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    韩嘉艺, 叶必雄, 张岚. 某市饮用水中10种污染物的健康风险评价[J]. 环境卫生学杂志, 2019, 9(3): 203-209. DOI: 10.13421/j.cnki.hjwsxzz.2019.03.002
    引用本文: 韩嘉艺, 叶必雄, 张岚. 某市饮用水中10种污染物的健康风险评价[J]. 环境卫生学杂志, 2019, 9(3): 203-209. DOI: 10.13421/j.cnki.hjwsxzz.2019.03.002
    shu
    HAN Jiayi, YE Bixiong, ZHANG Lan. Health Risk Assessment of 10 Pollutants in a City's Drinking Water[J]. Journal of Environmental Hygiene, 2019, 9(3): 203-209. DOI: 10.13421/j.cnki.hjwsxzz.2019.03.002
    Citation: HAN Jiayi, YE Bixiong, ZHANG Lan. Health Risk Assessment of 10 Pollutants in a City's Drinking Water[J]. Journal of Environmental Hygiene, 2019, 9(3): 203-209. DOI: 10.13421/j.cnki.hjwsxzz.2019.03.002
    shu

    某市饮用水中10种污染物的健康风险评价

    Health Risk Assessment of 10 Pollutants in a City's Drinking Water

      摘要
    • 摘要:
      目的 评价某市饮用水中砷等10种污染物经饮水途径对人体的健康风险，为饮用水健康风险管理提供理论依据。
      方法 2017年根据某市市政水厂的供水范围，选择128个监测点开展监测，分别于丰水期和枯水期各采集128份水样，按照《生活饮用水标准检验方法》（GB/T 5750-2006）进行浓度检测。运用环境健康风险评估四步法定量分析我国某市饮用水中As、Se两种类重金属、Cd、Cr（Ⅵ）、Pb、Hg、Cu、Zn等6种重金属及CHCl3、CCl4两种有机物的非致癌风险值和致癌风险值。
      结果 某市饮用水中上述十种污染物浓度均符合《生活饮用水卫生标准》（GB 5749-2006）的要求，达标率100%。居民经口摄入自来水非致癌总风险值为0.122，处于可接受范围内;致癌总风险值为2.59×10-5，有致癌风险。其中砷的暴露对非致癌风险和致癌风险贡献率均最大，三氯甲烷的致癌风险也高于10-6的可接受风险。末梢水和二次供水中铜的风险值要高于出厂水，锌风险值要低于出厂水;丰水期总致癌风险要高于枯水期;深度处理的水样其非致癌总风险更小。
      结论 某市饮用水中经饮水途径暴露As等10种污染物产生的致癌风险超过可接受风险水平;其中砷的健康风险最高。

       

      Abstract:
      Objectives To evaluate the health risk of arsenic (As) and other 9 pollutants in drinking water of a city through drinking water exposure, and to provide theoretical basis for drinking water health risk management.
      Methods In 2017, 128 monitoring sites were selected for monitoring, and 128 water samples were collected in both wet season and dry season according to water supply area of the city municipal waterworks. The non-carcinogenic risk values and carcinogenic risk values of 2 metalloids, As and Se, 6 heavy metals, Cd, Cr(Ⅵ), Pb, Hg, Cu, and Zn, as well as 2 organic matters, CHCl3 and CCl4, in drinking water of the city were quantitatively analyzed by using the four-step environmental health risk assessment method.
      Results All of the concentrations of the above ten pollutants in drinking water met the requirements of Drinking Water Sanitary Standard (GB 5749-2006), the standard compliance rate was 100%. The total non-carcinogenic risk value of residents' oral intake of tap water was 0.122, which was within the acceptable range. The total risk value of carcinogenesis was 2.59×10-5, indicating carcinogenic risk. As exposure contributed the most to both non-carcinogenic and carcinogenic risks, and the carcinogenic risk of CHCl3 was higher than the acceptable risk of 10-6. The risk value of Cu in tap water and secondary water supply was higher than that of finished water, and the risk value of Zn was lower than that of finished water. The total carcinogenic risk in wet season was higher than that in dry season. The total non-carcinogenic risk was lower in the advanced treatment water samples.
      Conclusions The carcinogenic risk of drinking water in the city exceeds the acceptable risk level, and As has the highest health risk.

       

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