INVESTIGATION OF OPTIMUM PARAMETERS FOR RECOVERING COPPER METAL FROM ELECTRONIC CIRCUIT BOARD MUD BY ELECTROLYSIS IN AMMONIA SOLUTION

Abstract

The electric circuit board waste has a high content of Cu (19.5%), which has high value, need to be recovered. Electrolysis method is preferred because of its environmental friendliness and lower cost. The objective of the study was to determine the optimum parameters for copper recovery from electric circuit board waste by electrolysis method in alkaline ammonia medium. The results have been obtained as follows: The extraction solution gave the pH (9.5 ± 0.5), the content of Cu²⁺ (7.5 ± 0.2)g /L, the content of Cl^- (7.7 ± 0.2) g/L; the optimal parameters of copper recover process were the distance of anode and cathode (25 mm), the current density (280 A/m²), the stirring speed (200 rpm), the recover process suited first-order kinetic model with a speed constant of 0.018 /min.

Keywords: Current density, current efficiency, copper recovery, recover efficiency.