Abstract
An electrolytic silver recovery cell using three-dimensional electrodes and operated under galvanostatic and potentiostatic conditions is described. The influence of most important hydrodynamic (electrolyte flow rate and residence time) and electrochemical (current intensity and electrode potential) parameters on the concentration—time relationship and current efficiency is presented. A theoretical model assuming a batch recirculation system allows determination of the current efficiency as a function of the silver concentration inside the fixing bath's storage tank and is found to be in excellent agreement with experimental results. Concentrations of about 1 p.p.m can be obtained with satisfactory current yield and energy consumption.
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