黄浦江水源地多介质中六六六、滴滴涕残留特征分析

Pollution Characteristics of HCHs and DDTs in Drinking Water Sources of Huangpu River

饮用水是六六六(HCHs)、滴滴涕(DDTs)类污染物进入人体的主要途径之一。通过对上海市主要饮用水源地黄浦江上游干流河段表层水体、表层沉积物及支流表层水体及其周边表层土壤中有机氯类内分泌干扰物的含量检测,对该两类污染物残留特征进行分析。结果显示:黄浦江干流1-6号采样点,水体六六六(HCHs)含量在0.1～0.12μg/L之间,滴滴涕(DDTs)含量在0.02～0.03μg/L之间;表层沉积物中HCHs含量在1.0～7.0μg/kg之间,DDTs含量在3.0～32.0μg/kg之间;支流7到15号采样点水体中只有HCHs检出,含量范围为0.02～0.03μg/L;支流周边土壤中DDTs含量范围为2.0～8.0μg/kg。根据表层水体和表层沉积物中的DDTs的含量检测结果判断,4–6号采样点附近有新的DDTs污染物排入河道。推断该地区可能存在使用三氯杀螨醇引入微量DDTs的情况。

HCHs and DDTs may accumulate in human body by drinking water.The upper stream of Huangpu River is the main surface drinking water sources of Shanghai.The concentrations of HCHs in the surface water samples are between 0.1 μg/L to 0.12 μg/L of branch river,while DDTs varied from 0.02 μg/L to 0.03 μg/L.The contents of HCHs in the sediments are from 1.0 μg/kg to 7.0 μg/kg,DDTs contents ranging from 3.0 μg/kg to 32.0 μg/kg.From the tributaries' samples,the concentrations of HCHs are 0.02～0.03 μg/L in the surface water of the tributaries of Huangpu River.DDTs content in the surface soils collected from the ambient of tributaries are 2.0～8.0 μg/kg.The source analysis from DDTs contents indicated that there was new DDTs input to the water environment around the sampling point 4 to point 6,which probably came from the use of dicofol.