Application of Ion Exchange Resins to Reduce Hardness, Corrosion and Scaling of Drinking Water

In this research, the performance of strong cationic Purolite C-۱۰۰ Na+, Ambersep IR۲۵۲ H+,Amberlite IR۱۲۰ H+ ion exchange resins and an IRA۴۰۲ OH- anionic resin have investigated to the reduction of hardness and TDS of drinking water in Bushehr, Iran. Also, to demonstrate the efficiency of these resins, the experimental variables affecting the ion exchange process such as contact time and adsorbent consumption were investigated. The results showed that the maximum adsorption capacity in the best operating condition was ۴۸.۰۱, ۴۵ and ۳۶.۰۱ mg.g-۱ for Purolite, Ambersep, and Amberlite resins, respectively. The maximum percentage of total hardness reduction parameters, calcium and magnesium ions reduction at best operating condition was ۹۰.۰۸۶ %, ۹۳.۰۸۵ %, ۷۷.۲۷ % for Purolite ion exchange resins, ۸۳.۸۴ %, ۸۶.۷۰ %, ۷۱.۵۹% for Ambersep ion exchange resins and ۶۹.۸۳, ۶۹.۴۱, ۶۹.۳۲ for Amberlite ion exchange resins, respectively. Finally, Purolite C-۱۰۰ Na+ resin has the highest removal percentage in reducing the total hardness and decreasing calcium and magnesium ions.

Keywords:

Water softening , Ion exchange resins , Water corrosion , Water scaling , Hardness