FILTERING MATERIAL FOR TREATMENT OF WATER FROM MANGANESE AND IRON, METHOD FOR IT PREPARING AND METHOD FOR TREATMENT OF WATER FROM MANGANESE AND IRON Russian patent published in 2006 - IPC C02F1/64 B01D39/06 B01J20/06 B01J20/30 C02F103/04 

FIELD: filtering materials, water treatment.

SUBSTANCE: invention relates to methods for preparing drinking water, namely to purification of water from manganese and iron and can be used in additional treatment of well-drilling water. Filtering material used in treatment of water from Mn and Fe comprises as a base the natural granular material with catalytically active layer formed on a base wherein catalytically active layer consists of a mixture of oxides MnO, Mn₂O₃ and MnO₂ in their mass ratio = (5-6):(3-2):(2-1), respectively. This material is prepared by treatment of a base with reagent solution containing manganese salts and treatment is carried out successively with at least solutions of two reagents. Firstly, treatment is carried out in Mn (II) salt solution and then with potassium permanganate followed by additional treatment with reagent solution reducing Mn (VII) and providing the formation of a mixture of manganese oxide compounds on surface of granular material. Method for water treatment from manganese and iron involves passing water through a filtering material layer with catalytically active layer comprising a mixture of oxides MnO, Mn₂O₃ and MnO₂. Method provides effective removal of manganese and iron from well-drilling and tap water, it doesn't require the preliminary treatment of water with oxidant and provides the possibility for regeneration of the filtering material also.

EFFECT: valuable properties of filtering material, improved preparing method.

14 cl, 7 tbl, 5 ex