共存阳离子对含锰酸性矿山废水化学中和处理过程的影响

文章采用化学中和法处理模拟酸性矿山废水（acid mine drainage，AMD），探究共存离子 $ Fe^{2+} $、 $ Mg^{2+} $ 和 $ Al^{3+} $ 在曝气搅拌和机械搅拌 2 种条件下对锰的去除率及其固相产物的影响。结果表明：3 种共存离子对锰的去除均具有一定的促进作用；其中 $ Al^{3+} $ 的作用最显著，但 $ Al^{3+} $ 及其产物对锰离子的氧化有抑制作用； $ Al^{3+} $、 $ Fe^{2+} $ 的存在会降低固相产物中锰元素的质量比并影响沉积物组成，不利于后续回收处理。研究结果可为化学中和除锰工艺优化及固相产物回收利用研究提供参考。

In this paper, the chemical neutralization method was used to treat simulated acid mine drainage (AMD). The effects of coexisting ions $ Fe^{2+} $, $ Mg^{2+} $ and $ Al^{3+} $ on the removal rate of manganese and its solid phase products were investigated under aeration agitation and mechanical agitation. The results show that the three coexisting ions can promote the removal of manganese to some extent. The effect of $ Al^{3+} $ is the most significant, but $ Al^{3+} $ and its products inhibit the oxidation of manganese ions. The presence of $ Al^{3+} $ and $ Fe^{2+} $ will reduce the content of manganese in the solid phase products and affect the sediment composition, which is not conducive to subsequent recovery and treatment. The results can provide reference for the optimization of chemical neutralization and removal of manganese and the recovery and utilization of solid phase products.