Modelling of multicomponent reactive transport in finite columns - Application to gold recovery using iodide ligands

The proposed solution method is validated experimentally using existing tests of column leaching using iodine-based lixiviants. The obtained results show good agreement with the experimental data. In addition, the results indicate that the rate of effluent gold concentration increases until its maximum when the flow velocity, concentration of iodine lixiviants, or specific surface increase. After the peak, the behaviour is more complex and the obtained results allow to optimise the amount of recovered gold.