An effective separation of toxic arsenic from aquatic environment using electrochemical ion exchange process

Abstract

The existence of arsenic in drinking water available for human consumption in multiple nations is among the major health issues globally. Intensified research efforts has made to eradicate arsenic contaminants from water in order to supply people who are living in multiple regions with safe drinking water. A novel process for the deletion of arsenic from aqueous solutions by the electrochemical ion exchange hybrid method were explored in this work. The paper aims to extract arsenic from aqueous solution and recycle it using an electrochemical ion exchange system for industrial purposes. A 3-compartment system was used to demonstrate this process: the center cell is separated from the anodized and cathodic chambers by means of double anionic exchange membrane, a middle cell packed with a strong anion exchange resin, and two rinse compartments, one at each electrode. Efforts are being made to illustrate the optimization of the operating parameters, including concentration, resin dose, pH, contact time, temperature for optimal arsenic removal in batch mode operation. The maximum removal of arsenic obtained is almost 100% and a minimum of 91% extraction at an initial intensity of 5-15 mg /L of arsenic with supply voltage in the 5-20 V range.

Keywords: Anionic exchange membranes; Arsenic; Electro dialysis; Electrochemical Ion exchange; Ion exchange.