化工环保Issue(1)：47-52,6.DOI:10.3969/j.issn.1006-1878.2016.01.010
分步沉淀法处理酸性矿山废水
Treatment of acid mine drainage by fractional precipitation process
摘要
Abstract
The acid mine drainage(AMD)was treated by fractional precipitation process. The effects of the process conditions on recover of valuable metals from AMD were studied. The experimental results show that:Ca(OH)2 is the suitable agent for pH adjustment;When the wastewater pH is adjusted to about 4.00 and 0.05 mL/L of H2O2 is added,Fe2+and Fe3+are firstly removed from the wastewater and the iron-rich sludge with 51.00%of w(Fe)is obtained;Then the wastewater pH is adjusted to 6.00-6.50,with the addition of 50 mg/L Na2S,Cu2+is removed from the wastewater and the copper-rich sludge with 10.89%of w(Cu)is obtained,and with the addition of 100 mg/L Na2S,Zn and Mn are removed from the wastewater and the zinc-manganese-rich sludge with 2.37%of w(Cu),6.79%of w(Mn),1.61%of w(Pb)is obtained;Finally,when the wastewater pH is adjusted to 8.40,the rest Zn,Mn and other heavy metals are removed. After treated by fractional precipitation process,the effluent quality can meet the national discharged standard,and the iron-rich sludge,copper-rich sludge and zinc-manganese-rich sludge can be sold directly or reused. The popularization and application of the fractional precipitation process is worthily because that the cost of AMD treatment could be reduced significantly with the recovery of valuable metals.关键词
酸性矿山废水/分步沉淀/有价金属/资源回收Key words
acid mine drainage/fractional precipitation/valuable metal/resource recovery分类
资源环境引用本文复制引用
王明辉,晏波,麦戈,陈涛,肖贤明..分步沉淀法处理酸性矿山废水[J].化工环保,2016,(1):47-52,6.基金项目
广东省科技计划项目（2014B090901040，2014B030301060）；广东省省级环保专项资金项目（粤财工2014-176号）。 （）
