What type of filter combines adsorption and oxidation to remove iron and manganese?

Manganese greensand filters are specifically designed to remove iron and manganese from water through a combination of adsorption and oxidation processes. The greensand media, which is coated with manganese oxide, facilitates the oxidation of dissolved iron and manganese into particulate forms that can then be physically removed by the filtration process.

When water containing iron and manganese passes through the manganese greensand, the manganese oxide coating reacts with these metals, converting them from soluble to insoluble forms. This conversion allows the particulate metals to be trapped within the filter material, effectively removing them from the water supply.

In contrast, activated carbon filters primarily focus on adsorbing organic compounds and chlorine rather than targeting iron and manganese. Sand filters can remove larger particulates but do not have the capability for oxidation or specific removal of iron and manganese. Polymer filters are typically used to remove particulates and certain chemicals but do not offer the same oxidation and adsorption properties for iron and manganese as manganese greensand filters do. Thus, manganese greensand filters are uniquely suited for the specific challenge of iron and manganese removal in drinking water.