含锌离子的矿坑水混凝沉淀处理方法  

Removal of Zn ions from mine water by coagulation precipitation

作　　者：黄国忠[1] 张忠园[1] 余阳先[2] 杨伟忠[2] 韦方景 李登琨 张丽敏[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]广西华锡集团股份有限公司,广西545006

出　　处：《北京科技大学学报》2012年第11期1245-1249,共5页Journal of University of Science and Technology Beijing

摘　　要：根据铜坑矿矿坑水的水质特征,选取了复合混凝法对其进行处理,通过单因素及正交试验,研究了混凝剂和助凝剂配比、溶液pH值、搅拌速度和搅拌时间等因素对矿坑水中Zn2+去除效果的影响,确定了各因素的较佳水平.当聚合氯化铝(PAC)/聚丙烯酰胺(PAM)为2∶1,协同效应达到最好;pH值为9,搅拌速度为80 r.min-1,搅拌时间为10 min时,处理效果最佳.经实际水样处理试验结果表明:Zn2+去除率达93.9%,出水中Zn2+质量浓度满足国家排放标准要求.Based on the distinguishing feature of mine water from Tongkeng Mine in south China,a complex coagulation method was selected to treat the mine water.Through single-factor and orthogonal tests,the effects of some factors,such as coagulants,coagulant aid content,pH values,stirring speed,and stirring time,on removing Zn2＋ in the mine water were studied and the best level of each factor was determined.The best synergistic effect can be achieved when the volume ratio of polyaluminium chloride（PAC） to polyacrylamide（PAM） is 2∶1,and the best treatment effect is obtained when the pH value is 9,the stirring speed is 80r·min^-1 and the stirring time is 10 min.The results of actual water treatment tests show that the removal rate of Zn2＋ reaches 93.9%,and the mass concentration of Zn^2＋ in the discharged water can meet the national emission standards of China.

关 键 词：矿坑水 废水处理 锌 混凝 沉淀 

分 类 号：X703.1[环境科学与工程—环境工程]