Study on properties of removing residual chlorine from drinking water using cation exchange resin of carrying ferrum

This paper describes the method of D40l cation exchange resin was modified through ion exchanging in Fe²⁺ soln. According to this modified resin with the property of that the redox of Fe²⁺ and chlorine, and achieving the aim of removing the minim content of residual chlorine from the water. The experiments indicate that when the iron content in the resin was 39.648 mg/g, reaction 3 h and the pH value between 5 and 8. In this way the removal rate of residual chlorine in the water was 98.56%. The ordinary coexisting ions in water do not affect the capability of the resin. The 0.5% VC solution is able to recreate the resin and the circulation using of resin do not reduce the efficiency of removing chlorine. In addition, this method does not bring other ions into the water. A new remarkable method of remove the nocuous residual chlorine from the drinking water was got.