title: Contamination and congener profiles of polychlorinated biphenyls from different agricultural top soils in a county of the Tailake Region, China.
abstract: Hundred topsoil (0-20 cm) samples under different land use types were collected from a county in the Tailake Region, China and analyzed for 18 polychlorinated biphenyls (PCBs) including five dioxin-like PCBs. The mean concentration of total PCBs (SigmaPCBs) for all sites was 1.071 microg kg(-1) dry weight (dw) with a range of 0.016 microg kg(-1) to 4.050 microg kg(-1), and the concentration of total Dioxin-like PCBs (SigmaDioxin-like PCBs) was 0.352 microg kg(-1) about 33% of SigmaPCBs. The concentration of SigmaPCBs in paddy field (PF) soils with a mean of 1.63 microg kg(-1) was higher than that in vegetable soil with a mean of 0.882 microg kg(-1), but the concentration of Dioxin-like PCBs in PF soil was lower than that in commercial vegetable production soil. The concentration of heavier weighted molecular PCB congeners (> or = penta-PCBs) in vegetable soil accounted for 98% of SigmaPCBs, while that in Paddy field soil for 65% of SigmaPCBs.
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China.
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.forename: Qiong
authors.initials: Q
authors.lastname: An
authors.forename: Yuan-Hua
authors.initials: YH
authors.lastname: Dong
authors.forename: De-Chen
authors.initials: DC
authors.lastname: Li
authors.forename: B
authors.initials: B
authors.lastname: Velde
mesh_terms: D000383:Agriculture; D002681:China; D018556:Crops, Agricultural; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis
chemical_list: D012987:Soil; D012989:Soil Pollutants; D011078:Polychlorinated Biphenyls