Donnan Approach to Equilibrium Sorption: Interactions of Cationic Dyes with Acrylic Fibers

The equilibrium sorption of ten cationic dyes by porous and regular acrylic fibers has been investigated. The data have been interpreted by a simple Donnan approach, based on the assumption that there are two different types of acidic groups in these fibers. The ionic distribution coefficients KD fo...

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Bibliographic Details
Published in:Textile research journal 1988-06, Vol.58 (6), p.345-354
Main Authors: Alberghina, Gaetano, Chen, Shui-Lin, Fisichella, Salvatore, Iijima, Toshiro, McGregor, Ralph, Rohner, Rolf M., Zollinger, Heinrich
Format: Article
Language:English
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Summary:The equilibrium sorption of ten cationic dyes by porous and regular acrylic fibers has been investigated. The data have been interpreted by a simple Donnan approach, based on the assumption that there are two different types of acidic groups in these fibers. The ionic distribution coefficients KD for the dyes and the fibers were calculated. These coefficients provide an indirect measure of the “affinity” of the dyes for the fibers. The values of KD have been discussed in relation to the structures of the dyes and fibers, and in relation to the effects of salts, pH, and temperature.
ISSN:0040-5175
1746-7748
DOI:10.1177/004051758805800607