Author: Polvanov, Sardor Komilovich; Xamidov, Rustam Abdugafurovich; Ikromidinova, O‘g‘iloy O‘ktam qizi;

Annotation: The article investigates the technology for extracting silver and nickel based on the processing of sulfuric acid waste solutions generated during sorption and regeneration processes. The study focused on solutions formed during the acid treatment of anionites saturated with precious and non-ferrous metals. The cementation method was used for silver recovery, with zinc powder, iron, and aluminum considered and compared as precipitating reagents. According to the experimental results, zinc powder showed the highest efficiency, with the silver recovery rate exceeding 90%. After silver extraction, the possibility of nickel recovery from the remaining solutions was evaluated using various precipitating reagents, and sodium hydroxide was selected as the technologically and economically optimal reagent. The obtained results justify the feasibility of the comprehensive processing of sulfuric acid waste solutions and the recovery of precious and non-ferrous metals as an additional resource.

Keywords: silver, nickel, waste solutions, cementation, zinc powder, sulfuric acid, precipitation, regeneration, precious metals, hydroxides

Pages in journal: 264 - 277