Abstract：Objective To understand the distribution level of trihalomethanes (THMs) disinfection byproducts in domestic drinking water in a certain district of Hangzhou City, and to evaluate the possible health risks to human beings. Methods The concentration of trihalomethanes in factory-treated water and tap water in the district of Hangzhou City during 2021-2022 was detected by headspace gas chromatography, and the risk assessment was conducted based on the health risk model recommended by the United States Environmental Protection Agency. Results The distribution of THMs content in drinking water in the district of Hangzhou City in 2021-2022 was ND-44.12 μg/L, the detection rate (100.00%) and average content (18.76 μg/L) of chloroform were the highest. In the comparison between groups, no significant difference was found in the distribution of THMs content between 2021 and 2022 (P>0.05). The content of THMs was higher in the wet period than in the dry period as well as higher in the tap water than in the factory-treated water (P<0.05). Carcinogenic risks (1.38×10-5 and 1.26×10-5) and non-carcinogenic risk (6.46×10-2 and 5.92×10-2) of THMs for males and females were within the acceptable ranges, with chloroform contributing the largest risks of carcinogenesis (50.14%) and non-carcinogenesis (80.32%). Conclusion THMs content in domestic drinking water in the district of Hangzhou City during 2021-2022 conformed to the limits as specified in the Standard Examination Methods for Drinking Water (GB/T 5750-2006). The health risks of THMs to human beings are within an acceptable range, with chloroform having the highest health risk and requiring special attention. In addition, it is necessary to strengthen the risk monitoring and evaluation of THMs in the wet period and in tap water.
郭惠珍, 洪宇伟, 谢鑫鑫, 李海鹏, 钱小平, 刘丹丹. 2021—2022年杭州市某区饮用水中三卤甲烷含量监测及风险评估[J]. 实用预防医学, 2024, 31(4): 435-439.
GUO Huizhen, HONG Yuwei, XIE Xinxin, LI Haipeng, QIAN Xiaoping, LIU Dandan. Content monitoring and risk assessment of trihalomethanes in drinking water in a certain district of Hangzhou City, 2021-2022. , 2024, 31(4): 435-439.
[1] Wagner ED,Plewa MJ.CHO cell cytotoxicity and genotoxicity analyses of disinfection by-products:an updated review[J].J Environ Sci (China),2017,58:64-76. [2] 刘俊萍,于建全,李青松,等. 浙江省H市供水系统消毒副产物及其健康风险评价[J].环境科学,2019,40(12):5302-5308. [3] Rook JJ.Formation of haloforms during chlorination of natural waters[J].Wat Treat Examin,1974,23(2):234-243. [4] Plewa MJ,Wagner ED,Richardson SD.TIC-Tox: a preliminary discussion on identifying the forcing agents of DBP-mediated toxicity of disinfected water[J].J Environ Sci (China), 2017,58:208-216. [5] Diana M,Felipe-Sotelo M,Bond T.Disinfection byproducts potentially responsible for the association between chlorinated drinking water and bladder cancer:a review[J].Water Res, 2019,162(1):492-504. [6] 王冰,张永,韩志宇,等. 2018—2020年某市饮用水中消毒副产物监测结果及风险评估[J].实用预防医学,2022,29(2):169-173. [7] 中华人民共和国卫生部.生活饮用水标准检验方法:GB 5750-2006 [S].北京:中国标准出版社,2007. [8] United States Environment Protection Agency.Office of superfund remediation and technology innovation.risk assessment guidance and technology innovation.Risk assessment guidance for surperfund,Volume I:human health evaluation manual (Part E,Supplemental guidance for dermal risk assessment) (EPA/540/R-99/005)[R].Washington DC:USEPA,2004. [9] United States Environment Protection Agency.Risk assessment guidance for surperfund,volume I:human health evaluation manual (Part A) interim final[S].US EPA,1989. [10] 吕沈聪,高薇薇,葛淼华,等. 顶空-气相色谱法检测生活饮用水11种挥发性卤代烃分析[J].预防医学,2017,29(4):430-432. [11] Liu XY,Chen L,Yang MT,et al.The occurrence,characteristics,transformation and control of aromatic disinfection by-products: a review[J].Water Res, 2020,184(13):116076. [12] 杨洛贤,縢卫林,王强,等. 2014年杭州市主城区饮用水中消毒副产物的分布及其健康风险[J].环境与职业医学,2016,33(3):237-242. [13] 赵玉丽,李杏放. 饮用水消毒副产物:化学特征与毒性[J].环境化学,2011,30(1):20-33. [14] 费娟,王雪娇,郑浩,等. 江苏省城市饮用水氯化消毒副产物的健康风险评估[J].江苏预防医学,2021,32(5):554-557. [15] 魏建荣,王振刚,郭新彪,等. 生活饮用水中消毒副产物的分布水平[J].环境与健康杂志,2004,21(1):33-37. [16] 赵桂鹏,邹柯婷,徐清,等. 西安市市政供水三氯甲烷分布特征及多途径暴露健康风险评估[J].现代预防医学,2023,50(4):611-617.
2024, Vol. 31 
