再生水中三卤甲烷的致癌危险度评价  

Cancer Risks Assessment for Trihalmethanes in Reclaimed Water in Beijing

作　　者：王静芬[1] 何兴海[2] 陈清[3] 马世豪[2] 潘小川[3] 

机构地区：[1]山西省卫生厅卫生监督所,山西太原030024 [2]北京市环境保护科学研究院,北京100037 [3]北京大学医学部公共卫生学院,北京100191

出　　处：《环境与健康杂志》2009年第2期129-131,共3页Journal of Environment and Health

摘　　要：目的评价再生水回用于公园绿化和道路压尘时,再生水中三卤甲烷(THMs)的致癌危险度。方法:于2003—2004年调查北京市再生水经氯化消毒后回用于道路压尘和公园绿化时三卤甲烷的浓度水平,分别对接触再生水的职业人群(道路压尘清洁车司机和绿化园丁)和非职业人群(道路压尘工作现场10 855人次,公园再生水浇灌区游客约113 109人次)接触再生水的方式及暴露水平进行调查分析,用健康危险度评价的方法评价THMs对不同人群的健康影响和致癌危险度。结果再生水中氯仿、一溴二氯甲烷、二溴一氯甲烷、三溴甲烷的浓度分别为0.875～108、0.06～11.0、未检出～5.82、未检出～3.04μg/L。再生水回用于道路压尘、公园绿化,人群通过吸入和皮肤两种途径暴露于再生水,吸入暴露为主要途径,其消毒副产物THMs中,主要化合物为氯仿、一溴二氯甲烷,其次为二溴一氯甲烷和三溴甲烷。结论本次调查的再生水三卤甲烷对职业人群和非职业人群的致癌危险度均小于10-5,低于USEPA可接受水平。Objective To evaluate the cancer risk from trihalmethanes in the reclaimed water using for road clearing and public garden virescence in Beijing. Methods The reclaimed water samples were collected and the concentration of trihalmethanes was determined, the questionnaires were used to investigate the way and level to exposure to THMs for the occupational workers and general populations respectively when the reclaimed water was used in road clearing and public garden virescence, based on this, health risks assessment method was used to evaluate health affect of THMs in reclaimed water on population quantitatively , in 2003. Results Inbreathe and dermal exposure to THMs in reclaimed water were the main ways of exposure for occupational worker and general populations in road clearing and public garden virescence in Beijing. The major components of THMs in the reclaimed water were TCM, BDCM, DBCM and TBM respectively. Conclusion The cancer risk of the occupational workers and general peoples exposure to THMs is less than 1 × 10^-5, lower than the acceptable level documented by USEPA.

关 键 词：再生水 三卤甲烷 健康危险度评价 

分 类 号：R122.2[医药卫生—环境卫生学]