The effect of lead and some operating parameters on cathode contamination during zinc electrowinning
By Safizadeh, F.; Su, C.; Ghali, E.; Houlachi, G.
Published in Hydrometallurgy
NULL
2017
Abstract
Abstract The influence of various operating parameters such as lead concentrations as impurity, current density, acid concentration and temperature was investigated in acid zinc sulfate electrolyte. Nucleation overpotential (NOP) for various experimental conditions was determined using cyclic voltammetry technique. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Inductively coupled plasma (ICP) were employed to study the physical and chemical characteristics of zinc deposits. By adding lead to the electrolyte, the current efficiency (CE) was changed from 94.04% for the electrolyte without lead to 95.37% for the solution containing 0.2 mg L? 1 Pb (1.33% increase). However, in the presence of higher lead concentrations (0.2
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