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    Investigation of Hazard Potential of Oil Industry Wastes and Products for Better Management Practices
    (Asce-Amer Soc Civil Engineers, 2018) Bolat, Dilek; Can-Guven, Emine; Gedik, Kadir; Kurt Karakuş, Perihan Binnur
    Polychlorinated biphenyl (PCB), metal, and chlorine contents of samplesincluding waste mineral oil, engine oil, edible oil, oily waste (industrial/domestic), and number 10 lube (NTL)were investigated to evaluate possible hazards to the environment. Analyses were conducted using Turkish and United States Environmental Protection Agency standards. The results showed an uneven distribution of pollutants among all type of samples or samples that were collected from the same area at different time intervals. Although PCB usage was banned in Turkey many years ago, indicator PCB congeners were observed in NTL samples that were predominantly used as alternative fuel in heavy duty diesel engines. Waste oil and oily waste samples should be recycled as raw materials and/or recovered as an energy source, but the findings of this study yields disposal as a hazardous material due to high metal (Cr) content. The overall results of the study show that uncontrolled combustion of waste oil and oily wastes may cause environmental problems, and use of these wastes and products should be controlled and managed by strict precautions.
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    Organochlorine pesticides and polychlorinated biphenyls from a greenhouse area on the Mediterranean coast of Turkey: Distribution, air-soil exchange, enantiomeric signature, and source implications
    (Dokuz Eylül Üniversitesi, 2021) Can-Guven, Emine; Gedik, Kadir; Kurt Karakuş, Perihan Binnur
    Levels, seasonal variation, and air-soil exchange of 22 organochlorine pesticides (OCPs) and 15 polychlorinated biphenyls (PCBs) were determined in addition to the first insight into the enantiomeric signatures of chiral OCPs in an agricultural region of Turkey. A total of 47 polyurethane foam disk passive air samples and 34 surface/indepth soil samples were analyzed. Sigma OCP and Sigma PCB levels in air samples were 32.6-741 pg/m(3) and nd-2764 pg/m(3), while they were nd-28.1 ng/g dw and nd-0.302 ng/g dw in soil samples, respectively. Dichlorodiphenyl-trichloroethane (DDT) and its metabolites and endosulfan isomers were the most prevalent chemicals along with the light-weighted PCB congeners. During this study, lower or similar contamination levels were observed compared to global studies conducted in agricultural regions. The enantiomer fractions of o,p'-DDT in air samples might be due to re-volatilization of equally depleted enantiomers or fresh input of racemic o,p'-DDT to the air. The fugacity fractions showed that net deposition is the dominant mechanism.