Multi-Ionic Potential and Membrane Permeability Matrix. III. Diffusion and Concentration of Ions within Membrane Phase as a Controlling Factor to Ion Permselectivity
Multi-Ionic Potential and Membrane Permeability Matrix. III. Diffusion and Concentration of Ions within Membrane Phase as a Controlling Factor to Ion Permselectivity
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多离子势和膜渗透性矩阵。
DOI：
10.1246/bcsj.62.2362
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发表时间：
1989
影响因子：
4
通讯作者：
T. Aritomi
中科院分区：
文献类型：
--
作者：
K. Kaibara;H. Inoue;T. Aritomi
在广泛的外电解液条件下，测量了具有高选择性阳离子交换膜的氯化钠-氯化铯和氯化钠-氯化钙体系中的阳离子浓度。阳离子在膜/溶液中的分布和扩散方式作为膜渗透选择性的控制因素，与电化学通量和阳离子通量数据以及估算的膜渗透选择性参数相一致。Na~+/Cs~+浓度比与膜相Na~+/Cs~+浓度比直接关系到膜相的Na~+/Cs~+浓度比。随着外界Na+/Cs+浓度比从1/100增加到100，Na+/Cs+扩散系数比在0.5~3之间变化。而在氯化钠-氯化钙一价二价阳离子体系中，高而恒定的膜钙离子浓度调控着细胞的转运过程。Na~+/Ca~(2+)扩散系数比在0.5~500之间变化.
Membrane concentrations of cations in the NaCl–CsCl and NaCl–CaCl2 systems with a highly selective cation-exchange membrane were measured under the extensive external electrolyte conditions. The modes of membrane/solution distribution and diffusion of cations, as a controlling factor to the membrane permselectivity, were correlated consistently with the electrochemical and cation flux data, as well as with the estimated membrane permselectivity parameters. The NaCl–CsCl uni-uni valent cation system was characterized well by the Na+/Cs+ concentration ratio of external solution, since the Na+/Cs+ concentration ratio in the membrane phase was related directly to the external ratio. Na+/Cs+ diffusion coefficient ratio varied from 0.5 to 3 with increasing external Na+/Cs+ concentration ratio from 1/100 to 100. While in the NaCl–CaCl2 uni-bi valent cation system, the high and constant membrane concentration of Ca2+ regulated the transport process. The Na+/Ca2+ diffusion coefficient ratio ranged from 0.5 to 500 ...