Catalytic role of ammonia in the anodic oxidation of gold in copper-free thiosulfate solutions

Hydrometallurgy

Volumn 77, Issue 3-4, 2005, Pages 287-293

  Senanayake, Gamini ^a  

^a MURDOCH UNIVERSITY   (Australia)

Author keywords

Ammonia; Gold oxidation mechanism; Speciation; Thiosulfate

Indexed keywords

ADSORPTION; ANODES; CATALYSIS; DESORPTION; DISSOLUTION; GOLD; OXIDATION; PH EFFECTS; SULFUR COMPOUNDS;

GOLD DISSOLUTION; GOLD OXIDATION MECHANISMS; SPECIATION; THIOSULFATES;

AMMONIA;

EID: 17444408115     PISSN: 0304386X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.hydromet.2004.12.003     Document Type: Article

References (15)

1. M.G. Aylmore, and D.M. Muir Thiosulfate leaching of gold-a review Miner. Eng. 14 2001 135 174
2. P.L. Breuer, and M.I. Jeffrey An electrochemical study of gold leaching in thiosulfate solutions containing copper and ammonia Hydrometallurgy 65 2002 145 157
3. J.J. Byerley, S.A. Fouda, and G.L. Rempel Kinetics and mechanism of the oxidation of thiosulphate ions by copper(II) ions in aqueous ammonia solutions J. Chem. Soc. Dalton Trans. 1973 889 893
4. I. Chandra, and M. Jeffrey Can a thiosulfate leaching process be developed which does not require copper and ammonia? C.A. Young A.M. Alfantazy C.G. Anderson D.B. Dreisinger B. Harris A. James Hydrometallurgy 2003 TMS Warrendale 169 182
5. J. Chen, T. Deng, G. Zhu, and J. Zhao Leaching and recovery of gold in thiosulfate based system-a research summary at ICM Trans. Indian Inst. Met. 49 1996 841 849
6. E. Hogfeldt Stability constants of metal-ion complexes, 2nd supplement, IUPAC chemical data series no. 2, Part A, Inorganic ligands 1982 Pergamon Oxford
7. D.M. Muir, S.R. LaBrooy, T. Deng, and P. Singh The mechanism of the ammonia-cyanide system for leaching copper-gold ores J.B. Hiskey G.W. Warren Hydrometallurgy: fundamentals, technology and innovation 1993 A.I.M.E. Warrendale 192 204
8. A.M. Pedraza, I. Villegas, and P.L. Freund Electro-oxidation of thiosulfate ion on gold J. Electroanal. Chem. 250 1988 443 449
9. G. Senanayake Gold leaching in non-cyanide lixiviant systems: critical issues on fundamentals and applications Miner. Eng. 17 2004 785 801
10. G. Senanayake Analysis of reaction kinetics, speciation and mechanism of gold leaching and thiosulfate oxidation by ammoniacal copper(II) solutions Hydrometallurgy 75 2004 55 75
11. G. Senanayake Fundamentals and applications of metal-ligand complexes gold(I/III) in non-cyanide gold processes Proc. green processing 2004, 2nd international conference on sustainable processing of minerals 2004 Australas. Inst. Min. and Metall Melbourne 113 122
12. - ion-pair Hydrometallurgy 2005 (in press)
13. Z. Zhang, and M.J. Nicol An electrochemical study of the dissolution of gold in thiosulfate solutions. Part I: Alkaline solutions J. Appl. Electrochem. 33 2003 767 775
14. X.M. Zhang, G. Senanayake, and M.J. Nicol A study of the gold colloid dissolution kinetics in oxygenated ammoniacal thiosulfate solutions Hydrometallurgy 74 2004 243 257
15. G. Zhu, Z. Fang, and J. Chen Electrochemical studies on the mechanism of gold dissolution in thiosulfate solutions Trans. N.F. Soc. 4 1994 50 53