载铁(Fe~(2+))螯合树脂去除饮用水中余氯的性能研究

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,余氯去除的最佳条件为:载铁量为39.648 mg/g的改性树脂平衡振荡3 h,pH控制在5~8,此时除氯率为98.56%。水中常见共存离子不影响氯的去除效果。用0.5%的VC溶液可将树脂还原再生,再生后的树脂可循环使用且除氯效果稳定,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方法。

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

The method of D401 cation exchange resin modified through ion exchanging in Fe2+ soln was described.According to this modified resin with the property of that the redox of Fe2+ and chlorine,the aim of removing the mini content of residual chlorine from the water was achieved.The experiments indicate that when the iron content in the resin is 39.648 mg/g,reaction time is 3 h and the pH value is between 5 and 8,the removal rate of residual chlorine in the water is 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 use 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 removing the nocuous residual chlorine from the drinking water was obtained.