Removal of Heavy Metals from Water by Electrodialysis in the Presence of Acids and Salts
نویسنده
چکیده
The use of electrodialysis to remove cadmium from water has been shown to be feasible for a wide range of conditions. As much as three orders of magnitude reduction in the concentration of cadmium was observed for the feed with the concentrate stream from the process containing cadmium concentrations greater than 100,OOO ppm. The effect of cadmium concentration, pH, and added sodium chloride concentration on the overall current efficiency, apparent stack resistance, and the osmotic water transfer is discussed. Under many conditions, linear mixing rules can describe important parameters when complex mixtures of electrolytes are being electrodialy zed.
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Exploring the Potential of Electrodialysis
Electrodialysis is an electrochemical membrane separation technique for ionic solutions that has been used in industry for several decades. It can be used in the separation and concentration of salts, acids, and bases from aqueous solutions, the separation of monovalent ions from multivalent ions, and the separation of ionic compounds from uncharged molecules. It can be used for either electrol...
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