【摘要】 目的 监测武汉主城区生活饮用水中三氯甲烷、一氯二溴甲烷、二氯一溴甲烷、三溴甲烷、二氯乙酸和三氯乙酸六项消毒副产物的浓度，评估潜在健康风险。方法 采集2023—2024年中心城区水样373件，按《生活饮用水标准检验方法》进行检测。统计六种消毒副产物的检出率，比较不同时期、不同水样类型六种消毒副产物的浓度差异。采用美国环境保护署推荐的健康风险评估模型进行风险评估。结果 六种消毒副产物的检出率为三氯甲烷>二氯一溴甲烷>一氯二溴甲烷>三氯乙酸>三溴甲烷>二氯乙酸。出厂水二氯一溴甲烷高于末梢水、二氯乙酸低于末梢水。枯水期六种消毒副产物均高于丰水期。致癌风险呈三氯乙酸>二氯乙酸>二氯一溴甲烷>一氯二溴甲烷>三溴甲烷，非致癌风险呈三氯甲烷>三氯乙酸>二氯一溴甲烷>一氯二溴甲烷>二氯乙酸>三溴甲烷。结论 三氯乙酸为致癌风险最高的物质，三氯甲烷为非致癌风险最高的物质，应重点关注。更多还原

【Abstract】 Objective To monitor the concentrations of six disinfection byproducts including trichloromethane, dibromochloromethane, bromodichloromethane, tribromomethane, dichloroacetic acid and trichloroacetic acid in drinking water in the main urban area of Wuhan, and to assess the potential health risks. Methods A total of 373 samples were collected from the central urban area during 2023 to 2024.The concentrations of the substances were tested according to the national Standard Examination Methods for Drinking Water.The detection rates of the six disinfection byproducts were statistically analyzed, and the concentration differences of the six disinfection byproducts in different time periods and different types of water samples were compared.The health risk assessment model recommended by the United States Environmental Protection Agency was used for risk assessment. Results Trichloromethane was the most common substance found in drinking water, followed by dichlorobromomethane, chlorodibromomethane, trichloroacetic acid, tribromomethane, and finally dichloroacetic acid.The concentration of dichlorobromomethane in treated water was higher than that in tap water, while the concentration of dichloroacetic acid was lower than the tap water, both with significant differences.The concentrations of the six chlorination disinfection by-products in the dry season were all significantly higher than those in the wet season.The carcinogenic risks of the disinfection byproducts were trichloroacetic acid >dichloroacetic acid > dichlorobromomethane >chlorodibromomethane >tribromomethane, and the non-carcinogenic risks were trichloromethane >trichloroacetic acid >dichlorobromomethane >chlorodibromomethane >dichloroacetic acid >tribromomethane. Conclusion Trichloroacetic acid is the substance with the highest carcinogenic risk, while trichloromethane is the non-carcinogenic substance with the highest risk, which requires special attention.更多还原