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Semipermeable membranes of cellulose acetate for desalination in the process of reverse osmosis. III. Bound water relationships
Author(s) -
Vincent Arthur L.,
Barsh Max K.,
Kesting Robert E.
Publication year - 1965
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1965.070090704
Subject(s) - membrane , desalination , permeation , reverse osmosis , bound water , chemistry , cellulose acetate , chemical engineering , cellulose , semipermeable membrane , chromatography , molecule , organic chemistry , biochemistry , engineering
The mechanism by which water and dissolved salts permeate selectively through membranes has been investigated. It has been demonstrated that the predominant mechanism of permeation involves the interaction of the various species with specific sites and their associated bound water molecules. The extent of the bound water held by the cellulosic membranes of interest has been determined. Correlation has been found between the permeation characteristics demonstrated by membranes at various steps in their preparation and its bound water content. The mechanism of rejection of salts has been shown to be related to the relative inability of their ions to become solvated by bound water. A model has been hypothesized which correctly describes the behavior of the desalination membrane with reference to water and soluble inorganic salts.