采用一系列过滤步骤将铁（Fe）和锰（Mn）分离为可溶性、胶体和颗粒组分。两个案例研究证明了分馏数据如何提高对铁和锰的来源和去除的理解。研究表明，一个水源中的锰物种受生物地球化学循环的调节，其中锰的自然氧化和还原似乎是由微生物介导的。通过调整高锰酸钾的施用量来解释这一循环，锰的去除得到了改善。一家地下水处理厂的过滤后铁和锰浓度很高。分馏数据表明，问题在于固体捕获不足，而不是氧化剂的用量，从而导致快速解决。 锰与氯（Cl2）的意外氧化归因于铁氧化物的表面催化作用。如果颗粒去除不充分（不添加混凝剂），在过滤器顶部添加Cl2比在滞留池之前添加Cl2表现出更好的去除效果。包括15个参考文献、表格和图表。

A series of filtration steps was used to separate iron (Fe) and manganese (Mn) into soluble, colloidal, and particulate fractions. Two case studies demonstrate how fractionation data can improve understanding of the origins and removal of Fe and Mn. The Mn species present in one water source were shown to be regulated by a biogeochemical cycle in which the natural oxidation and reduction of Mn appeared to be microbially mediated. Mn removal was improved by adjusting the application of potassium permanganate to account for this cycle. A groundwater treatment plant was suffering from high postfilter Fe and Mn concentrations. Fractionation data identified the problem as inadequate solids capture, not oxidant dosage, allowing a quick solution. The unexpected oxidation of Mn with chlorine (Cl2) was attributed to Fe oxide surface catalysis. Without adequate particle removal (no coagulant added), applying Cl2 on top of the filters exhibited superior removal to adding Cl2 before a detention basin. Includes 15 references, tables, figures.