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Remediation/Treatment
Ion and ionic current sinks for electrodeionization of simulated cadmium plating rinse waters
Article first published online: 15 APR 2010
DOI: 10.1002/ep.10438
Copyright © 2010 American Institute of Chemical Engineers (AIChE)
Additional Information
How to Cite
Dermentzis, K., Christoforidis, A., Papadopoulou, D. and Davidis, A. (2011), Ion and ionic current sinks for electrodeionization of simulated cadmium plating rinse waters. Environ. Prog. Sustainable Energy, 30: 37–43. doi: 10.1002/ep.10438
Publication History
- Issue published online: 15 APR 2010
- Article first published online: 15 APR 2010
- Abstract
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Keywords:
- cadmium removal;
- membrane-less electrodialysis;
- Faraday cage;
- electrostatic shielding;
- water reuse
Abstract
In this study, electrostatic shielding zones made of electrode graphite powder were constructed and 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 these zones, ions are led inside them and accumulate there. The current sinks were implemented in electrodeionization of simulated cadmium plating rinse waters containing 50 mg/L of Cd2+ ions with simultaneous electrochemical regeneration of the ion exchange resin beds. Pure water was obtained with a Cd2+ ion concentration of less than 0.1 mg/L at a flow rate of 3.27 × 10−4 L/s diluate stream, a current density of 2 mA/cm2, and a current efficiency of 28% for Cd2+ ion removal. © 2010 American Institute of Chemical Engineers Environ Prog, 2011