Bi-ionic potential studies of parchment supported synthetic membrane

Membrane potentials and bi-ionic potentials (BIP) across parchment supported inorganic precipitate lead tungstate synthetic membrane using various 1:1 electrolytes have been reported. Thermodynamically effective fixed charged density, which is an important parameter governing the membrane phenomena has been evaluated by the theory of Nagasawa and co-workers. The magnitude of the BIP depends upon the concentration and nature of the cations. Theories based on the principles of irreversible thermodynamics as proposed by Toyoshima et al. have been compaired to obtained a relationship which has been used for the evaluation of theoretical values of bi-ionic potentials. The closed agreement between the theoretical and the observed values confirms the applicability of the derived relationship to the membrane-electrolyte system used in these investigations. The membrane is characterized by Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy(FTIR), X-Ray Diffraction (XRD) and Thermogravimetric Analysis (TGA).

Author(s): Mohd Rashid1, Sher Ali1 and M. A. Ansari2

Abstract | PDF

Share This Article