Abstract
In the present study, direct electrowinning is adopted for the recovery of antimony and bismuth from a quaternary chloride electrolyte that depicts the spent electrolyte from copper extraction. Reduction behavior of metal ions in electrolytes was studied using linear sweep voltammetry. Electrowinning of antimony and bismuth was carried out under potentiostatic and galvanostatic conditions. Electrodeposition parameters such as current density, potential, and temperature were systematically varied to understand their effect on the recovery of antimony and bismuth. The recovered metals are characterized for their composition and phase purity using XRF, XRD and surface morphology by SEM. By careful choice of conditions, it is possible to recover bismuth and antimony from the chloride bath. At a potential of −0.5 V as well as at a current density of 5 A/dm2, antimony rich deposits can be obtained at ambient bath temperatures.
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