Transport phenomena in a hybrid ion exchange-electrodialysis

What is it about?

Investigation of Transport Phenomena in a Hybrid Ion Exchange-Electrodialysis System for the Removal of Copper Ions. Hybrid ion exchange electrodialysis processes allow the removal of metal ions from dilute waste liquids and the recovery of more concentrated solutions. The work reported here was aimed at investigating the two steps in the treatment process, namely, adsorption of metal ions onto the packed bed of resin and electromigration (i.e., the transport of these ions in the complex system under the applied electrical field). The case of copper sulfate was investigated. Dowex™ resins with a cross-linking degree of 2 and 8% were used. The flux of copper through the resin bed and the current efficiency for ion transfer to the cathode compartment were determined as a function of potential gradient and copper ionic fraction in the bed. Apparent diffusion coefficients of Cu2+ in the overall system were deduced from the experimental data. Journal of Applied Electrochemistry October 2003, Volume 33, Issue 10, pp 875–884. DOI: http://dx.doi.org/10.1023/a:1025859610756

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