Journal
JOURNAL OF NON-EQUILIBRIUM THERMODYNAMICS
Volume 40, Issue 1, Pages 13-23Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/jnet-2014-0025
Keywords
Non-equilibrium thermodynamics; Nylon-66 membrane; electro-osmotic flux; membrane parameters; zeta potential
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Funding
- University Grant Commission, New Delhi
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Measurements on hydrodynamic and electro-osmotic permeability of water and aqueous solutions of KNO3 and Pb(NO3)(2) in the concentration (C) range of 10(-4) M to 10(-3) M are made across the Nylon-66 membrane. The data obtained are used to ascertain the form of transport equation using the theory of non-equilibrium thermodynamics. Conductance of membrane equilibrated with water and aqueous solutions are measured and the data are used to estimate phenomenological coefficients. These phenomenological coefficients are used to determine the average pore radius, the average number of pores and the membrane constant. Zeta potentials are evaluated using electro-osmotic permeability and membrane-permeant conductance data to understand the electrical nature of the membrane-permeant interface. It is observed that hydrodynamic permeability and electro-osmotic permeability depend linearly on the applied pressure difference and the potential difference, respectively.
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