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Adsorption of Cationic Dyes by Acrylic Films I—Sorption Isotherms
Author(s) -
Harwood R. J.,
McGregor R.,
Peters R. H.
Publication year - 1972
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1972.tb03083.x
Subject(s) - sorption , adsorption , cationic polymerization , chemistry , ion exchange , ion , polymer , selectivity , inorganic chemistry , polymer chemistry , chemical engineering , organic chemistry , engineering , catalysis
Sorption isotherms have been determined for five basic dyes on films prepared from an acrylic polymer. The results can be explained by an ion‐exchange mechanism over 80% of the concentration range, or by a simple ion‐distribution mechanism over the whole of the range. Addition of sodium ions reduces the dye uptake in accordance with the suggested mechanism. Isotherms of a dye mixture have shown that competition occurs, and the ‘ion selectivity’ constants calculated from these results agree well with those derived using the dyes singly.