陈云增,李天奇,马建华,阮心玲,王琳,邹桂英.沙颍河流域典型癌病高发区水体硝态氮污染及健康风险[J].环境科学学报,2019,39(5):1698-1707
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
- 基金项目：国家自然科学青年基金（No.41301336）；教育部和河南省共建河南大学项目（No.SBGJ0907010）
- 陈云增
- 1. 河南大学环境与规划学院, 开封 475004;2. 河南大学资源与环境研究所, 开封 475004
- 李天奇
- 河南大学环境与规划学院, 开封 475004
- 马建华
- 1. 河南大学环境与规划学院, 开封 475004;2. 河南大学资源与环境研究所, 开封 475004
- 阮心玲
- 1. 河南大学环境与规划学院, 开封 475004;2. 河南大学资源与环境研究所, 开封 475004
- 邹桂英
- 河南大学环境与规划学院, 开封 475004
- 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NO3--N和NO2--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NO3--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NO3--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NO2--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NO3--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NO3--N污染是癌病高发村庄居民的健康危害因素.
- Abstract：NO3--N and NO2--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 NO3--N and NO2--N are analyzed and evaluated. The results shown that with significant seasonal variation, NO3--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 NO3--N in rainy season and NO2--N in dry season. The average NO3--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 NO2--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 NO3--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 NO3--N pollution in drinking water was a main health hazard factor to the residents in cancer village.
