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以AMD污染湖泊底质为研究对象,通过设置0%~10%八个添加比例的碳酸钙和磷尾矿,分别对AMD污染底质进行7天的连续浸提试验,并测定浸提液中pH、Eh、EC、SO_4~(2-)等特征指标浓度,评价两种不同矿物组分对AMD污染底质的污染控制效果。结果表明:碳酸钙?磷尾矿的添加可以显著提高污染底质的pH,并显著降低污染底质的氧化还原电位,但EC和SO_4~(2-)却有不同程度的升高,且碳酸钙处理下其增幅显著低于磷矿粉处理。
Taking AMD contaminated lake sediments as the research object, the contaminated sediment of AMD was continuously extracted for seven days by setting up eight calcium carbonate and phosphor tailings in 0% ~ 10% pH, Eh, EC, SO_4 ~ (2-) and other characteristics of indicators of concentration, evaluation of two different mineral components of AMD pollution control substrate contamination effect. The results show that the addition of calcium carbonate tailings can significantly increase the pH of the contaminated substrate and significantly reduce the redox potential of contaminated substrates, but the EC and SO_4 ~ (2-) increased to some extent, The increase of calcium treatment was significantly lower than that of phosphate rock treatment.