FIELD: water treatment. SUBSTANCE: filter medium for treating natural- origin drinking water and trade waste waters contains, wt %: mining production final tailings calcined for 5-6 h at 800 C, 50-60; liquid glass, 38.25-47.9; and sodium silicate-fluoride, 1.79-2.1. Final tailings contain ~ 38% Fe and ~36% S. EFFECT: facilitated deironing of water and increased its alkalinity. 2 cl, 1 dwg, 3 tbl
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