北京市朝阳区自来水中三卤甲烷对成人的致癌风险评价  

Cancer Risk Assessment of Trihalomethanes for Adults in Tap Water of Chaoyang District in Beijing

作　　者：赵艳玲[1] 张桂斌[1] 张美云[1] 赵金辉[2] 

机构地区：[1]北京市朝阳区疾病预防控制中心公共卫生一科,北京100021 [2]北京市疾病预防控制中心环境卫生所

出　　处：《环境与健康杂志》2012年第5期437-439,共3页Journal of Environment and Health

基　　金：北京市自然科学基金(7092048)

摘　　要：目的评估北京市朝阳区自来水中三卤甲烷对成人的致癌风险。方法分别于2009年冬天(11—12月)和2010年夏天(7—8月),对朝阳区随机抽取的100户家庭进行调查和自来水(市政供水、二次供水和自备供水)水样采集,测定水中氯仿、一溴二氯甲烷、二溴一氯甲烷、溴仿4种三卤甲烷的浓度。采用美国环保局推荐的致癌风险评价方法和蒙特卡罗(Monte-Carlo)模拟对自来水中三卤甲烷的致癌风险进行概率分析。结果自来水中氯仿、一溴二氯甲烷、二溴一氯甲烷、溴仿累积概率为90%时的致癌风险分别为2.0×10^(-6)、1.4×10^(-5)、1.1×10^(-5)、1.1×10^(-6)。致癌风险最高的是二次供水,其次为市政供水和自备供水。结论北京市朝阳区自来水中三卤甲烷对成人具有潜在的致癌风险。Objective To evaluate the cancer risk of trihalomethanes in tap water for the adults in Chaoyang district, Beijing. Methods A total of 100 families were randomly selected in Chaoyang district. The tap water （including municipal water,secondary water and community water） of those families were collected in winter （November-December, 2009） and summer （July-August, 2010） respectively. The concentration of CHC13, CHBrC12, CHBr2C1 and CHBr3 were determined. The cancer risk assessment formula recommended by the United States Environmental Protection Agency （US EPA） and Monte-Carlo Simulation were used to assess the cancer risk of trihalomethanes in tap water. Results When the cumulative probability was 90%,the cancer risk of trihalomethanes in tap water were 2.0×10^-6 （CHCI3）, 1.4×10^-5 （CHBrC12）, 1.1×10^-5（CHBr2C1）, 1.1×10^4 （CHBr3） respectively. The cancer risk of three types of tap water from high to low were secondary water,municipal water and water supply for self-use. Conclusion The trihalomethanes in tap water has potential cancer risk for the adults in Chaoyang distriet, Beijing.

关 键 词：自来水 三卤甲烷 风险评价 蒙特卡罗模拟 

分 类 号：R123.1[医药卫生—环境卫生学]