title: [Distribution characteristics of organochlorine pesticides in river surface sediments in Song-Liao watershed].
abstract: With gas chromatography-electron capture detector (GC-ECD), this paper analyzed 13 kinds of organochlorinae pesticides (OCP) in surface sediments collected from 22 sites of Song-Liao water system. The results showed that the total concentration of OCP varied from 3.06 to 23.24 ng x g(-1) in Daliao River system and from 4.26 to 18.45 ng x g(-1) in Songhuajiang River system. The most dominant OCP pollutant in the sediments in Song-Liao Watershed was HCH, but there existed different pollution tendency in the two subsystems. In Songhuajiang River, there were also relatively high concentrations of DDT. High concentration gamma-HCH was observed among the isomers of HCH in the whole watershed, which exceeded the initial affecting concentration and could potentially do toxic effect on the water creatures.
authors: State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China. haozheng_bnu@hotmail.com
authors: Hao-Zheng
authors: HZ
authors: Wang
authors: Meng-Chang
authors: MC
authors: He
authors: Chun-Ye
authors: CY
authors: Lin
authors: Xiang-Chun
authors: XC
authors: Quan
authors: Wei
authors: W
authors: Guo
mesh_terms: D002681:China; D003634:DDT / Q000032:analysis; D004784:Environmental Monitoring / Q000379:methods; D019015:Geologic Sediments / Q000032:analysis*; D001556:Hexachlorocyclohexane / Q000032:analysis; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D010575:Pesticides / Q000032:analysis*; D045483:Rivers; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D006843:Hydrocarbons, Chlorinated; D010575:Pesticides; D014874:Water Pollutants, Chemical; D001556:Hexachlorocyclohexane; D003634:DDT