FIELD: non-ferrous metallurgy; treatment of domestic and industrial runoffs. SUBSTANCE: proposed method includes introduction of alkali neutralizing agent, mixing and settling for obtaining sediment repeatedly subjected to contact with the following portions of starting solution. Neutralizing agent is introduced to p=9-13 and sedimentation and settling are performed at temperature of 30-100 C. EFFECT: increased extraction of nickel at wide range of pH magnitudes; facilitated procedure. 2 dwg, 2 tbl, 2 ex
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