Effect of feed characteristics on the separation performances of monovalent and divalent salts by electrodialysis

In this study, separation performance for monovalent salts (NaCl, KCl) and divalent salts (CaCl2 MgCl2) was investigated by electrodialysis at pH 6.0-6.5, 4.0 and 2.0 using constant voltage mode of operation. TS-1-10 electrodialysis equipment (Tokuyama) modified with rotameters was employed in experimental studies. The effect of electrical potential, pH and ion valency on separation performance was studied at room temperature using a constant flow rate. The efficiencies of each run were evaluated as specific power consumption with the electrical energy consumed only in stack.