Abstract:Copper-citrate-thiosulfate solution is a green gold leaching system with potential application. Technological feasibility of adsorbing silver complex from citrate-thiosulfate solution with D301 ion exchange resin was studied. Effects of pH value of solution, concentration of citrate and thiosulfate, and nitrate on silver adsorption were investigated. The results show that adsorption of silver thiosulfate complex in resin is monolayer adsorption with uniform site, which conforms to the quasi-second-order adsorption kinetics. Both citric acid and nitrate inhibite the adsorption of silver thiosulfate ions. When the pH value of solution is greater than 12, the adsorption capacity of D301 resin for silver thiosulfate ions drops sharply. The results show that the speed control steps and the main influencing factors of the adsorption process are clear, which provides a theoretical and technical basis for the recovery of heavy metals and precious metals from thiosulfate-citric acid solution.