Mining, Minerals Processing and Metallurgical Engineering

Thiosulfate leaching of gold: A review on novel catalytic systems

Expand
  • a School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China;

    b Changsha Research Institute of Mining and Metallurgy Co., Ltd., Changsha 410012, China;

    c College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, China

Online published: 2026-05-13

Abstract

Eco-friendly thiosulfate is a promising alternative to the high-toxic cyanide for gold extraction with copper− ammonia catalytic system being the most popular. However, the copper−ammonia catalysis causes the issues of high thiosulfate consumption, complex gold recovery process and ammonia pollution. An effective strategy to tackle these issues is to improve or replace the copper−ammonia system with a novel catalytic system (NCS). Various NCSs are classified and their current status and future prospectives are reviewed. The critical constituent factors of NCSs are summarized. The noteworthy developing trends of potential NCSs are also discussed. Furthermore, besides resin adsorption, other recovery methods such as solvent extraction deserve more attention to achieve selective gold recovery. Crucial insights into developing suitable NCSs to solve the existing challenges in the current thiosulfate leaching technology once and for all are offered, thus promoting its large-scale industrial application.

Cite this article

Qian LI, Yue-hong ZHU, Yan ZHANG, Xiao-liang LIU, Shu-yi QIAO, Yong-bin YANG, Tao JIANG . Thiosulfate leaching of gold: A review on novel catalytic systems[J]. Transactions of Nonferrous Metals Society of China, 2026 , 36(4) : 1294 -1319 . DOI: 10.1016/S1003-6326(25)67032-4

Outlines

/