Which type of filter effectively removes iron and manganese using a combination of adsorption and oxidation?

Which type of filter effectively removes iron and manganese using a combination of adsorption and oxidation?

• A. Sand filter
• B. Cartridge filter
• C. Greensand filter
• D. Bag filter

Answer: (C)

The Greensand filter is specifically designed to effectively remove iron and manganese from water through a combination of adsorption and oxidation processes. The greensand media is coated with manganese oxide, which promotes the oxidation of dissolved iron and manganese. Once oxidized, these metals form larger particles that can be trapped by the filter media through adsorption. This unique functionality makes the Greensand filter particularly suited for addressing issues of iron and manganese in water supplies. In contrast, other filter types like sand filters primarily serve to remove suspended solids and may not possess the chemical properties needed for the oxidation and adsorption of specific contaminants like iron and manganese. Cartridge filters and bag filters function similarly, typically utilizing physical filtration methods to remove particulates but do not incorporate the necessary chemical processes for effectively targeting iron and manganese.

The Greensand filter is specifically designed to effectively remove iron and manganese from water through a combination of adsorption and oxidation processes. The greensand media is coated with manganese oxide, which promotes the oxidation of dissolved iron and manganese. Once oxidized, these metals form larger particles that can be trapped by the filter media through adsorption. This unique functionality makes the Greensand filter particularly suited for addressing issues of iron and manganese in water supplies.

In contrast, other filter types like sand filters primarily serve to remove suspended solids and may not possess the chemical properties needed for the oxidation and adsorption of specific contaminants like iron and manganese. Cartridge filters and bag filters function similarly, typically utilizing physical filtration methods to remove particulates but do not incorporate the necessary chemical processes for effectively targeting iron and manganese.