Efficiency of the electrodialysis technique for the removal of cadmium and cyanide from galvanic industry wastewaters

Yasser Hannachi, Aymen Hannach

Abstract

This study deals with the removal of cadmium and cyanide from galvanic industry wastewaters.The use of the electrodialysis technique for the treatment of a synthetic wastewater containing approximately 0.0089molL-1 cadmium and 0.086 mol L-1 cyanide was studied using a five-compartment electrodialysis cell. The extraction of cadmiumand cyanide depends on the applied current density and it is limited by the precipitation of cadmium on the cation-exchange membrane in the diluate central cell compartment.