001×14.5离子交换树脂对镍(Ⅱ)的吸附  

Adsorption of Ni(Ⅱ) by ion exchange resin(001×14.5)

作　　者：杨金杯[1] 陈玉成[1] 余美琼[1] 邱挺[2] 

机构地区：[1]福建师范大学福清分校,福州350300 [2]福州大学化学化工学院,福州350108

出　　处：《环境工程学报》2013年第8期3019-3024,共6页Chinese Journal of Environmental Engineering

基　　金：福建省教育厅科研资助项目(JA12355;JB10202)

摘　　要：实验采用离子交换树脂法吸附镍(Ⅱ),树脂选型确定了强酸性阳离子交换树脂001×14.5对镍(Ⅱ)吸附容量最大。用所选的001×14.5树脂吸附镍(Ⅱ)的过程,静态吸附实验表明,转速大于100 r/min时,对树脂吸附的影响可忽略,即基本消除外扩散,pH=7.0时吸附最佳,镍(Ⅱ)吸附率随树脂用量的增加而增大;001×14.5树脂吸附镍(Ⅱ)过程符合Langmuir等温吸附方程,且为优惠吸附;吸附过程符合拟二级动力学模型,吸附过程活化能为E=30.9 kJ/mol,由颗粒内扩散控制;用1 mol/L的硫酸对吸附饱和树脂进行脱附再生,脱附率可达98%以上。The adsorption of Ni（Ⅱ） in aqueous solution with ion exchange resins was investigated,and 001×14.5 strong acidic cation ion exchange resin showed the maximum capacity by the resin selection experiment.The adsorption properties of the selected 001×14.5 resin for Ni（Ⅱ） were studied by static experiments.The results indicated that the influence of external diffusion was eliminated when stirring speed was over 100 r/min,and the best pH value was 7,and that the percent removal of Ni（Ⅱ） increased as the consumption of resin.The adsorption behavior of 001×14.5 for Ni（Ⅱ）,which was the favourable adsorption,conformed the Langmuir isotherm equation well.The adsorption process corresponded with pseudo-second-order kinetic model,the activation energy was 30.9 kJ/mol,and the kinetics experiments showed that intrapartical diffusion was the main rate-controlling step.The desorption efficiency of resin to Ni（Ⅱ） could be over 98% with 1 mol/L sulfuric acid to regenerate the saturated resin.

关 键 词：离子交换树脂 镍(Ⅱ) 吸附 热力学 动力学 

分 类 号：TQ028.3[化学工程]