Journal article
Kinetic model for anodic oxidation of gold in thiosulfate media based on the adsorption of MS2O3− ion-pair
Hydrometallurgy, Vol.76(3-4), pp.233-238
2005
Abstract
It has been the general practice amongst researchers to use the molar concentration of thiosulfate salts to be the same as that of S2O 3 2- ions involved in various equilibrium or rate expressions for interpreting gold oxidation kinetics. However, chemical speciation analysis based on the association of thiosulfate ion with monovalent cations (ion-pair formation) shows that the concentration of free S 2O3 2- ions is lower than that of associated MS2O3 - ions (M=Na, K, NH4). Analysis of literature data on electrochemical oxidation rates of gold in non-ammoniacal alkaline sodium thiosulfate solutions based on the adsorption of NaS 2O3 - shows that the rate constant for gold oxidation is 4.2×10-4 mol m-2 s-1.
Details
- Title
- Kinetic model for anodic oxidation of gold in thiosulfate media based on the adsorption of MS2O3− ion-pair
- Authors/Creators
- G. Senanayake (Author/Creator) - Cooperative Research Centre
- Publication Details
- Hydrometallurgy, Vol.76(3-4), pp.233-238
- Publisher
- Elsevier BV
- Identifiers
- 991005546323807891
- Copyright
- © 2004 Elsevier B.V.
- Murdoch Affiliation
- Parker Cooperative Research Centre for Integrated Hydrometallurgy Solutions
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 7 Engineering & Materials Science
- 7.229 Mineral & Metal Processing
- 7.229.774 Bioleaching
- Web Of Science research areas
- Metallurgy & Metallurgical Engineering
- ESI research areas
- Materials Science