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    王冰, 张永, 盛欣. 北京市政供水中三氯甲烷和四氯化碳含量分析及健康风险评估[J]. 环境卫生学杂志, 2022, 12(1): 51-55. DOI: 10.13421/j.cnki.hjwsxzz.2022.01.010
    引用本文: 王冰, 张永, 盛欣. 北京市政供水中三氯甲烷和四氯化碳含量分析及健康风险评估[J]. 环境卫生学杂志, 2022, 12(1): 51-55. DOI: 10.13421/j.cnki.hjwsxzz.2022.01.010
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    WANG Bing, ZHANG Yong, SHENG Xin. Concentrations and health risk assessment of trichloromethane and carbon tetrachloride in municipal water supply of Beijing[J]. Journal of Environmental Hygiene, 2022, 12(1): 51-55. DOI: 10.13421/j.cnki.hjwsxzz.2022.01.010
    Citation: WANG Bing, ZHANG Yong, SHENG Xin. Concentrations and health risk assessment of trichloromethane and carbon tetrachloride in municipal water supply of Beijing[J]. Journal of Environmental Hygiene, 2022, 12(1): 51-55. DOI: 10.13421/j.cnki.hjwsxzz.2022.01.010
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    北京市政供水中三氯甲烷和四氯化碳含量分析及健康风险评估

    Concentrations and health risk assessment of trichloromethane and carbon tetrachloride in municipal water supply of Beijing

      摘要
    • 摘要:
      目的 了解南水北调之后北京市市政水中三氯甲烷和四氯化碳的浓度水平，评估其对人体健康的潜在风险。
      方法 收集了2015—2019年北京市出厂水、末梢水和二次供水中三氯甲烷和四氯化碳的监测数据，利用美国环保局(USEPA)推荐的健康风险评价四步法模型对其进行健康风险评估。
      结果 4 292件监测水样中，三氯甲烷平均浓度为0.003 00 mg/L，四氯化碳平均浓度为0.000 62 mg/L，两种污染物的合格率均为100%。三氯甲烷和四氯化碳的致癌风险分别为3.23×10-6、1.51×10-7；非致癌风险分别为1.04×10-2、5.39×10-4。
      结论 北京市市政水中四氯化碳的健康风险较小，三氯甲烷的健康风险属于可接受范围，但由于南水北调后水质变化较大，仍需要继续监测并提出风险管控措施。

       

      Abstract:
      Objective To understand the average concentrations and potential health risks of trichloromethane (CHCl3) and carbon tetrachloride (CCl4) in municipal water of supply Beijing after the implementation of South-to-North Water Transfer Project.
      Methods The monitoring data of CHCl3 and CCl4 in treated water, tap water, and secondary water supply were collected in Beijing during 2015-2019. The four-step health risk assessment model recommended by United States Environment Protection Agency (USEPA) was adopted to assess the health risk of them.
      Results A total of 4 292 water samples were collected, the average concentrations of CHCl3 and CCl4 were 0.003 mg/L and 0.000 62 mg/L, respectively, and the qualified rates were both 100%. The carcinogenic risk values were 3.23×10-6 for CHCl3 and 1.51×10-7 for CCl4; the non-carcinogenic health risk values were 1.04×10-2 for CHCl3 and 5.39×10-4 for CCl4.
      Conclusion The health risk of CCl4 in municipal water supply of Beijing was low, and the health risk of CHCl3 was within the acceptable range. The South-to-North Water Transfer Project has greatly changed the quality of municipal water supply of Beijing, and still needing to continue the monitoring of water quality and propose risk management measures.

       

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