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沙颍河流域典型癌病高发区水体硝态氮污染及健康风险
Water nitrate nitrogen pollution and health risk in a typical high cancer incidence area of Shaying River basin
【摘要】 分别在雨季和旱季对癌病高发区地表水和地下水进行采样分析,探讨该区域地表水和地下水NO-3-N和NO-2-N污染状况、季节变化和空间分布特点,以及相应的健康风险.结果表明,雨季地表水和地下水NO-3-N含量明显高于旱季.受污染沙颍河水的影响,沿岸癌病高发村庄饮水井雨季NO-3-N污染严重,平均含量达到38.32 mg·L-1,超标近3倍,而旱季则存在NO-2-N污染,平均含量达到0.69 mg·L-1.研究区癌病高发村庄居民存在饮水NO-3-N暴露的健康风险,其年平均健康总风险达到1.02×10-8 a-1,为其他村庄居民的6倍以上,饮水NO-3-N污染是癌病高发村庄居民的健康危害因素.
【Abstract】 NO-3-N and NO-2-N concentrations are determined in samples from surface water and groundwater of rainy seaon and dry season differently in a high cancer incidence area. Seasonal variation and spatial distribution as well as the corresponding health risk caused by NO-3-N and NO-2-N are analyzed and evaluated. The results shown that with significant seasonal variation, NO-3-N concentrations in surface water and groundwater in rainy season are much higher than that in dry sean. As a result of the influence by severely polluted Shaying River, the drinking water of the cancer village are heavily polluted by NO-3-N in rainy season and NO-2-N in dry season. The average NO-3-N concentration in drinking water of the cancer village reached 38.32 mg·L-1 in rainy season, nearly 4 times of the standard, and the average NO-2-N concentration in drinking water of the cancer village reached 0.69 mg·L-1 in dry season. The results also indicated that health risk caused by noncarcinogens NO-3-N has occurred. The health risk for residents in cancer village reached 1.02×10-8 a-1, more than 6 times of the risk for residents in other village, which means that the NO-3-N pollution in drinking water was a main health hazard factor to the residents in cancer village.
【Key words】 high cancer incidence area； nitrate； nitrite； health risk；
- 【文献出处】 环境科学学报 ,Acta Scientiae Circumstantiae , 编辑部邮箱 ,2019年05期
- 【分类号】X52;R73-31
- 【网络出版时间】2018-12-28 08:18
- 【被引频次】11
- 【下载频次】366