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.
In order to study the release of heavy metals from the zinc mine tailings in Yunnan province,the extraction experi ment and leaching experiment were designed to simulate rain down and rain leaching.The following conclusions were drawn from the experiment results:This kind of tailing has pH buffer capacity;As the pH value of the extraction or leaching solve is reduced,the Zn and the Pb released from the tailing increase,so the pollution resulting from the heavy metals can be avoided by raising the pH value of the tailing;More Zn is released than Pb from the tailing by rain down,and the releasing is rapid;The two heavy metals released by rain leaching are less than those by rain down,so there is more environmental risks resulting from rain down than those from rain leaching;The dynamic characteristics of the concentrations of Zn and Pb in the water to time are secondary curves.
作者
彭越
马文明
PENG Yue;MA Wen-ming(School of Chemistry and Environmental Protection Engineering,Southwest Minzu University,Chengdu 610041,P.R.C.;Office for International Cooperation and Exchanges,Southwest Minzu University,Chengdu 610041 P.R.C.)
出处
《西南民族大学学报（自然科学版）》
CAS
2020年第1期26-32,共7页
Journal of Southwest Minzu University(Natural Science Edition)
基金
国家自然科学基金项目(31600378)。
关键词
尾矿砂
浸提
淋溶
重金属释放
tailing
extraction
leaching
heavy metal releasing
