LAUSR

ABSTRACT This study was undertaken to enhance the selectivity and the removal efficiency of Cd2+ from a mixture solution containing Cd2+ and Na+ using continuous electropermutation (EP) with alginate-modified resin (MR). The surface of the MR was characterized via scanning electron microscopy and Fourier transform infrared. The use of the MR in EP process has improved the efficiency and the selectivity for Cd2+ removal from Cd2+ (88, 46%), Na+ (81, 41%) to Cd2+ (96, 98%), Na+ (51, 47%). The effect of current density and concentration of the electro-regeneration electrolyte on the Cd2+ removal efficiency was investigated. Abbreviations AEM, anion-exchange membrane; AG, alginate; CEM, cation-exchange membrane; DS, desorption solution; DVB, divinylbenzene; EDI, electrodeionization; ED, electrodialysis; EP, electropermutation; ERE, electroregeneration electrolyte; FTIR, Fourier transforms infrared; IER, ion-exchange resins; LG, glucuronic acid; MR, modified resin; SEM, scanning electron microscopic; UMR, unmodified resin; DM, D-mannuronic.