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Spectroscopic study of the adsorption of rhodamine 6G on clay minerals in aqueous suspensions

Published online by Cambridge University Press:  09 July 2018

F. Lopez Arbeloa ,
M. J. Tapia Estevez ,
T. Lopez Arbeloa  and
I. Lopez Arbeloa
F. Lopez Arbeloa
Affiliation:
Departamento de Química Física, Universidad del País Vasco-EHU, Apartado 644, 48080 Bilbao, Spain
M. J. Tapia Estevez
Affiliation:
Departamento de Química Física, Universidad del País Vasco-EHU, Apartado 644, 48080 Bilbao, Spain
T. Lopez Arbeloa
Affiliation:
Departamento de Química Física, Universidad del País Vasco-EHU, Apartado 644, 48080 Bilbao, Spain
I. Lopez Arbeloa
Affiliation:
Departamento de Química Física, Universidad del País Vasco-EHU, Apartado 644, 48080 Bilbao, Spain
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Abstract

Absorption and fluorescence spectroscopies were applied to study the adsorption of rhodamine 6G on several smectite-type clays in aqueous suspension. The dye can be adsorbed as the monomeric and the dimeric forms on both the external and the interlamellar surfaces of the clay. The presence of these species and their evolution with the stirring time of the sample and the relative dye/clay concentration depend on the nature of the smectite, the clay concentration and the particle size, factors that also affect the dispersion degree of the clay particles in water.

Type
Research Article
Information
Clay Minerals , Volume 32 , Issue 1 , March 1997 , pp. 97 - 106
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1997

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