碳钢渣处理煤矿酸性废水及其去除机理

Carbon Steel Slag Treatment of Acid Mine Drainage and Its Removal Mechanism

根据阳泉市山底河流域煤矿酸性废水的特点配制了低pH值、高Fe^(2+)和Mn^(2+)质量浓度的煤矿酸性废水,利用碳钢渣对其进行处理,研究了碳钢渣对去除率的影响因素,并且着重探讨了去除机理。结果表明:碳钢渣对Fe^(2+)去除率最高可达98.72%,对Mn^(2+)的去除率最高仅为39.79%;处理煤矿酸性废水后碳钢渣表面生成了新物质Fe(OH)_(3),但没有生成含Mn的新物质,证明碳钢渣对Fe^(2+)的去除以化学反应为主,对Mn^(2+)的去除以吸附作用为主。

According to the characteristics of acid mine drainage in the Shandi River Basin of Yangquan City,acid mine drainage with low pH value and high Fe^(2+)and Mn^(2+)concentration was prepared.Carbon steel slag was used to treat it,so as to investigate the factors influencing the removal rate and discuss the removal mechanism.The results show that the removal rate of Fe^(2+)by steel slag is as high as 98.72%,and the removal rate of Mn^(2+)is only 39.79%.After the treatment of acid mine drainage,Fe(OH)_(3)is produced on the surface of steel slag,but no new Mn-containing substances are produced,which proves that the removal of Fe^(2+)is dominated by chemical reactions,and the removal of Mn2+is dominated by adsorption.