某选矿药剂厂地下水重金属健康风险评价

健康风险评价是将环境污染与人体健康联系起来,以风险度为评价指标来表征环境污染物对人体健康产生危害的一种风险评价方法。对某选矿药剂厂地下水中的重金属进行调查研究,并灵活运用模糊化分级评价标准分别评价了地下水体中的重金属对成人和儿童造成的人体健康风险水平。研究结果表明,地下水环境中重金属污染对成人所致健康危害的个人年均风险值属于中风险水平和中—高风险水平,对儿童所致健康危害的个人年均风险值均属于中—高风险水平;致癌重金属比非致癌重金属所致个人年均风险值大,其所致健康危害的风险大小依次为Cr^(6+)>As>Cd,其中Cr^(6+)对成人的个人年均风险最大值为5.52×10^(-5)a^(-1);对儿童的个人年均风险最大值为1.75×10^(-4)a^(-1),应优先选择控制。

Health risk assessment is a risk assessment method which links environmental pollution with human health and takes risk degree as an evaluation index to represent the harm of environmental pollutants to human health.This paper mainly studies the heavy metals in groundwater of a concentrator,the risk level of human health caused by heavy metals in groundwater for adults and children was evaluated flexibly by using the fuzzy grading evaluation criteria.The results show that the average annual risk of individual health hazards caused by heavy metal pollution in groundwater environment belongs to the middle risk level and the middle-high risk level. The average annual risk of individual health hazards caused by heavy metal pollution to children belongs to the middle-high risk level.The average annual risk of carcinogenic heavy metals is higher than that of non-carcinogenic heavy metals. The risk of health hazards caused by carcinogenic heavy metals is Cr6+> As > Cd,in which the maximum annual risk of Cr6+to adults is 5.52×10-5 a-1,and the maximum annual risk to children is 1.75×10-4 a-1,which should be controlled preferentially.