Hydrodynamic and Electro-Osmotic Studies on Transport through Nylon-66 Membrane Using Aqueous Aluminium Nitrate as Permeant

Abstract

The object of this work was to study the transport phenomena across the nylon-66 membrane of aqueous aluminum nitrate as permeants. Hydrodynamic and electro-osmotic permeability measurements of water and aqueous solutions of Al (NO₃)₃.9H₂O in the concentration range of 10^-4 M to 10^-3 M have been made. The data obtained have been used to determine the transport equation using the theory of non-equilibrium thermodynamics. Streaming current generated during the transport of various permeants was also measured and its dependence on pressure investigated. Phenomenological coefficients have been determined using the transport equation and Saxen's relationship verified. Zeta potentials have been evaluated using electro-osmotic permeability and membrane-permeant conductance data. It has been observed that hydrodynamic and electro-osmotic permeabilities depend linearly on applied pressure difference and potential difference respectively.