【摘要】 对2011年5月采自大凌河河口地区30个表层水体中22种有机氯农药(OCPs)的污染现状及组成特征进行了测定分析。结果表明,水体中OCPs浓度范围在14.78～180.64 ng/L,平均值为50.45 ng/L,其中以六六六(HCHs)和滴滴涕(DDTs)为主。HCHs浓度范围12.66～147.89 ng/L,平均值32.89 ng/L;DDTs浓度范围1.40～29.10 ng/L,平均值14.48ng/L;水体中HCHs和DDTs含量均未超出国家地表水环境质量标准。大凌河河口地区表层水体中有机氯农药浓度基本上显现出从大凌河流域流经河口地区向近海海域逐渐降低的趋势。水体中有机氯农药污染除来源于历史上工业HCHs和工业DDTs使用外,近期有新的农药污染(林丹和三氯杀螨醇)输入。更多还原

【Abstract】 Thirty surface water samples were analyzed for 22 organochlorine pesticides(OCPs),in order to provide extensive information of distribution and composition of these OCP compounds in Dalinghe River Estuary area,China.The results showed that concentration of OCPs(in ng/L) was range from 14.78 to 180.64 with the mean of 50.45.Hexachlorocyclohexanes(HCHs) and dichlorodiphenyltrichloroethanes(DDTs) were the mass and most frequently detected contaminants with concentrations(in ng/L) from 12.66 to 147.89(mean:32.89) and from 1.40 to 29.10(mean:14.48),respectively.The concentrations of HCHs and DDTs were both lower than the limited value defined by Environmental Quality Standards for Surface Water in China.The decreasing trends of HCHs and DDTs concentrations from river area to estuary and coastal region were observed.Compositional analysis of HCHs and DDTs indicated that new input were lindane and dicofol mainly due to agricultural activities.更多还原