某农药生产场地中特征POPs的环境风险研究

用钻探采样和布设地下水监测井的方法，监测了华东某农药厂DDTs生产场地土壤中DDTs和HCHs等POPs类有机污染物. 结果表明，场地特征污染物DDTs和HCHs是土壤污染健康风险的最主要来源. DDTs的风险普遍高于HCHs，DDTs致癌风险最高可达5.4×10-3，非致癌危害商可达130；HCHs致癌风险最高可达4.3×10-4. 三氯杀螨醇车间土壤中DDTs风险高于DDTs车间. DDTs车间的前3层遭受DDTs污染面积较大, 其区域基本涵盖了HCHs污染范围；第4～6层也有约一半的区域遭受DDTs污染，但HCHs的污染已处于风险可以接受的水平. 三氯杀螨醇车间的前3层普遍受到DDTs和HCHs较严重的污染，面积几乎涵盖了整个车间区域. 

Environmental Risk of Specific POPs at a Pesticide Production Site

Organic pollutant POPs (DDTs, HCHs, etc.) in the soil of a DDTs production spot at a pesticide production plant in eastern China were monitored by the methods of drilling sampling and installing groundwater monitoring wells. The results showed that site-specific pollutants HCHs and DDTs were the major cause of human health risk in the contaminated soils. The risks of DDTs were higher than HCHs in most cases. The carcinogenic risks of DDTs could be as high as 5.4×10^-3. The non-carcinogenic risks showed a hazard quotient of 130. The carcinogenic risks of HCHs could be 4.3×10^-4. Risks of DDTs in the soils of the dicofol workplace were higher than those in the DDTs workplace. The top three layers in the DDTs workplace suffered DDTs contamination in a larger area. The soil pollution area of HCHs in the DDTs workplace almost overlapped with the DDTs-contaminated area. In the 4th, 5th and 6th layers, about half of the area was contaminated by DDTs. However, the risk of HCHs was at an acceptable level. In the dicofol workplace, soils in the top three layers were generally seriously contaminated by HCHs and DDTs, with the contamination area almost covering the entire workplace.