Demirbas, E and Oncel, M S and Sencan, S},
  title = {Adsorption kinetic models applied to nickel ions on hazelnut shell activated carbons},
  journal = {ADSORPTION SCIENCE & TECHNOLOGY},
  year = {2002},
  volume = {20},
  number = {2},
  pages = {179--188}
}
Akkoyunlu A, Karpuzcu M, Erturk F and Bayhan H (2002), "The pollution status and environmental effects of Izmit bay (Marmara Sea, Turkey) crossing via tube tunnel or bridge", FRESENIUS ENVIRONMENTAL BULLETIN. Vol. 11(11), pp. 957-964.
Abstract: In Turkey, as a developing country, the environmental pollution
problems have particularly increased since 1960, due to the rapid
growth of industry and widespread increase of population in Marmara
region, specifically in the Izmit bay. Since the 1960s, more than 250
large industrial plants have been built in the area surrounding the
bay. In addition to the land and atmosphere, the bay is receiving the
majority of these wastes. The pollution of Izmit bay has caused great
concern to local and national authorities.
In this study, environmental impact assessments of the two
alternatives, crossing the bay via tunnel or bridge, have been
investigated. Measurement of oceanographic parameters shows the
presence of a two-layer water body with seasonal variation in the bay.
At project route surface concentrations of dissolved oxygen were found
to be at their saturation values, whereas they drop down to 0.7 mg/l at
the bottom. Polychaeta, species in the deep sludge characterized a
retarding ecological system. The fauna species, observed in the benthic
structure, would again be recovered after development the crossing via
tube or bridge. The dredged material obtained from the bay crossing
route can be used in sanitary land filling sites of Gebze. The most
inconvenient conditions in terms of air pollution seemed to be caused
by tube crossing the bay.
BibTeX:
@article{ISI:000180122100002,
  author = {Akkoyunlu, A and Karpuzcu, M and Erturk, F and Bayhan, H},
  title = {The pollution status and environmental effects of Izmit bay (Marmara Sea, Turkey) crossing via tube tunnel or bridge},
  journal = {FRESENIUS ENVIRONMENTAL BULLETIN},
  year = {2002},
  volume = {11},
  number = {11},
  pages = {957--964}
}
Yatmaz HC, Wallis C and Howarth CR (2001), "The spinning disc reactor - studies on a novel TiO2 photocatalytic reactor", CHEMOSPHERE. Vol. 42(4), pp. 397-403.
Abstract: A new type of photocatalytic reactor, the spinning disc reactor (SDR),
was used to degrade aqueous solutions of 4-chlorophenol and salicylic
acid. The efficiency of the photocatalytic process depends on the type
of UV source used. Lamps supplying shorter wavelength UV radiation are
more efficient than those whose emissions lay mainly in the near UV
region. The method used to coat the disc of the SDR does not meet its
operational requirements. The characteristics of the turbulent liquid
films produced in the SDR reduce the influence of mass transfer over the
overall photocatalytic process. (C) 2000 Elsevier Science Ltd. All
rights reserved.
BibTeX:
@article{ISI:000165351800009,
  author = {Yatmaz, H C and Wallis, C and Howarth, C R},
  title = {The spinning disc reactor - studies on a novel TiO2 photocatalytic reactor},
  journal = {CHEMOSPHERE},
  year = {2001},
  volume = {42},
  number = {4},
  pages = {397--403},
  doi = {10.1016/S0045-6535(00)00088-6}
}
Kirisits MJ, Snoeyink VL, Inan H, Chee-Sanford JC, Raskin L and Brown JC (2001), "Water quality factors affecting bromate reduction in biologically active carbon filters", WATER RESEARCH., mar, 2001. Vol. 35(4), pp. 891-900.
BibTeX:
@article{ISI:000167033400005,
  author = {Kirisits, M J and Snoeyink, V L and Inan, H and Chee-Sanford, J C and Raskin, L and Brown, J C},
  title = {Water quality factors affecting bromate reduction in biologically active carbon filters},
  journal = {WATER RESEARCH},
  year = {2001},
  volume = {35},
  number = {4},
  pages = {891--900}
}
Dogan O, Simsek O, Ertugrul M and Kobya M (2001), "X-ray fluorescence spectrometry analysis of trace elements in fly ash samples of Yenikoy Thermal Power Plants", INSTRUMENTATION SCIENCE & TECHNOLOGY. Vol. 29(5), pp. 433-439.
Abstract: Fly ash samples collected by means of an electrostatic precipitator from
the lignite-fired Yenikoy Power Plants located in Turkey were analysed
using an x-ray fluorescence (XRF) technique. Five trace elements, namely
Nd, Ba, Mo, Sr, and As, were quantified using XRF The concentrations of
these elements can be helpful in developing an environmental pollution
abatement approach for various applications of fly ash, such as cement
manufacture, wastewater treatment, light-weight contraction aggregate,
ceramic production, and as a secondary source in recovery of valuable
elements.
BibTeX:
@article{ISI:000171932000008,
  author = {Dogan, O and Simsek, O and Ertugrul, M and Kobya, M},
  title = {X-ray fluorescence spectrometry analysis of trace elements in fly ash samples of Yenikoy Thermal Power Plants},
  journal = {INSTRUMENTATION SCIENCE & TECHNOLOGY},
  year = {2001},
  volume = {29},
  number = {5},
  pages = {433--439},
  doi = {10.1081/CI-100107235}
}
Celen I and Turker M (2001), "Recovery of ammonia as struvite from anaerobic digester effluents", ENVIRONMENTAL TECHNOLOGY. Vol. 22(11), pp. 1263-1272.
BibTeX:
@article{ISI:000173007400003,
  author = {Celen, I and Turker, M},
  title = {Recovery of ammonia as struvite from anaerobic digester effluents},
  journal = {ENVIRONMENTAL TECHNOLOGY},
  year = {2001},
  volume = {22},
  number = {11},
  pages = {1263--1272}
}
Demircioglu N, Levent M, Kobya M and Topcu N (2000), "Kinetic analysis of coupled transport of nitrite ions through liquid membranes at different temperatures", FILTRATION & SEPARATION. Vol. 37(3), pp. 51-56.
Abstract: Non-steady state kinetics of the coupled transport of nitrite (NO2-)
ions through liquid membranes (n-hexane 85% + chloroform 15%)
containing tetraoctylammonium chloride as a carrier was examined at
temperatures ranging from 273-308 degrees K. In this study, the,
influence of temperature on the kinetic parameters (k(1d), k(2m), k(2a),
t(max), R-m(max), J(d)(max), J(a)(max)) was investigated. The membrane
entrance (k(1d)) and exit rates (k(2m), k(2a)) were increased with
temperature. For maximum membranes entrance and exit fluxes, the
activation energies were calculated from the slopes of the two linear
relationships: E-ad = 6.62 kcal/mol and E-aa = 6.63 kcal/mol,
respectively. The values of the calculated activation energy indicate
that the process is diffusionally controlled.
BibTeX:
@article{ISI:000086488300007,
  author = {Demircioglu, N and Levent, M and Kobya, M and Topcu, N},
  title = {Kinetic analysis of coupled transport of nitrite ions through liquid membranes at different temperatures},
  journal = {FILTRATION & SEPARATION},
  year = {2000},
  volume = {37},
  number = {3},
  pages = {51--56},
  doi = {10.1016/S0015-1882(00)88505-5}
}
Demircioglu N, Levent M, Kobya M and Topcu N (2000), "The effects of stirring speed on coupled transport of nitrite ions through liquid membranes", CHEMICAL AND BIOCHEMICAL ENGINEERING QUARTERLY. Vol. 14(4), pp. 109-116.
Abstract: In this study, the appeals of stirring speed on coupled transport of
nitrite ions through liquid membranes has been investigated at various
stirring speeds in the range of 100-250 rpm. Coupled transport of
nitrite ions through liquid membranes (cp = 85 % hexane + phi = 15 %
trichlorometane) containing tetraoctyl ammonium chloride (TOACl) as a
carrier, was examined. For the diffusion of the nitrite ion-carrier
complex at various stirring speeds through the narrow boundary layers at
the interface of the membrane, the variable membrane entrance (k(1d) and
exit rates (k(2m) and k(2a)) are the rate determining steps. The
activation energies of membrane entrance and exit permeate rates for
nitrite ions are E-am = 1.58 and E-aa = 1.583 kJ mol(-1), respectively.
From these experimental results, it was concluded that the reaction was
diffusion controlled. The membrane was stable during the transport
experiments (no leakage of carrier and carrier-nitrite ion complexes to
both aqueous phases and also there was no supplementary water
penetration into the membrane was observed). This favours the
interfacial character of nitrite ion-carrier complexion reaction.
BibTeX:
@article{ISI:000166433700001,
  author = {Demircioglu, N and Levent, M and Kobya, M and Topcu, N},
  title = {The effects of stirring speed on coupled transport of nitrite ions through liquid membranes},
  journal = {CHEMICAL AND BIOCHEMICAL ENGINEERING QUARTERLY},
  year = {2000},
  volume = {14},
  number = {4},
  pages = {109--116}
}