FIELD: removal of arsenic from sewage in non-ferrous and chemical industries. SUBSTANCE: method comprises removing arsenic by sorption thereof on iron hydroxide-based organomineral sorbent which comprises, wt %: iron hydroxide, 75-83 and perchlorovinyl, 17-25. Method makes it possible to carry out purification to permissible concentration level. EFFECT: simple and economical purification method. 2 ex, 1 tbl
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