磁性离子交换树脂吸附地表源水中有机物机理及应用研究

Absorbing Organism in Raw Water with Magnetic Ion Exchange Resin and its Mechanism

以天津市政地表源水为研究对象,考察了磁性离子交换树脂(MIEX)对市政地表源水中有机物的去除规律.确定了不同季节天津市政源水的MIEX工艺操作条件.实验结果表明:与常规混凝工艺相比MIEX与混凝联用处理不同季节天津市政源水,UV254和CODMn去除率分别提高40%,和19%,以上.同时对MIEX树脂吸附机理进行研究,结果证明MIEX树脂具有良好的脱附再生性能,Freundlich模型和准二级动力学方程能比较好地描述吸附过程,吸附过程放热,低温有利于吸附进行.

In this research, Tianjin＇s municipal raw water was treated with magnetic ion exchange resin （MIEX）. The re- moval rate of organism and optimum technology conditions were examined in different seasons. It showed that the removal rates of UV254 and CODMn were enhanced by 40% and 19% respectively by MIEX resin combined with coagulation. The study of absorption mechanism showed that the MIEX resin had good properties of desorption and regeneration. The Freundlich model and the pseudo-second-order model could express the absorption process. The absorption reaction was exothermic, and low temperature was beneficial to adsorption.