FIELD: header and draining sewage and underground water treatment. SUBSTANCE: crushed expanded argillite, with particles measuring 0.5 to 3.0 mm, is used as sorbent. It is successively treated with 6-% solution of sulfuric acid and 6-% solution of sodium or potassium hydroxide at a temperature of 60 C. Treatment is accomplished by the method of bubbling with subsequent washing with water. EFFECT: enhanced effectiveness of treatment and use of water for drinking purpose, cheapened process of treatment. 7 tbl
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