Hostname: page-component-78c5997874-m6dg7 Total loading time: 0 Render date: 2024-11-19T01:57:02.119Z Has data issue: false hasContentIssue false
  • English
  • Français

Clay adsorbed dyes: methylene blue on Laponite

Published online by Cambridge University Press:  09 July 2018

R. A. Schoonheydt  and
L. Heughebaert
R. A. Schoonheydt
Affiliation:
Centrum voor Oppervlaktechemie en Katalyse, Materials Research Centre, K.U. Heverlee, K. Mercierlaan, 92, 3001 Heverlee, Belgium
L. Heughebaert
Affiliation:
Centrum voor Oppervlaktechemie en Katalyse, Materials Research Centre, K.U. Heverlee, K. Mercierlaan, 92, 3001 Heverlee, Belgium
Get access Rights & Permissions [Opens in a new window]

Abstract

The adsorption of methylene blue (MB) from aqueous solution on Laponite (a synthetic 2:1 layer-silicate) exchanged with Na+, Cs+ and tetraethylammonium ions has been studied. At low loadings the monomer form predominates, but as the loading increases dimers and trimers (or higher aggregates) are formed, the latter being the most important species when the loading is equal to, or larger than, the Na+-CEC. The distribution of the molecules over the surface is time-dependent due to changes in the aggregation of the clay particles. On Cs+-Laponite, and to a lesser extent on Na+-Laponite, a small amount of MB is protonated by cation-coordinated water molecules. In similar work where adsorption was from ethanolic solution, MB is adsorbed as monomers and dimers only at small loadings and precipitates on the surface of the clay aggregates at high loadings. These precipitates can be broken up by sonication.

Type
Research Article
Information
Clay Minerals , Volume 27 , Issue 1 , March 1992 , pp. 91 - 100
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1992

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bergmann, K. & O'Konski, C.T. (1963) A spectroscopic study of methylene blue monomer, dimer and complexes with montmorillonite. J. Phys. Chem., 67, 2169–2177.Google Scholar
Berkheiser, V.E. & Mortland, M.M. (1977) Hectorite complexes with Cu(II)- and Fe(II)- 1,10-phenanthroline chelates. Clays Clay Miner., 25, 105–112.CrossRefGoogle Scholar
Cenens, J. & Schoonheydt, R.A. (1988) Visible spectroscopy of methylene blue on hectorite, laponite B and barasym in aqueous suspension. Clays Clay Miner., 36, 214–224.CrossRefGoogle Scholar
Cenens, J. & Schoonheydt, R.A. (1990) Quantitative absorption spectroscopy of cationic dyes on clays. Proc. 9th Int. Clay Conf. Strasbourg, 15–23.Google Scholar
Mortland, M.M. & Raman, K.V. (1968) Surface acidity of smectites in relation to hydration, exchangeable cation and structure. Clays Clay Miner., 16, 393–398.CrossRefGoogle Scholar
Peigneur, P., Maes, A. & Cremers, A. (1975) Heterogeneity of charge density in montmorillonite as inferred from cobalt adsorption. Clays Clay Miner., 23, 71–75.CrossRefGoogle Scholar
Schoonheydt, R.A., Pelgrims, J., Heroes, Y. & Uytterhoeven, J.B. (1977) Characterization of tris(2,2,-bipyridyl)ruthenium(II) on hectorite. Clay Miner., 13, 435–438.Google Scholar
Spencer, W. & Sutta, J.R. (1979) Kinetic study of the monomer-dimer equilibrium of methylene blue in aqueous solution. J, Phys. Chem., 83, 1573–1576.Google Scholar
Theng, B.K.G. (1974) The Chemistry of Clay-Organic Reactions, pp. 211–219. A. Hilger, London.Google Scholar
Touillaux, R., Salvador, P., Vandermeersche, C. & Fripiat, JJ. (1968) Study of water layers adsorbed on Na- and Ca-montmorillonite by the pulsed nuclear magnetic resonance technique. Israel J. Chem., 6, 337–348.Google Scholar
Traynor, M.F., Mortland, M.M. & Pinnavaia, T.J. (1978) Ion exchange and intercalation reactions of hectorite with tris-bipyridyl metal complexes. Clays Clay Miner., 26, 318–326.CrossRefGoogle Scholar
Viaene, K., Caigui, J., Schoonheydt, R.A. & De Schryver, F.C. (1987) Study of the adsorption on clay particles by means of a fluorescent probe. Langmuir, 3, 107–111.CrossRefGoogle Scholar
Viaene, K., Crutzen, M., Kuniyma, B., Schoonheydt, R.A. & De Schryver, F.C. (1988) Study of the adsorption of organic molecules on clay colloids by means of a fluorescent probe. Prog. Colloid Polymer Sci., 266, 242–246.CrossRefGoogle Scholar
Yariv, S. Nasser, A. & Bar-On, P. (1990) Metachromasy in day minerals. J. Chem. Soc. Faraday Trans., 86, 1593–1598.CrossRefGoogle Scholar