Abstract
Electrostatic shielding zones made of electrode graphite powder were used as a new type of ionic and electronic current sinks. Because of the local elimination of the applied electric field, voltage and current within the zones, ions are led inside them and accumulate there. We implemented the current sinks in electrodialysis of a simulated copper plating rinse water containing 100 mg L -1 Cu 2+ ions and electrodeionization of a 0.001 M CuSO4 solution with simultaneous electrochemical regeneration of the used ion exchange resin beds and obtained pure water with a Cu 2+ ion concentration of less than 0.12 mg L -1 at a flow rate of 1.29x10 -4 L s -1 diluate stream and a current density of 2 mA cm -2
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