title: Levels and sources of polychlorinated biphenyls in Ankara creek sediments, Turkey.
abstract: The spatial distribution, degree of pollution and major sources of polychlorinated biphenyls (PCBs) were evaluated in surficial sediments of Ankara Creek, located in the capital of Turkey and serving as one of the tributaries in the third largest watershed in Turkey. Sediment ΣPCB concentrations analyzed on Aroclor and congener basis (seven indicator congeners) range from 5.5 to 777.6 ng g(-1) and 3.7 to 743.3 ng g(-1) dw as Aroclor and congener based concentrations, respectively. High concentrations of ΣPCBs were observed in the samples located at the downstream sections of the Creek, after discharge from Ankara municipal wastewater treatment plant. Using a chemical mass balance receptor model (CMB), major sources of PCBs affecting the sediments were investigated. The CMB model identified Aroclor 1254 and 1260 to be the major PCB sources affecting sediments. The potential sources for the PCBs were briefly discussed in terms of their use in various industrial applications.
authors: Department of Environmental Engineering, Middle East Technical University, Ankara, Turkey.
authors: Nazan Akduman
authors: NA
authors: Ozyürek
authors: Kadir
authors: K
authors: Gedik
authors: Esra
authors: E
authors: Siltu
authors: Ipek
authors: I
authors: Imamoğlu
mesh_terms: D001140:Aroclors; D002849:Chromatography, Gas; D004785:Environmental Pollutants / Q000032:analysis*; D019015:Geologic Sediments / Q000032:analysis*; D008956:Models, Chemical; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D045483:Rivers / Q000737:chemistry*; D014421:Turkey
chemical_list: D001140:Aroclors; D004785:Environmental Pollutants; D011078:Polychlorinated Biphenyls