P.J. Tauetsile, E.A. Orabya
Cyanide-starved alkaline glycine solutions have been shown to have distinct advantages in terms of lower reagent consumption and detoxification needs, or leach rate and recovery, over cyanide-only and glycine-only leach systems respectively for gold ores with nuisance copper. Activated carbon has been shown to be suitable for gold adsorption from alkaline glycine systems, and is well established for cyanide-based systems. This study aimed to investigate the equilibrium loading of gold and copper onto activated carbon from cyanide-starved alkaline glycine solutions. Adsorption efficiency was assessed through equilibrium loading isotherms, using a gold concentration of 2 ppm. The results indicated that while copper adsorption demonstrated variability, gold adsorption was consistent and conformed to the Freundlich isotherm model. Notably, the equilibrium gold loading capacity achieved in cyanide-starved glycine solutions was substantially higher than in pure cyanide systems, suggesting activated carbon's effectiveness as an adsorbent for gold removal. Specifically, an equilibrium gold loading of 9.95 kg Au/ton carbon was observed under specific conditions, emphasizing the potential for utilizing activated carbon in mixed glycine-cyanide leaching processes.
@article{560a4f35-7cd2-400c-b079-9da21012c135,
title={Activated carbon adsorption of gold from cyanide-starved glycine solutions containing copper. Part 1: Isotherms},
author={P.J. Tauetsile and E.A. Orabya},
year={2023},
language={en}
}TY - JOUR TI - Activated carbon adsorption of gold from cyanide-starved glycine solutions containing copper. Part 1: Isotherms AU - P.J. Tauetsile AU - E.A. Orabya PY - 2023 LA - en ER -
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