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在对虞城县惠楼村山药种植区地下水中Cr、Cd、Pb、Zn和Cu含量测定的基础上,应用美国环境保护局健康风险评价模型评价了各个重金属通过饮水途径所致的健康风险。结果表明,地下水重金属对该地区居民已经造成了一定的健康危害。由饮水途径所致健康风险中,所有样点的化学致癌物Cr和Cd的个人年风险在10~(-4)a~(-1)以上水平,某些样点Cd的个人年风险也在5.0×10~(-5)a~(-1)以上水平,超过了国际辐射防护委员会(ICRP)推荐的最大可接受风险水平,且平均占到总年风险的99.9%,其中Cr对总风险的贡献率平均达到96.73%,是最主要的致癌重金属;非化学致癌物Pb、Zn和Cu的个人年风险均低于ICRP最大可接受风险水平。对照区地下水致癌重金属的个人年风险和总年风险均高于山药种植区。今后要加强研究区地下水中Cr的来源和去除技术研究。
Based on the determination of Cr, Cd, Pb, Zn and Cu contents in the groundwater of Yamou Village in Yucheng County, the health risks caused by heavy metals in drinking water were evaluated by the US Environmental Protection Agency health risk assessment model. The results show that heavy metals in groundwater have caused some health hazards to residents in this area. The annual risk of chemical carcinogens Cr and Cd at all samples was above 10 -4 (a -1) by the drinking water route, and the annual risk of some samples Cd was also Above the level of 5.0 × 10 ~ (-5) a ~ (-1), it exceeds the maximum acceptable risk level recommended by the International Commission on Radiological Protection (ICRP) and accounts for 99.9% of the total annual risk. Cr affects the total risk The average annual contribution rate of non-chemical carcinogens Pb, Zn and Cu is lower than the maximum acceptable risk level of ICRP. The annual and annual risk of carcinogenicity of heavy metals in groundwater in controlled area are all higher than that of yam planting area. In the future, it is necessary to study the source and removal of Cr in groundwater in the study area.