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GEOREF RECORD

Interactions of vermiculite and cationic dyes

D. Saehr, R. Le Dred and D. Hoffner
Contribution a l'etude des interactions vermiculite-colorants cationiques
Clay Minerals (December 1978) 13 (4): 411-425

Abstract

Flakes (1-4 mm (super 2) ) of a water swollen vermiculite-M (M = Na,K) adsorb cationic dyes in aqueous solution by ion exchange. The vermiculite-M selectivity for these cations is very small and their content is less than 7% of the C.E.C. Visible absorption spectra of the vermiculite-(M,dye) obtained and dyes in aqueous solution are compared. Concerning methylene blue, Nil blue A and brilliant green cations, a 25 nm shift of one band is registered. This indicates that cationic dye charge is more localized after adsorption, either on central atoms N and S (methylene blue) or on peripheral atoms N (brilliant green). Infrared spectroscopic studies are consistent with these results. Vermiculite-(M,dye) are not coloured pigments and the use of vermiculite as a dye-support is very limited.


ISSN: 0009-8558
Coden: CLMIAF
Serial Title: Clay Minerals
Serial Volume: 13
Serial Issue: 4
Title: Contribution a l'etude des interactions vermiculite-colorants cationiques
Translated Title: Interactions of vermiculite and cationic dyes
Pages: 411-425
Published: 197812
Text Language: French
Summary Language: English
Summary Language: German
Summary Language: Spanish
Publisher: Mineralogical Society, London, United Kingdom
References: 14
Accession Number: 1979-018189
Categories: Mineralogy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. tables
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland
Update Code: 1979
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