Removal of Chloride Ions from an Aqueous Solution Containing a High Chloride Concentration through the Chemical Precipitation of Friedel's Salt

Abstract

This study explored the feasibility of removing chloride ions from an aqueous solution containing a high chloride concentration through the chemical precipitation of insoluble Friedel's salt, which was triggered by the addition of calcium and aluminum compounds. Calcium hydroxide (Ca(OH)2) and sodium aluminate (NaAlO2) were used as the reagents. Key factors for the removal of chloride ions, including the dosage of the reagents, reaction temperature, reaction time, initial pH, and initial chlorine concentration, were investigated.