石煤矿遗留矿洞涌(渗)水重金属污染调查与评价

Investigation and Evaluation of Heavy Metal Pollution in the Water Gushing Out of the Mine Cave Left Over from the Stone Coal Mine

针对某石煤矿遗留矿洞涌(渗)水问题,明确特征污染物,全面评价区域生态环境风险,系统分析了22处矿涌(渗)水或地表水断面水样中镉、镍、铜、锌、锰和砷的浓度,利用单因子指数法、内梅罗指数法和综合生态危害指数法对该6种重金属的污染危害进行了全面评价。结果表明,该区域矿涌(渗)水的特征污染物为镉,各样本均受到重金属污染;3种评价方法的评价结果近似,均能满足矿涌(渗)水生态环境风险评价需求。

To targeting the problem of water gushing(seepage) in a residual mine of stone coal mine, the characteristic pollutants were clarified, and the regional ecological and environmental risks was comprehensively evaluated.The concentration of cadmium, nickel, copper, zinc, manganese and arsenic were systematically measured from 22 water gushing(seepage)points or surface drainage sections.The single factor index method, Nemerov index method and ecological harm index were adopted to comprehensively assess the contamination hazards of these six heavy metals.The results showed that, the characteristic pollutant in this region was cadmium, and each water sample was polluted by heavy metals.The results drawn by these three methods are similar, which can meet the needs of ecological and environmental risk evaluation of mine water gushing(seepage).