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高等学校化学研究 ›› 2003, Vol. 19 ›› Issue (1): 63-69.

• Articles • 上一篇    下一篇

Partition Equilibrium on the Interface Between a Charged Membrane and a Mixed Electrolyte Aqueous Solution

XU Tong-wen, YANG Wei-hua   

  1. Department of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. China
  • 收稿日期:2002-05-27 出版日期:2003-01-24 发布日期:2011-08-06
  • 基金资助:

    Supported by the National Natural Science Foundation of China(No.20106015 and 29976040), Natural Science Foundation of Anhui Province(No.99045431) and Key Foundation of Educational Committee of Anhui Province(No.2000jl255zd).

Partition Equilibrium on the Interface Between a Charged Membrane and a Mixed Electrolyte Aqueous Solution

XU Tong-wen, YANG Wei-hua   

  1. Department of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. China
  • Received:2002-05-27 Online:2003-01-24 Published:2011-08-06
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.20106015 and 29976040), Natural Science Foundation of Anhui Province(No.99045431) and Key Foundation of Educational Committee of Anhui Province(No.2000jl255zd).

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摘要： Ionic partition equilibrium on a charged membrane immersed in a mixed electrolyte solution was systematically investigated and several models were established for the determination of partition coefficients. On the basis of theoretical models, the effects of the concentration ratio λ of the fixed group(charged density) to reference electrolyte, the concentration ratio η between the two electrolytes existing in the solution and the valence of the electrolyte ions on the partition equilibrium in a positively charged membrane were analyzed and simulated within the chosen parameters in detail. The obtainable results can also be applicable to a sytem of mixed electrolytes contacting with a negatively charged membrane. The theoretical calculations were confirmed with the experimental data of model mixed electrolytes, NaCl+HCl and CaCl2+NaCl partitioned in the system of self-made negatively charged membrane-sulphonated poly(phenylene oxide)(SPPO) with different charge densities.

关键词: Partition coefficient, Donnan equilibrium, Mixed electrolyte, Charged membrane

Abstract: Ionic partition equilibrium on a charged membrane immersed in a mixed electrolyte solution was systematically investigated and several models were established for the determination of partition coefficients. On the basis of theoretical models, the effects of the concentration ratio λ of the fixed group(charged density) to reference electrolyte, the concentration ratio η between the two electrolytes existing in the solution and the valence of the electrolyte ions on the partition equilibrium in a positively charged membrane were analyzed and simulated within the chosen parameters in detail. The obtainable results can also be applicable to a sytem of mixed electrolytes contacting with a negatively charged membrane. The theoretical calculations were confirmed with the experimental data of model mixed electrolytes, NaCl+HCl and CaCl2+NaCl partitioned in the system of self-made negatively charged membrane-sulphonated poly(phenylene oxide)(SPPO) with different charge densities.

Key words: Partition coefficient, Donnan equilibrium, Mixed electrolyte, Charged membrane