吉林松花江沿岸土壤中有机氯农药残留特征及健康风险评价

RESIDUES AND HEALTH RISK ASSESSMENT OF ORGANOCHLORINE PESTICIDES IN SOILS ON THE SHORE OF SONGHUA RIVER IN JILIN CITY,CHINA

选用GC/ECD分析吉林市松花江两岸土壤中17种有机氯农药(OCPs)残留情况,并探讨该区土壤中OCPs的残留特征及其可能的健康风险.研究结果表明,17种OCPs均有不同程度的检出,含量较高的组分为六六六(HCHs)、滴滴涕(DDTs)和七氯,总有机氯农药含量为133.15—1263.80 ng.g-1.研究区OCPs的来源解析表明,OCPs主要来自于早期农药的残留及林丹的使用.利用健康风险评价模型对土壤中HCHs、DDTs健康风险进行评价,目前研究区土壤中HCHs、DDTs类污染物对人体健康的风险处于较低水平.

The residual characteristics of 17 organochlorine pesticides（OCPs） and health risk of dichlorodiphenyltrichloroethanes（DDTs） and hexachlorocyolohexanes（HCHs） in soils on the shore of Songhua River in Jilin City were studied in this paper.Pesticides were analyzed by GC/ECD.The result showed that 17 OCPs were detected in the soil samples.Furthermore,DDTs,HCHs,and heptachlor had relatively high concentrations.The concentrations of ∑OCPs ranged from 133.15 to 1263.80 ng·g-1.The source of OCPs was researched and the result indicated that the residue of OCPs might be due to the past use of lindane.Based on the model of environmental health risk assessment,the health risk caused by the DDTs and HCHs was calculated,which was relatively low in the soils on the shore of Second Songhua River in Jilin City.