无锡市自来水中三卤甲烷含量及其对成人的致癌风险  

The concentrations of trihalomethanes in tap water in Wuxi City and their cancerigenic risks to adults

作　　者：周伟杰[1] 陈晓峰[1] 黄春华[1] 丁新良[1] 

机构地区：[1]无锡市疾病预防控制中心,江苏无锡214023

出　　处：《实用预防医学》2015年第5期550-552,共3页Practical Preventive Medicine

基　　金：无锡市科技局;无锡市卫生局科研基金资助课题(编号CSEW1N1101;CSZ00N1237;Q201201)

摘　　要：目的了解无锡市自来水中三卤甲烷污染情况,评估其对成人的致癌风险。方法于2008-2013年对无锡市水源水、出厂水和末梢水中三卤甲烷进行检测,并采用美国环保局推荐的低剂量致癌风险评价方法对其进行评价。结果出厂水、末梢水中的三卤甲烷浓度均显著高于水源水(P<0.05),末梢水三溴甲烷、一氯二溴甲烷的浓度均显著高于出厂水(P<0.05)。四个水厂间三卤甲烷浓度差异有统计学意义(P<0.05)。水源水、出厂水和末梢水中三卤甲烷对成人的致癌风险分别为1.46×10-6、3.67×10-5、5.61×10-5,其中一氯二溴甲烷和二氯一溴甲烷的致癌风险较高。结论无锡市自来水中三卤甲烷浓度均低于GB5749-2006标准限值,但是对成人具有潜在的致癌风险。Objective To investigate the pollution status of trihalomethanes（ THMs） in tap water of Wuxi City and evaluate their cancerigenic risks to adults. Methods The source water,finished water and periphery water in Wuxi City were detected for THMs in 2008- 2013,and their cancerigenic risks were evaluated using the method recommended by the US Enviromental Protection Agency（ USEPA）. Results The concentrations of the THMs in the finished water and periphery water were significantly higher than those in the source water（ P 〈0. 05）. The periphery water had higher concentrations of bromoform（ CHBr3）chlorodibromomethane（ CHBr2Cl） and bromodichloromethane（ CHBr Cl2） than the finished water（ P 〈0. 05）. The THMs concentrations were statistically different among four water factories（ P 〈0. 05）. The cancerigenic risks of THMs in the source water,finished water and periphery water were 1. 46 × 10- 6,3. 67 × 10- 5and 5. 61 × 10- 5,respectively. And CHBr2 Cl and CHBr Cl2 had higher risks. Conclusions The concentrations of the THMs in the tap water of Wuxi are lower than the limiting values formulated by GB5749- 2006,but they have potential cancerigenic risks to adults.

关 键 词：自来水 三卤甲烷 致癌风险 

分 类 号：R123.1[医药卫生—环境卫生学]