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首页> 外文期刊>Separation and Purification Technology >A simple determination of counter-ionic permselectivity in an ion exchange membrane from bi-ionic membrane potential measurements:permselectivity of anionic species in a novel anion exchange membrane
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A simple determination of counter-ionic permselectivity in an ion exchange membrane from bi-ionic membrane potential measurements:permselectivity of anionic species in a novel anion exchange membrane

机译：从双离子膜电势测量简单确定离子交换膜中的反离子渗透选择性：新型阴离子交换膜中阴离子种类的渗透选择性

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A new method is proposed here for determining counter-ions permselectivity through an ion exchange membrane.The theoretical base of the method is Henderson equation.After simplifying at special experimental conditions,a linear relationship between the bi-ionic membrane potential term and concentration ratio,i.e.,[exp(z_AF(-DELTAE_T)/RT)- 1](propor.to)[C_(A,L)/C_(B,L)] can be obtained,from the slope of which,the permselectivity of counter-ions can be achieved.This method is very simple in operation and less time and money consuming.The method is exemplified by common 1-1,2-2 and 2-1 counter-ions pair through a novel and published anion exchange membrane.The accuracy and the validity of the method is tested by three aspects:(1)the experimental [exp(z_AF(-DELTAE_T)/RT)- 1](propor.to)[C_(A,L)/C_(B,L)] curve approaches a straight line(2)the predicted order of counter-ions conforms to the results evaluated in a practical electrodialysis process; and(3)the results calculate from different referenced counter-ions for the same counter-ions pair agree well with each other.? 2004 Elsevier B.V.All rights reserved.
机译：本文提出了一种通过离子交换膜测定抗衡离子选择性的新方法。该方法的理论基础是亨德森方程。在特殊实验条件下简化后，双离子膜电势项与浓度比之间存在线性关系，即，[exp（z_AF（-DELTAE_T）/ RT）-1]（与）[C_（A，L）/ C_（B，L）]成正比，从其斜率可以得到计数器的渗透选择性该方法操作简单，耗时少，费钱少。该方法以通过新型且公开的阴离子交换膜的常见的1-1,2-2和2-1对离子为例。该方法的准确性和有效性从三个方面进行了检验：（1）实验性[exp（z_AF（-DELTAE_T）/ RT）-1]（正比）[C_（A，L）/ C_（B， L）]曲线接近一条直线（2），抗衡离子的预测顺序与实际电渗析过程中评估的结果一致; （3）从相同的抗衡离子对的不同参考抗衡离子得出的结果彼此吻合。 2004 Elsevier B.V.保留所有权利。

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