危险废物贮存的地下水环境健康风险评价

借鉴美国EPACMTP模型和健康风险评价模型,建立了一种危险废物贮存时,其所含有的污染物通过浸出进入地下水后对目标敏感点处的受体所造成的地下水环境健康风险的评价方法。在此基础上,以电镀污泥为例,评价了其作为一般工业固体废物进行贮存管理时的地下水环境健康风险以验证该方法的有效性。结果表明,该方法需要参数少且计算简单;电镀污泥中的主要污染组分(Ni、Mn和Cr6+)在贮存过程中所引起的目标敏感点处的地下水环境健康非致癌风险为169.33(分别为Ni-118.60、Mn-50.11、Cr6+-0.62),远大于美国标准中非致癌的可接受风险(1.00);就该电镀污泥贮存对目标敏感点处产生的地下水环境健康风险而言,其不能作为一般工业固体废物进行贮存管理。

Health Risk Assessment for Groundwater Environment Related to Hazardous Waste Storage

A risk assessment was conducted for the groundwater environment potentially affected by the storage site of hazardous waste, e.g, electroplating sludge, using the EPACMTP model and a health risk assessment model recommended by U.S. EPA. The modeling results show that non-carcinogenic risk of the target contaminants including Ni, Mn and Cr~(6+) is 169. 33, which is far greater than the acceptable level according to the U.S standard (1.00), so the electroplating sludge should be carefully handled in view of health risk linked to drinking of the groundwater.