Recovery of silver from thiosulfate and thiocyanate leach solutions by adsorption on anion exchange resins and activated carbon

The investigation focuses on the recovery of silver from hydrometallurgical leach residues of lead–zinc sulfide concentrates using non-cyanide reagents — sodium thiosulfate and potassium thiocyanate. The adsorption of silver from these leach solutions was carried out with a number of anion exchangers and carbon adsorbents, distinguished from each other by their physical structure and functional groups. It is shown that the strong base anion exchanger AV-17-10P and the carbon adsorbent LK-4 based on anthracite, possess the best sorption properties and can be recommended for hydrometallurgical processing.