某地下水源地有机污染健康风险评价  

Health Risk Assessment of Organic Pollution in a Groundwater Source

作　　者：刘姝媛[1] 王红旗[1] 

机构地区：[1]北京师范大学水科学研究院水沙科学教育部重点实验室,北京100875

出　　处：《环境科学与技术》2014年第2期174-177,194,共5页Environmental Science & Technology

基　　金：环保公益性行业科研专项经费重大项目(201009009)

摘　　要：根据USEPA推荐使用的健康风险评价方法,结合水源地实际情况,分析评价了水源地地下水有机污染对区域内暴露人群造成的健康风险。评价结果表明:水源地有机污染物主要为四氯乙烯、三氯乙烯、三氯甲烷和四氯化碳。水源地内没有检测井的非致癌风险超过了规定的限值1.0,均在可接受范围内;而有3个检测井的致癌风险均超过了10-4的规定限值,是不可接受的。产生致癌风险的主要污染物为四氯乙烯,占总致癌风险的61.60%。主要的暴露途径是呼吸吸收,占总风险81%左右,其次为饮水吸收,皮肤接触暴露途径产生的健康风险较小,占总风险的比例小于1%。Based on the evaluation method for health risk of contaminated sites recommended by USEPA, in combination with the actual situation of the groundwater source, the authors analyzed and evaluated the health risk of groundwater organic pollution in a groundwater source. Result showed that the organic pollutants in groundwater include tetrachloroethylene, trichloroethylene, carbon tetrachloride and chloroform. There are no points exceeding the prescribed limit of 1.0 in non- carcinogenic risk, and 3 points exceeding the prescribed limits of 10 -~ in carcinogenic risk, which are unacceptable. Tetrachloroethylene is a major pollutant of carcinogenic risk, accounting for 61.60% of the total cancer risk. The main exposure way is the inhalation absorption, which accounts for 81% of the total risk, followed by oral absorption. The carcinogenic risk via the dermal pathway is negligible, which is less than 1% of the total risk.

关 键 词：地下水 有机污染 健康风险评价 致癌风险 非致癌风险. 

分 类 号：X820.4[环境科学与工程—环境工程]