METHOD FOR PRODUCING FILTERING MATERIAL INTENDED TO REMOVE MANGANESE IONS FROM WATER Russian patent published in 1997 - IPC

FIELD: water treatment; production of sorbents; demanganizing treatment of drinking water and sewage. SUBSTANCE: proposed method resides in subjecting natural zeolite to treatment first with divalent manganese salt solution until 0.090-0.130 wt.% manganese (II) is introduced into exchange zeolite complex based on total zeolite weight, and next to treatment with potassium permanganate solution, in presence of alkali metal salt taken in concentration 1-2 wt. %. EFFECT: resulting filtering material effectively removes manganese (II) ions from water; reactants consumption for producing material is reduced by 180-2000 times. 2 cl, 8 tbl