Department of Environmental Engineering, Article

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Recent Submissions

Biohydrogen production from cattle manure and its mixtures with renewable feedstock by hyperthermophilic Caldicellulosiruptor bescii Yılmazel Tokel, Yasemin Dilşad; Duran, Metin (Elsevier BV, 2021-04-10) © 2021 Elsevier LtdFermentation of cattle manure as the sole carbon source and along with the mixtures of switchgrass and wastewater biosolids by hyperthermophilic cellulolytic bacterium, Caldicellulosiruptor bescii was as...
intI1 Type Mobile Genetic Elements Co-selected Antibiotic-Resistant Genes in Untreated Hospital Wastewaters Kayali, Osman; İçgen, Bülent (2021-01-01) Dissemination of antibiotic-resistant genes (ARGs) from hospital wastewaters (HWWs) is facilitated by the horizontal gene transfer (HGT) and involves association of ARGs with mobile genetic elements (MGEs). In our previous...
Characterization and source apportionment of carbonaceous aerosols in fine particles at urban and suburban atmospheres of Ankara, Turkey Koçak, Ebru; ASLAN KILAVUZ, SEDA; ÖZTÜRK, FATMA; İmamoğlu, İpek; Tuncel, Süleyman Gürdal (2021-01-01) In order to find the spatial distribution characteristics of elemental (EC) and organic (OC) carbon in fine particles, daily PM2.5 aerosol samples were collected at two different stations, between July 2014 and September 2...
Development of a fate and transport model for biodegradation of PBDE congeners in sediments Karakas, Filiz; Aksoy, Ayşegül; İmamoğlu, İpek (Elsevier BV, 2020-11-01) Polybrominated diphenyl ethers (PBDEs) are a family where each congener possesses different physicochemical properties, persistence and/or toxicity. Biodegradation can selectively change the abundance of congeners. These w...
Development of a radioecological model for accidental release of radionuclides Unver, O.; Kocar, C.; Tuncel, G. (Carl Hanser Verlag, 2020-10-01) A dynamic radioecological model was developed to estimate radiation doses and stochastic health risks due to atmospheric releases in case of a nuclear reactor accident. Activities in some foodstuffs, feedstuffs and grass, ...
Sensitivity and uncertainty analysis for a radioecological model Unver, O.; Kocar, C.; Tuncel, G. (Carl Hanser Verlag, 2020-10-01) Uncertainty and sensitivity analysis were conducted for a radioecological model which was developed and applied for severe accident scenario for Akkuyu NPP in Turkey. Uncertainty was investigated in the doses and activity ...
A strategy for the implementation of water-quality-based discharge limits for the regulation of hazardous substances GÜRSOY HAKSEVENLER, BETÜL HANDE; Atasoy-Aytis, Elif; Dilaver, Mehmet; YALÇINKAYA, SEDAT; Findik-Cinar, Nur; KÜÇÜK, ELİF; PİLEVNELİ, TOLGA; Koc-Orhon, Aybala; Siltu, Esra; Gucver, Sibel Mine; Karaaslan, Yakup; Yetiş, Ülkü (Springer Science and Business Media LLC, 2020-09-01) Many developing countries apply technology-based discharge standards that set quantitative limits on pollutant discharges. These standards do not inherently consider ambient constraints and, therefore, cannot guarantee to ...
Performance of ozone and peroxone on the removal of endocrine disrupting chemicals (EDCs) coupled with cost analysis Ölmez Hancı, Tuğba; Dogruel, S.; Emek, A. D. Allar; Yilmazer, C. Eropak; Cinar, S.; Kiraz, O.; Citil, E.; Orhon, A. Koc; Siltu, E.; Gucver, S. M.; Ozgun, O. Karahan; Tanık, Ayşe Gül; Yetiş, Ülkü (IWA Publishing, 2020-08-01) Micropollutants such as endocrine disruptors are one of the most important groups of chemicals polluting water resources. Conventional treatment systems may not be effective for the removal of endocrine disrupting chemical...
Integrated solid waste management strategy of a large campus: A comprehensive study on METU campus, Turkey Bahcelioglu, Ecem; Bugdayci, E. Selin; Dogan, Nazli B.; Simsek, Naz; Kaya, Sinan O.; Alp, Emre (Elsevier BV, 2020-08-01) A significant amount of solid waste generation from various streams become inevitable for large campuses due to their large population and variety of activities taking place on the campus. Therefore, it is a challenge to d...
Microbially mediated kinetic sulfur isotope fractionation: reactive transport modeling benchmark Cheng, Yiwei; Arora, Bhavna; Şengör, Sema Sevinç; Druhan, Jennifer L.; Wanner, Christoph; van Breukelen, Boris M.; Steefel, Carl (Springer Science and Business Media LLC, 2020-08-01) Microbially mediated sulfate reduction is a ubiquitous process in many subsurface systems. Isotopic fractionation is characteristic of this anaerobic process, since sulfate-reducing bacteria (SRB) favor the reduction of th...
Biogeochemical cycling of heavy metals in lake sediments: impact of multispecies diffusion and electrostatic effects Li, Jianing; Sengor, S. Sevinc (Springer Science and Business Media LLC, 2020-08-01) Fate and transport of heavy metals is controlled by the biogeochemical processes in the environment. Reactive transport modeling is particularly important for capturing the complex interplay between the microbial community...
Removal of chloridazon pesticide from waters by Fenton and photo-Fenton processes Ulu, Hatice Bike; DEĞERMENCİ, NEJDET; Dilek, Filiz Bengü (2020-08-01) Chloridazon (CLZ), also named as Pyrazon and classified as organochlorine pesticides, is widely used during sugar beets cultivation. CLZ being a pesticide with high solubility in water is likely to end up in surface and gr...
Removal of antibiotic resistance genes in various water resources recovery facilities Kucukunsal, Serkan; İçgen, Bülent (Wiley, 2020-06-01) Water resources recovery facilities (WWTPs) are hotspots for antibiotic resistance genes (ARGs) and pose a significant threat to environments. Therefore, ARG removal efficiencies of WWTPs are of great importance. In this s...
Monorhamnolipids Predominance among Kerosene Degraders Aydin, Dilan Camille; İçgen, Bülent (American Society of Civil Engineers (ASCE), 2020-06-01) Rhamnolipids, produced during biodegradation, enhance the removal of hydrocarbons by decreasing the surface tension and increasing the bioavailability. Unlike the synthetic surfactants, rhamnolipids are very promising for ...
Imidacloprid elimination by O-3 and O-3/UV: kinetics study, matrix effect, and mechanism insight Baghirzade, Busra Sonmez; Yetiş, Ülkü; Dilek, Filiz Bengü (Springer Science and Business Media LLC, 2020-05-25) The removal of imidacloprid (IMI) from water by ozonation (O-3) and photo-ozonation (O-3/UV) was comparatively studied, paying particular attention to the kinetics, matrix effect, and mechanistic aspects of the processes. ...
Effects of anaerobic digestion enhanced by ultrasound pretreatment on the fuel properties of municipal sludge Çelebi, Emrehan Berkay; Aksoy, Ayşegül; Sanin, Faika Dilek (Springer Science and Business Media LLC, 2020-05-01) In this study, effects of ultrasound pretreatment on combustion characteristics and elemental composition of municipal sludge were examined for energy-based evaluation of sludge pretreatment. Waste activated sludge (WAS) f...
Determination of groundwater threshold values: A methodological approach Bulut, Onur F.; Duru, Burcu; Cakmak, Ozgur; Gunhan, Ozgur; Dilek, Filiz Bengü; Yetiş, Ülkü (Elsevier BV, 2020-04-20) This article is concerned with the establishment of natural background levels and threshold values for naturally-occurring parameters in groundwaters in the absence of relevant and accurate long-term spatial data. A new ap...
Contrasting effects of biochar and hydrothermally treated coal gangue on leachability, bioavailability, speciation and accumulation of heavy metals by rapeseed in copper mine tailings Munir, Mehr Ahmed Mujtaba; Liu, Guijian; Yousaf, Balal; Mian, Md Manik; Ali, Muhammad Ubaid; Ahmed, Rafay; Cheema, Ayesha Imtiyaz; Naushad, Mu (Elsevier BV, 2020-03-15) The purpose of this research was to examine the influence of hydrothermally treated coal gangue (HTCG) with and without biochar (BC) on the leaching, bioavailability, and redistribution of chemical fractions of heavy metal...
Untreated HWWs Emerged as Hotpots for ARGs Kayali, Osman; İçgen, Bülent (Springer Science and Business Media LLC, 2020-03-01) Hospital wastewaters (HWWs) are reported to be hotspots for antibiotics and antibiotic-resistant bacteria. However, limited information involves the impact of these effluents on dissemination of antibiotic-resistance genes...
Sulfate removal from drinking water by commercially available nanofiltration membranes: A parametric study Karabacak, Aslı; Dilek, Filiz Bengü; Yılmaz, Levent; KİTİŞ, Mehmet; Yetiş, Ülkü (2020-01-01) © 2020 Desalination Publications. All rights reserved.The efficacy of nanofiltration (NF) in removing sulfate from a high sulfate content (370–460 mg/L) surface water was investigated. NF tests were carried out using a lab...