title: Evaluation of background soil and air polychlorinated biphenyl (PCB) concentrations on a hill at the outskirts of a metropolitan city.
abstract: Air and soil sampling was conducted inside a forested area for 22 months. The sampling location is situated to the north of a metropolitan city. Average atmospheric gas and particle concentrations were found to be 180 and 28 pg m(-3) respectively, while that of soil phase was detected to be 3.2 ng g(-1) on dry matter, The congener pairs of PCB#4-10 had the highest contribution to each medium. TEQ concentration was 0.10 pg m(-3), 0.07 pg m(-3), 21.92 pg g(-1), for gas, particle and soil phases, respectively. PCB#126 and PCB#169 contributed to over 99% of the entire TEQ concentrations for each medium. Local sources were investigated by conditional probability function (CPF) and soil/air fugacity. Landfilling area and medical waste incinerator, located to the 8 km northeast, contributed to ambient concentrations, especially in terms of dioxin-like congeners. The industrial settlement (called Dilovasi being to the east southeast of 60 km distant) contributed from southeast direction. Further sources were identified by potential source contribution function (PSCF). Sources at close proximity had high contribution. Air mass transportation from Aliaga industrial region (being to the southwest of 300 km distant) moderately contributed to ambient concentrations. Low molecular weight congeners were released from soil body. 5-CBs and 6-CBs were close to equilibrium state between soil/air interfaces. PCB#171 was close to equilibrium and PCB#180 was likely to evaporate from soil, which constitute 7-CBs. PCB#199, representing 8-CBs deposited to soil. 9-CB (PCB#207) was in equilibrium between soil and air phases.
authors.affiliation: Yildiz Technical University, Civil Engineering Faculty, Environmental Engineering Department, 34220, Davutpaşa-Esenler/Istanbul, Turkey. Electronic address: skuzu@yildiz.edu.tr.
authors.forename: S Levent
authors.initials: SL
authors.lastname: Kuzu
authors.affiliation: Yildiz Technical University, Civil Engineering Faculty, Environmental Engineering Department, 34220, Davutpaşa-Esenler/Istanbul, Turkey.
authors.forename: Arslan
authors.initials: A
authors.lastname: Saral
authors.affiliation: Bartin University, Engineering Faculty, Environmental Engineering Department, Kutlubey/Yazicilar Campus, 74100, Bartin, Turkey.
authors.forename: Gülten
authors.initials: G
authors.lastname: Güneş
authors.affiliation: Yildiz Technical University, Civil Engineering Faculty, Environmental Engineering Department, 34220, Davutpaşa-Esenler/Istanbul, Turkey.
authors.forename: Aykut
authors.initials: A
authors.lastname: Karadeniz
mesh_terms: D000388:Air / Q000032:analysis*; D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry; D002947:Cities; D004784:Environmental Monitoring; D017745:Incineration; D007221:Industry; D011078:Polychlorinated Biphenyls / Q000032:analysis* / Q000737:chemistry; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis* / Q000737:chemistry
chemical_list: D000393:Air Pollutants; D012987:Soil; D012989:Soil Pollutants; D011078:Polychlorinated Biphenyls
keywords: Background levels; CPF; PCBs; PSCF; Soil-air fugacity