An analysis of solute transport across aromatic polyamide hydrazide reverse osmosis membranes

The study of solute transport across freshly synthesised high rejecting aromatic polyamide hydrazide reverse osmosis (RO) membranes and the predictability of RO separations obtainable from these membranes are reported. Transport of solute and solvent through RO membranes are analysed as a Function of Feed molarity, pressure and temperature in terms of pure water permeation constant (A), solute transport parameter (D-AM/K delta) and mass transfer coefficient on the high pressure side of the membranes using Kimura-Sourirajan's transport analysis. Experimental separation data for various electrolytes in dilute aqueous media are presented. Reported free energy parameter (-Delta Delta G/RT)(i) for specific ions are used to predict the separation behaviour for a few 1 : 1 electrolytes.