Electrodialysis for The Desalination of Backwaters in Kerala

With the declining freshwater source and increase in demand for the potable water need of desalination have increased. The electrodialysis can be put as an economic substitute for the desalination of the brackish water. This paper deals with the assessment of the effect contaminants in the desalination of natural brackish water using electrodialysis. The contaminants studied were Boron, Sulfate and Magnesium in the presence of chloride. The study was based on the function of pH at a constant voltage of 11 V. Magnesium, Chloride, and Sulfate was not affected by the pH variations and was removed to an efficiency of 94%, 95%, and 74% respectively. But the boron was not removed in neutral pH and showed a removal efficiency of 41% at pH 10 in an hour. There was significant interference in the removal of the Chloride ion and Sulfate ion.