Abstract
This review is devoted to an integrated evaluation of the current use and future development of the resin adsorption technique in gold recovery from pregnant thiosulfate solutions. Comparisons are firstly made with other recovery techniques, including precipitation, activated carbon adsorption, solvent extraction, electrowinning and mesoporous silica adsorption. A detailed discussion about the recent advances of the technique in gold recovery from pregnant thiosulfate solutions is then presented from the aspects of gold adsorption on the resins and gold-loaded resin elution, respectively. On the basis of summarizing the present research, the major limitations of the resin adsorption technique are eventually pointed out and future development will also be prospected.
Highlights
Cyanide leaching has been used to leach gold from ores for more than a century because of its simple process, high efficiency and low cost
Thiosulfate leaching offers the advantages of non-toxicity, low reagent costs, fast leaching rate and good performance in treating certain refractory gold ores, and has been widely accepted by researchers as the most promising non-cyanide technique to replace conventional cyanidation [2,3]
The copper can be selectively pre-eluted with the solutions of oxygenated ammonia, ammonia-ammonium sulfate, ammonium thiosulfate, etc. and this paper mainly concentrates on the elution of gold based on different elution principles
Summary
Cyanide leaching has been used to leach gold from ores for more than a century because of its simple process, high efficiency and low cost. These studies have indicated that resin adsorption is more suitable compared with other recovery techniques, including precipitation, activated carbon adsorption, solvent extraction, electrowinning and mesoporous silica adsorption
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