Freundlich Adsorption Isotherm and Electrochemical Characterization of Cellulose acetate-Tween-20 supported liquid membrane

Cellulose acetate (CA) and Tween-20(T-20) are interacted and resulted as a supported liquid membrane system. The membrane potential was measured with uni-uni valent electrolyte, NaCl solutions using saturated calomel electrodes (SCEs).The effective fixed charge density of the membrane was determined by TMS method. Other important electrochemical parameters were calculated. Membrane adsorb-ability showed Freundlich type adsorption. Membrane water uptake with respect to time is observed. Membrane permselectivity (the ability of the membrane to discriminate between the anions (Cl-) and cations (Na+)) is estimated using effective fixed charge density of the membrane. The transport number which quantifies the fraction of the charge carried by certain ion is estimated by membrane potential values. Tween-20 surfactant is most frequently used for membrane surface modification. Electrochemical parameters are estimated under both conditions, i.e. without and with Tween-20 to investigate the effect on the membrane behavior.53% composite membrane of CA/T-20 is obtained as a liquid membrane.