Manganese Sand Filtration Manganese sand is widely used in the water supply industry, is a special filter material in water filtration which is crushed, screened by machine. The appearance is mahogany, multi-edges or nearly spherical. Manganese sand commonly is used in the removal of iron and manganese from groundwater filtration, especially can eliminates iron best. Technical parameters : Analysis project MnO2 Density Bulk density Mn Result 25-35 3.5g/cm3 2.4g/cm3 18-25% Analysis project SiO2 Fe Mn C Ash Content Result 16-20 8-19% 12-22% max3%