Exposure level and health risk assessment of chlorination disinfectant by-products in drinking water in Xiangyang City
10.3969/j.issn.1006-2483.2021.04.015
- VernacularTitle:襄阳市城区生活饮用水中氯化消毒副产物暴露水平及健康风险评价
- Author:
Jinyi LI
1
,
2
;
Yunbo FANG
2
;
Xuetao WANG
2
;
Wei HU
2
;
Xiangyu SHI
2
;
Chunhong WANG
1
Author Information
1. School of Health Science, Wuhan University, Wuhan 430071, China
2. Xiangyang Center for Disease Control and Prevention, Xiangyang, Hubei 441022, China
- Publication Type:Journal Article
- Keywords:
Drinking water;
Disinfection by-products;
Health risk Assessme
- From:
Journal of Public Health and Preventive Medicine
2021;32(4):67-70
- CountryChina
- Language:Chinese
-
Abstract:
Objective To understand the exposure level of disinfection by-products (DBPs) in drinking water in Xiangyang City and to evaluate the health risks of the population, so as to provide reference for the safety risk control of drinking water. Methods Sampling and laboratory testing were conducted according to national standard methods. The risk assessment model provided by USEPA was used to evaluate the health risks. Results Trichloromethane (TCM), bromodichloromethane (BDCM), dibromochloromethane (DBCM) and tribromomethane (TBM) were detected in drinking water in Xiangyang City. The contents of halogenated hydrocarbon DBPs in water disinfected with liquid chlorine were higher than those with chlorine dioxide. The contents of three DBPs were higher in wet season than those in dry season except TBM. The content of TCM in pipe network terminal water and secondary water supply disinfected with chlorine dioxide was higher than that in factory water. The carcinogenic risk of DBPs in drinking water disinfected with liquid chlorine was 4.33×10-5, and the non-carcinogenic risk was 0.114. The carcinogenic risk of DBPs in drinking water disinfected with chlorine dioxide was 1.24×10-6, and the non-carcinogenic risk was 3.15×10-3. Conclusion The health risk of DBPs in drinking water in Xiangyang City is acceptable, but TCM produced by liquid chlorine disinfection should be paid more attention. It is recommended that chlorine dioxide disinfection be used to reduce the health risks of halogenated hydrocarbon DBPs.
