Abstract
The transport correlations by which one can predict the effect of pressure and solute concentration of the feed solution on membrane performance for the system sodium chloride-water-RO thin film composite membranes have been studied. As the scientific basis for specification and predicting technique the Kimura-Sourirajan analysis, based on a generalised capillary flow model was used. The effect of solute concentration of the feed solution (in the range 0.03–0.16 molality) and operating pressure(in the range of 1000–5000 kPa) on pure water permeability constant (A) and transport parameter (Dam/Kδ) for the thin film composite membranes FT 30 BW, MPD HT and HR-95 were established. The results are compared with the corresponding data obtained for cellulose acetate and aromatic polyamide membranes.
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