天津市海岸带地下水重金属特征与健康风险评价

为了解天津市海岸带地下水重金属的分布特征、海水入侵对重金属含量的影响及其对居民健康的影响，运用统计学、相关性分析等方法对研究区海水入侵情况、地下水重金属特征及海水入侵对地下水重金属含量的影响进行了研究，并运用USEPA的健康风险评价模型对地下水中重金属产生的健康风险做出了评价。结果表明:重金属含量排序为Mn>Ba>Zn>Cu>As>Ni>Cr>Pb>Cd，研究区地下水受海水入侵影响明显，导致地下水中Mn含量上升；重金属致癌风险排序为Cr>As>Cd，健康风险排序为Mn>Cu>Pb>Ba>Ni>Zn，其中Mn的健康风险远大于其他重金属，海水入侵对健康风险程度产生较大影响；整体而言，研究区地下水中致癌污染物的致癌风险大于非致癌污染物的健康风险。

Characteristics of heavy metals and health risk assessment of groundwater in Tianjin coastal area

In order to understand the distribution characteristics of heavy metals in Tianjin coastal groundwater, the influence of seawater intrusion on the content of heavy metals and the influence of heavy metals on the health of residents, this study used statistics, correlation analysis and other methods to study the seawater intrusion situation in the study area, the characteristics of heavy metals in groundwater and the influence of seawater intrusion on the content of heavy metals in groundwater, and the groundwater was evaluated by USEPA's health risk assessment model. The results show that the order of heavy metal content is Mn>Ba>Zn>Cu>As>Ni>Cr>Pb>Cd, the groundwater in the study area was significantly affected by seawater intrusion, which resulted in the increase of Mn content in the groundwater. The carcinogenic risk of heavy metals was ranked Cr>As>Cd, and the health risk was ranked As Mn>Cu>Pb>Ba>Ni>Zn, among them, the health risk of Mn is much higher than that of other heavy metals, and seawater intrusion can have a great impact on the health risk. Overall, the carcinogenic risk of carcinogenic pollutants in the groundwater of the study area was greater than the health risk of non-carcinogenic pollutants.