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Rejection of phenolic derivatives in aqueous solution by an interpolymer anionic composite reverse osmosis membrane
Author(s) -
Koyama Kiyoshi,
Kimura Eiichiro,
Hashida Isao,
Nishimura Masato
Publication year - 1984
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.1984.070290920
Subject(s) - reverse osmosis , membrane , aqueous solution , chemistry , permeation , branching (polymer chemistry) , thin film composite membrane , polymer chemistry , organic chemistry , chemical engineering , chromatography , biochemistry , engineering
Reverse osmosis separation for 23 phenollic derivatives was examined by an anionic charged composite membrane. The solute permeation was carried out in single‐solute aqueous solution (200 mg/L) under applied pressure of 3.92–7.85 MPa at 25°C. The correlation between the solute rejection and polar parameters for phenolic derivatives has been investigated. For p ‐alkylphenols, the solute rejection increased with molecular weight and/or molecular branching. In undissociated state, the rejection of phenolic derivatives was closely related with the Taft's number and the Hammett's number of substituents. Also rejections of phenolic derivatives depended upon the pH value of feed soultion and the polar effect of substituted groups. For example, rejections of aminophenols showed the minimum value at a certain pH value and on either side of the minimum point, the rejection of aminophenol increased. From these facts, the main factors in reverse osmosis serparation by an anionic composite membrane were discussed.