弱碱性环氧阴离子交换树脂去除水中铜的动力学研究  

KINETICS OF ADSORPTION OF COPPER FROM WATER BY WEAK BASE EPOXY ANION-EXCHANGE RESIN

作　　者：马红梅[1] 朱志良[1] 张荣华[1] 林建伟[1] 赵建夫[1] 

机构地区：[1]同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室,上海200092

出　　处：《离子交换与吸附》2006年第6期519-526,共8页Ion Exchange and Adsorption

基　　金：上海市科委基础研究重点课题(05JC14059);科技部小城镇科技发展重大项目(2003BA808A17)

摘　　要：利用701弱碱性环氧阴离子交换树脂对饮用水中痕量Cu2+的去除工艺进行了研究,探讨了影响Cu2+吸附的因素以及该树脂吸附Cu2+的动力学参数。结果表明,701弱碱性环氧阴离子交换树脂对Cu2+的吸附符合Langmuir吸附模型,静态吸附容量为83.33mg/g;并用动边界模型推算出701弱碱性环氧阴离子交换树脂对Cu2+的吸附过程的速度控制步骤为表面络合反应,该过程近似于一级反应。A fundamental investigation on the removal of copper from light-polluted water by 701 weak alkaline epoxy anion resin was conducted in batch conditions, The influence of different experimental parameters and kinetic data was studied. Moving Boundary Model was applied to describe the kinetics of exchange process. The results showed that copper can be perfectly adsorbed by the resin with high selectivity under the experimental conditions. By using of 701 weak alkaline epoxy anion resin, copper ions in water solution was concentrated from large amount of co-existed alkaline metals and alkaline earth metals. The elimination process of copper accorded with Langmuir model. The absorption rate constant K20℃ is 4.73×10^-5, the saturate absorption capacity of copper is 83.33mg/g. The process follows a second-order or pseudo second-order kinetics.

关 键 词：铜 离子交换树脂 动边界模型 吸附 动力学 

分 类 号：O647.3[理学—物理化学]