J.L. Broadhurst, J.G.H. du Preez
This study investigates the thermodynamics of gold dissolution in an acidic aqueous thiocyanate medium with iron(III) sulphate as an oxidant. The primary objective is to elucidate the complex chemistry involved and to predict the feasibility and optimal conditions for gold leaching operations. To achieve this, species distribution and pH–potential diagrams were constructed based on previously published thermodynamic data, considering the expected pH and concentration ranges relevant to practical leaching processes. The methodology employed includes the calculation of free species concentrations using the Newton-Raphson method and the Nernst equation, supplemented with computational algorithms for enhanced accuracy. Key results show the formation of various chemical species and their stability within the leaching environment, offering insights into significant factors that affect gold recovery. The findings provide a comprehensive understanding of the interactions within the gold/iron/thiocyanate/sulphate/water system, contributing to improved leaching strategies in hydrometallurgy.
@article{e11098e9-2882-43a9-965e-6145f1cefd30,
title={A thermodynamic study of the dissolution},
author={J.L. Broadhurst and J.G.H. du Preez},
year={2026},
language={en}
}TY - JOUR TI - A thermodynamic study of the dissolution AU - J.L. Broadhurst AU - J.G.H. du Preez PY - 2026 LA - en ER -
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