Studies on the Ion Selective Charged Membranes(I) -Permeability of Alkaline Metal and Tetraalkylammonium Chlorides Through Charged Sulphoethyl Cellulosic Membranes-

Ion선택 투과성 하전막에 관한 연구(I) -하전 Sulphoethyl Cellulose 막의 Alkaline Metal 및 Tetraalkylammonium Chloride 고의 투과성-

The permeation of alkaline metal and tetraalkylmmonium chlorides through charged sulphoethyl cellulosic membranes was investigated at 25$^{\circ}C$. The permeability coefficients were found to increase in a sequence of KCl>(Cch3)4NCl> (C2H5)4NCl>(C4H9)4NCl This sequence was explained by considerng the partition and the hydration of the ions in these hydrophilic membranes. The dependence of the permeability on the salts concentration was interpreted by means of Teorell-Meyer-Sievers theory based on the Nernst-Planck equation. Ionic mobility ratio in these membranes showed the same dependence on the Stokes radius of the cation as that in the bulk aqueous solution. The effectiveness of the fixed charge density was found on the ionic species and was explained by considering the counterion binding by the negatively charged groups in the membrane.