某废弃化工场地地下水有机污染健康风险评价

Health Risk Assessment of Groundwater Organic Pollution in an Abandoned Chemical Plant

根据U.S.EPA的健康风险评价模型,笔者评价了某废弃化工场地对人体的健康风险,结果表明:1)该场地地下水的典型有机污染物为1,2-二氯丙烷、苯、甲苯、三氯甲烷;2)对于非致癌风险和致癌风险,3种暴露途径的健康风险顺序均为:呼吸途径>饮水途径>皮肤接触途径;3)非致癌风险中3个点超过规定限值1.0,致癌风险中4个点均超过规定限值10-6,是不可接受的。保持居住环境内空气畅通,可以在一定程度上降低健康风险。

Based on the Health Risk Assessment Model made by U.S.EPA, the authors analyzed and evaluated the health risk of groundwater organic pollution at an abandoned chemical plant. The results show that the typical organic pollutants in this plant include 1,2-Dichloropropane,benzene,Toluene,Chloroform. Secondly, non-cancer risk and cancer risk are concerned, the health risks for three exposure pathways decrease as following order： inhalation, drinking water and the derma contact. Thirdly, there are three points exceeding the prescribed limit of 1.0 in non-carc inogenic risk, and four points exceeding the prescribed limits 10-6 in carcinogenic risk,which are unacceptable. It＇s suggested that keeping the air flow in living environment can reduce health risk to a certain extent.