载铁(Fe^(2+))螯合树脂的制备及其去除水中余氯的研究

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

用D401氨基羧酸螯合树脂吸附Fe2+,获得了具有还原性能的载铁改性树脂,利用水中余氯与Fe2+的氧化还原作用,实现了对水中微量余氯的去除。实验结果表明,树脂改性的最佳条件为:Fe2+溶液浓度4 045.44 mg/L,pH在3~5,改性时间2 h。可得到载铁量为39.648 mg/g。当树脂交换铁量达到平衡时,其吸附除氯率可高达98%以上,溶液中余氯残留量低于0.5 mg/L。全过程无其他离子引入水中。获得了一种新的从饮用水中去除有害余氯的方法。

This paper describes the method of D401 cation exchange resin was modified through ion ex- changing in Fe^2＋ soln. According to this modified resin with the property of that the redox of Fe^2＋ and chlorine, and achieving the aim of removing the minim content of residual chlorine from the water. The experiments indicate that when the concentration of Fe^2＋ solution is 4045.44 mg/L,react 2 h and the pH value between 3 and 5. In this way the iron content in the resin is 39.648 mg/g. The efficiency of removing chlorine could reach above 98% and the residual chlorine in the water is below 0.5 mg/L. In addition,this method do not bring other ions into the water. A new remarkable method of remove the nocuous residual chlorine from the drinking water is got.