title: Distribution of persistent organochlorine residues in sediments from the Songhuajiang River, Northeast China.
abstract: Organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in surface sediments from 10 sampling sites of the Songhuajiang River were analyzed to evaluate their potential pollution and hazards. Gas chromatography equipped with a 63Ni electron capture detector (GC-ECD) and gas chromatography/mass spectrometer (GC/MS) methods were used, respectively. The total concentrations of 13 OCPs varied from 4.26 to 18.45 ng g(-1). Sigma HCH (alpha-HCH, beta-HCH, delta-HCH, gamma-HCH), sigma DDT (p, p'-DDE, p, p'-DDD, o,p'-DDT, p, p'-DDT) and sigma Cyclodiene (Heptachlor, Aldrin, Heptachlor epoxide, Dieldrin, Endrin) ranged from 2.42 to 7.95, 0.14 to 5.12, 0.55 to 6.01 ng g(-1), respectively. The most dominant pollutant among the OCPs was gamma-HCH with the concentration of 3.4 (0.77 to 7.21) ng g(-1). Total PCB concentrations ranged between 0.59 and 15.93 ng g(-1). Low chlorinated biphenyls (tri- and tetra-) dominated in total PCBs. Positive correlations were observed between the EDDT, sigma Cyclodiene, sigma OCP or sigma PCB and TOC of the sediments (P < 0.05, n = 10). No obvious correlation was observed between the sigma HCH and the TOC of the sediments.
authors.affiliation: State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, P R China.
authors.forename: M
authors.initials: M
authors.lastname: He
authors.forename: H
authors.initials: H
authors.lastname: Wang
authors.forename: C
authors.initials: C
authors.lastname: Lin
authors.forename: X
authors.initials: X
authors.lastname: Quan
authors.forename: W
authors.initials: W
authors.lastname: Guo
authors.forename: Z
authors.initials: Z
authors.lastname: Yang
mesh_terms: D002681:China; D019015:Geologic Sediments / Q000032:analysis*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis* / Q000633:toxicity; D010575:Pesticides / Q000032:analysis* / Q000633:toxicity; D011078:Polychlorinated Biphenyls / Q000032:analysis* / Q000633:toxicity; D045483:Rivers
chemical_list: D006843:Hydrocarbons, Chlorinated; D010575:Pesticides; D011078:Polychlorinated Biphenyls