高等学校化学学报

高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (2): 235.

• 论文 • 上一篇    下一篇

过渡金属离子在焦磷锑酸锡上的离子交换反应动力学研究

郭鹏, 刘锦春, 刘良斌, 程介克   

  1. 武汉大学化学系, 430072
  • 收稿日期:1989-06-19 出版日期:1991-02-24 发布日期:1991-02-24
  • 通讯作者: 刘锦春

Kinetics of Ion Exchange Reaction of Transition Metals on Stannic Antimonylpyrophosphate Cation Exchanger

Guo Peng, Liu Jin-chun, Liu Liang-bin, Cheng Jie-ke   

  1. Department of Chemistry, Wuhan University, Wuhan, 430072
  • Received:1989-06-19 Online:1991-02-24 Published:1991-02-24

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被引次数

2

摘要： 应用Nernst-Planck方程研究了过渡金属离子CO2+、Cu2+、Zn2+和Cd2+在焦磷锑酸锡上的离子交换反应动力学.当金属离子浓度大于或等于0.050mol/L时.其交换反应速率基本上不受金属离子浓度的影响,离子交换受粒间扩散过程控制.通过求解Nernst-Planck方程得出了自扩散系数、活化能和活化熵,这些动力学参数的获得有助于揭示其离子交换机理。

关键词: 无机离子交换剂, 焦磷锑酸锡, 过渡金属离子, 离子交换反应动力学

Abstract: The Nernst-Planck equations were applied to the study of the ion exchange reaction kinetics for the transition metal ions(Co2+, Cu2+, Zn2+and Cd2+) with H+-ions on stannic antimonylpy-rophosphate(SSbPP). Under the control of particle diffusion, the rate of exchange has been found to be independent of the metal ion concentration at and above 0. 050 mol/L. The self-diffusion coefficients (D0), the activation energies(Ea) and the entropies of activation (△S*) of transition metal ions have also been calculated by solving Nernst-Planck equations with Apple-II computer. These parameters are useful for predicting the ion exchange mechanism taking place on SSbPP.

Key words: Inorganic ion exchanger, Stannic Antimonylpyrophosphate, Transition metal ions, Kinetics of ion exchange reaction

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