可溶性锰（Mn（II））氧化为不溶性二氧化锰（MnOx（s））的过程已经相当清楚；然而，氢氧化铁/氧化物（Fe（OH）3（s））在催化游离氯（HOCl）等氧化剂氧化锰（II）中的作用是氧化除锰的一个具体方面，需要进一步研究。这一问题对地下水和表面处理系统的整体性能都有重大影响，这些系统采用除铁除锰的方法。文献来源表明，HOCl对Mn（II）的整体溶液氧化非常缓慢。之前的研究人员已经注意到，在自然水系统中，在金属氧化物表面（包括铁）存在的情况下，Mn（II）通过分子氧催化氧化，但这种现象在水处理条件下可能提供的优势尚待研究。 本文着重讨论了这种强化氧化的机械方法，收集的数据支持以下结论:氧化铁表面在催化溶液中可溶性锰的氧化中起着重要作用，反应高度依赖于溶液pH、HOCl浓度和氧化铁浓度。

The oxidation of soluble manganese (Mn(II)) to insoluble manganese dioxide (MnOx (s)) is fairly well understood; however, the role of ferric hydroxide/oxides (Fe(OH)3 (s)) in catalyzing the oxidation of Mn(II) by oxidants such as free chlorine (HOCl) is one specific aspect of manganese removal via oxidation that requires further investigation. This issue has a significant impact on the overall performance of both groundwater and surface treatment systems that practice iron and manganese removal. Literature sources indicate that bulk solution oxidation of Mn(II) by HOCl is extremely slow. Previous researchers have noted catalyzed oxidation of Mn(II) via molecular oxygen in the presence of metal oxide surfaces including iron in natural water systems, but the possible advantages this phenomenon may offer under water treatment conditions have yet to be investigated. This paper focuses on mechanistic means by which this enhanced oxidation and the data collected support the following conclusions: iron oxide surfaces play a significant role in catalyzing the oxidation of soluble manganese in solution and the reactions are highly dependent upon solution pH, HOCl concentration, and iron oxide concentration.