Filter Medias: Iron Removal
MTM®. Clack MTM is a granular manganese dioxide filtering media used for reducing iron and manganese from water. Its active surface coating oxidizes and precipitates soluble iron and manganese. The precipitates are filtered out in the granular bed and removed by backwashing. MTM consists of a light weight granular core with a coating of manganese dioxide. The coating provides an example of contact filtration where the media itself provides the oxidizing potential. When the oxidizing power of MTM is reduced, the bed has to be regenerated with a weak solution of potassium permanganate (KMnO1), thus restoring its oxidation capacity. Works best with waters that have a pH value of 7.0 or higher.