AN ANALYSIS OF SOLUTE TRANSPORT ACROSS AROMATIC POLYAMIDE HYDRAZIDE REVERSE-OSMOSIS MEMBRANES

The study of solute transport across freshly synthesised high rejectin g aromatic polyamide hydrazide reverse osmosis (RO) membranes and the predictability of RO separations obtainable from these membranes are r eported. Transport of solute and solvent through RO membranes are anal ysed 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. Experimen tal separation data for various electrolytes in dilute aqueous media a re presented. Reported free energy parameter (-Delta Delta G/RT)(i) fo r specific ions are used to predict the separation behaviour for a few 1 : 1 electrolytes.