Removal of iron and nickel from solutions by application of electrical fields

摘要

Metallic impurities such as Ni Fe, Cu ions in chromium plating solutions can be removed by electromigration followed by electrodeposition or coagulation using a porous pot, suspended in the bath and containing a lead cathode. In the same process, Cr(III) is oxidized to Cr (VI) at the insoluble lead anode leading to regeneration of the plating solution. Previous research and data from industrial operations have indicated the "porous pot" method could be a cost-effective and environmentally friendly method to continuously separate impurities and recycle spent chromium solutions.