SynopsisThe water and salt transport properties of untreated and heat-treated poly(viny1 alcohol) (PVA) membranes were investigated. Water and salt permeabilities decreased abruptly as a result of heat treatment. The effect of heat treatment on the water and salt transport in PVA is expressed mainly by changes in the activation energies of the corresponding permeability coefficients. Due to the fact that the decrease in the salt permeability with heat treatment was considerably greater than the decrease in the water permeability, a pronounced improvement in the salt rejection of PVA membranes was found as a result of heat treatment.

SynopsisThe water and salt transport properties of ionizing radiation crosslinked poly(vinyl alcohol) (PVA) membranes were investigated.The studied membranes showed high permeabilities and low selectivities for both water and salt. The results were found to be in accord with a modified solution_iiffusion model for transport across the membranes, in which pressure-dependent permeability coefficients are employed.

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