文章摘要
彭越,马文明.云南某炼锌尾矿砂重金属释放实验研究[J].西南民族大学自然科学版,2020,46(1):26-32
云南某炼锌尾矿砂重金属释放实验研究
Experimental Research on the Heavy Metal Release from Zn Mine Tailings of Yunnan
投稿时间:2019-11-12  修订日期:2019-12-26
中文关键词: 尾矿砂  浸提  淋溶  重金属释放
英文关键词: tailing, extraction, leaching, heavy  metal releasing
基金项目:国家自然科学(31600378) 马文明
作者单位E-mail
彭越 西南民族大学化学与环境保护工程学院 pengyue2000@163.com 
马文明 西南民族大学 mawmtf@swun.edu.cn 
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中文摘要:
      通过浸提实验与淋溶实验分别模拟雨水淹没与雨水淋溶,探讨云南某炼锌尾矿砂的重金属释放规律。实验结果表明:该含硫尾矿砂具有pH缓冲能力;浸提液或淋溶液的pH值越低,释放的Zn与Pb越多,因此,可以通过提高尾矿砂的pH值防治重金属释放所带来的污染。在同一pH值条件下,雨水淹没释放的Zn比Pb多,而且释放较快;而雨水淋溶导致的这两种重金属释放量相对较少,因此淹没导致尾矿砂重金属Zn释放的环境风险较大。同时,浸提液与渗滤液中Zn与Pb的浓度-时间动力学特征符合二次曲线规律。
英文摘要:
      In order to study the heavy metals releasing rule of the Zn mine tailings of Yunnan, the extraction experiment and leaching experiment were designed to simulate rain down and rain leaching. The following conclusions can be gotten from the experiments’ results. This kind of tailing has pH keeping ability. As the pH value of the extraction or leaching solve is down and down, the Zn and the Pb released from the tailing become more and more. So the pollution resulted from the releasing of heavy metals can be avoided by raising the pH value of the tailing. The released Zn is more than released Pb from the tailing by rain down, and the releasing vision is rapid. The two kinds of heavy metals released by rain leaching are less than by rain down. So there is more environmental risks resulted from rain down than from rain leaching. The dynamic characteristics of the concentrations of Zn and Pb in the water to time are secondary curves.
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