白洋淀有机氯农药赋存水平及污染成因

 有机氯农药（OCPs）是一类环境激素，对生物体产生遗传毒性、内分泌毒性等效应，对人类健康产生威胁。回顾了20世纪50年代至2017年白洋淀水体、沉积物及水生生物的OCPs多介质赋存水平及来源。分析表明，白洋淀区表层水OCPs浓度为10.80~261.90 ng/L，沉积物中OCPs含量为73.95~269.80 ng/g。OCPs污染以六氯环己烷（HCHs）和滴滴涕（DDTs）为主，其他OCPs检出率很低，并未呈面源污染特征。淀区的OCPs污染与河流（府河）的外源输入关系密切，也与生态补水频繁、周边农业种植结构变化及自身生态环境脆弱等因素相关。

Occurrence of organochlorine pesticide in Baiyangdian Lake and the cause of pollution

Organochlorine pesticides (OCPs) are a typical kind of endocrine disrupting chemicals, with genotoxicity and endocrine toxicity effects, which is a great threat to human health. This paper studies the concentration and the sources of OCPs in surface water, sediments and aquatic organisms in Baiyangdian Lake during the 1950s and in 2017. It is shown that the concentration of OCPs in the Baiyangdian area is between 10.80 and 261.90 ng/L, and the corresponding concentration in sediments is from 73.95 to 269.80 ng/g. HCHs and DDTs are widely detected, while other OCPs are quite few. The pollution of OCPs in Baiyangdian area does not see the characteristics of the nonpoint source pollution, and the pollution is closely related to the external input of the river (the Fuhe river). Moreover, the frequent ecological water supplement, the development of the agricultural planting structure and the fragile ecological environment also affect the OCPs pollution.