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- Title
Modeling Equilibrium Constants of Multiple Components in Non-Ammoniacal Resin-Solution Systems.
- Authors
Muslim, Abrar
- Abstract
Since thiosulfate leaching has been applied as an alternative leaching to cyanidation in gold extraction, the adsorbent of strong based anion exchange resin has been investigated for the adsorption of thiosulfate, polythionates and gold thiosulfate. Anion exchange resin simultaneously adsorbs thiosulfate, polythionates and gold thiosulfate, and each component competes one another in multiple components of non-ammoniacal resin solution systems. The aim of this work is to develop equilibrium constant models for multiple components in the systems. Experimental work were conducted to obtain equilibrium constants associated with the complex reaction in the systems, and compared the values to the ones based on the proposed model. As the modeling results, the equilibrium constant for trithionate over thiosulfate and tetrathionate over trithionate was computed to be approximately 90.739 and 1.482, respectively which was in a good agreement with the experimental result. The model-based equilibrium constant for gold thiosulfate over trithionate was obtained to be 0.469 with the correlation coefficient, R2 being 0.9874. In addition, this work also proposed a model reaction mechanism to obtain the equilibrium constant for gold thiosulfate over tetrathionate with the model-based equilibrium constant being approximately 0.317.
- Subjects
ADSORPTION (Chemistry); EQUILIBRIUM constant (Chemistry); THIOSULFATES; LEACHING; GOLD mining; MATHEMATICAL models
- Publication
International Review of Chemical Engineering - Rapid Communications, 2012, Vol 4, Issue 1, p65
- ISSN
2035-1755
- Publication type
Article