THE EXCHANGE ADSORPTION OF IONS FROM AQUEOUS SOLUTIONS BY ORGANIC ZEOLITES .2.
THE EXCHANGE ADSORPTION OF IONS FROM AQUEOUS SOLUTIONS BY ORGANIC ZEOLITES .2.
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DOI：
10.1021/ja01203a066
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发表时间：
1947-01-01
影响因子：
15
通讯作者：
MYERS, LS
中科院分区：
文献类型：
--
作者：
BOYD, GE;ADAMSON, AW;MYERS, LS
结论1.Dowex50的离子交换平衡和速率与树脂相相当于高电离盐溶液的假设是一致的。2.假定活度系数等于强氯溶液中的活度系数，离子交换平衡数据可用膜扩散的Don-nan概念来解释。3.正如Donnan理论所预测的那样，树脂相中可扩散阴离子的浓度低于溶液相中的浓度，但在稀溶液中没有得到与理论定量一致的结果。在低溶液浓度下，Dowex50的交换速率受粒子表面离子间的质量反应速率控制。驱动力是树脂相中一种离子的活度和溶液相中第二种离子的活度的乘积。速率常数取决于转化率-
Conclusions1. Ion exchange equilibrium and rate for Dowex 50 have been shown to be consistent with the hypothesis that the resin phase is equivalent to a highly ionized salt solution. 2. Assuming activity coefficients equivalent to those in strong chloride solutions, the ion exchange equilibrium data may be interpreted by the Don-nan concept of membrane diffusion. 3. The concentration of diffusible anions in the resin phase is lower than in the solution phase, as anticipated by the Donnan theory, but quanti-tative agreement with the theory is not obtained ni dilute solutions.4. At low solutionconcentrations the exchange rate for Dowex 50 is controlled by the mass ac-tion reaction rate betweenthe ions at the surface of the particle. The driving force is the product of the activity of one ion in the resin phase and the activity of the second ion in the solution phase. The rate constant depends on the tur-