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.
出处
《环境与健康杂志》
CAS
CSCD
北大核心
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)
关键词
自来水
三卤甲烷
风险评价
蒙特卡罗模拟
Tap water
Trihalomethanes
Risk assessmentt
Monte-Carlo simulation
