ABSTRACT Limestone leaching beds are used in passive treatment systems to remove Mn(II) from mine drainage. Removal typically involves a combination of biotic and abiotic mechanisms. Six laboratory scale reactors were set up to examine the relative importance of different removal mechanisms of Mn. Duplicate reactors contained limestone, limestone with pyrolusite, and quartz. Acid mine drainage (AMD) containing 2 mg/l Mn, 0.3 mg/l Zn, and 0.08 mg/l Ni was fed in two streams to the duplicate sets of reactors, one stream was treated with biocide. Removal of Mn by limestone alone is minimal, and is enhanced by the presence of pyrolusite in a reactor. The most effective removal of Mn was achieved in the biotic limestone reactors, and microbial Mn (II) oxidation appears to be important for optimal removal of Mn from solution. Ni and Zn removal appeared coupled to Mn removal, likely due to their sorption onto Mn oxide surfaces.

中文翻译：

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使用石灰石浸出床从新西兰煤矿排水中去除锰和微量元素

摘要 石灰石浸出床用于被动处理系统以去除矿山排水中的 Mn(II)。去除通常涉及生物和非生物机制的组合。建立了六个实验室规模的反应器来检查不同锰去除机制的相对重要性。重复的反应器包含石灰石、石灰石和软锰矿，以及石英。含有 2 mg/l Mn、0.3 mg/l Zn 和 0.08 mg/l Ni 的酸性矿井排水 (AMD) 以两股流加入到双组反应器中，一股流用杀生物剂处理。仅通过石灰石去除 Mn 的作用很小，并且通过反应器中软锰矿的存在而增强。在生物石灰石反应器中实现了最有效的 Mn 去除，微生物 Mn (II) 氧化似乎对于从溶液中最佳去除 Mn 很重要。