Study on the permselectivity of ion exchange membrane
来源期刊：Rare Metals2002年第4期
论文作者：MENG Hong, PENG Changsheng, LU Shouci, and WANG Sonfan Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing , China The College of Environmental Science and Engineering, Lanzhou Railway University, Lanzhou , China
文章页码：243 - 249
摘 要：<正>Ion exchange membranes with high permselectivity （the character of separating cations from anions or anionsfrom cations） and high selectivity （the character of separating cations or anions of different valencies） are important forelectrodialysis process. The Donnan equilibrium theory, based on the equilibrium of ions and no electric field, can not ex-actly explain the permselectivity of ion exchange membrane for ED process, since it is impossible to set up a ion exchangeequilibrium between membrane and solution and to neglect the influence of electrical driving force on ions during ED proc-ess. A novel model named "anti-electric potential" is established to interpret the permselectivity of ion exchange membrane,according to the determination of electric potential between membranes and the variation of elements content in solutionsand membranes. The results of experiment prove that the "anti-electric potential" really exists within membranes. As for theselectivity, the results reveal that electric potenti
摘要：<正>Ion exchange membranes with high permselectivity （the character of separating cations from anions or anionsfrom cations） and high selectivity （the character of separating cations or anions of different valencies） are important forelectrodialysis process. The Donnan equilibrium theory, based on the equilibrium of ions and no electric field, can not ex-actly explain the permselectivity of ion exchange membrane for ED process, since it is impossible to set up a ion exchangeequilibrium between membrane and solution and to neglect the influence of electrical driving force on ions during ED proc-ess. A novel model named "anti-electric potential" is established to interpret the permselectivity of ion exchange membrane,according to the determination of electric potential between membranes and the variation of elements content in solutionsand membranes. The results of experiment prove that the "anti-electric potential" really exists within membranes. As for theselectivity, the results reveal that electric potenti
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