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Selectivity and Adsorptivity of Various Anions in Ion-Exchange Membranes 离子交换膜中各种阴离子的选择性和吸附性
发布日期: 2000-01-01
各种离子的基本输运现象对离子交换膜的应用至关重要。已经进行了几项关于开发预测膜传输的数学模型的研究。利用不可逆热力学原理,导出了描述膜分离孔非稳态扩散的各种输运方程。根据溶质在膜中的选择性/吸附性和传递性,评估了各种阴离子与膜孔/表面之间的相互作用。通过对每个细胞的吸附等温线和相对吸附等温线进行测定。 测定了各种阴离子在膜孔中的透过率,以获得它们的扩散系数和传质系数。根据选择性试验确定的亲和系数和阴离子的传质系数预计可用于膜性能预测。严格研究了阴离子的特性,以将其在膜表面附近的传输现象与其可处理性联系起来。包括3个参考文献、表格和图表。
Basic transport phenomena of various ions are importantfor the application of ion-exchange membranes (IEMs). Several studies on the development of mathematical models for predicting membrane transport have been performed. By using the principles of irreversible thermodynamics, various transport equations have been derived which describe non-stationary diffusion through membrane separating pores. Interactions among various anions and the membrane pore/surface were evaluated in terms of selectivity/adsorptivity andtransmissibility of the solutes in membranes. Relative selectivity of each anion for a membrane was determined by adsorption tests and resulting isotherms, as performed with an adsorption cell. Transmissibility of various anions through membrane pores was determinedto obtain their diffusivities and mass transfer coefficients. Affinity coefficients determined from selectivity tests and mass transfer coefficients of the anions were anticipated to be used for membrane performance prediction. The characteristics of anions were investigated rigorously to relate their transport phenomena near the membrane surface and their treatability. Includes 3 references, tables, figures.
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发布单位或类别: 美国-美国给水工程协会
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