Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-11-23T05:10:14.687Z Has data issue: false hasContentIssue false
  • English
  • Français

Study of the water-bentonite system by vapour adsorption, immersion calorimetry and X-ray techniques: I. Micropore volumes and internal surface areas, following Dubinin's theory

Published online by Cambridge University Press:  09 July 2018

F. Kraehenbuehl ,
H.F. Stoeckli ,
F. Brunner ,
G. Kahr  and
M. Mueller-Vonmoos
F. Kraehenbuehl
Affiliation:
Chemistry Department, University of Neuchâtel, CH-2000 Neuchâtel
H.F. Stoeckli
Affiliation:
Chemistry Department, University of Neuchâtel, CH-2000 Neuchâtel
F. Brunner
Affiliation:
Chemistry Department, University of Neuchâtel, CH-2000 Neuchâtel
G. Kahr
Affiliation:
Institute of Foundation Engineering and Soil Mechanics, Laboratory for Clay Mineralogy, Federal Institute of Technology, CH-8092 Zürich, Switzerland
M. Mueller-Vonmoos
Affiliation:
Institute of Foundation Engineering and Soil Mechanics, Laboratory for Clay Mineralogy, Federal Institute of Technology, CH-8092 Zürich, Switzerland
Get access Rights & Permissions [Opens in a new window]

Abstract

The adsorption and desorption of water, the layer spacing of the montmorillonite with increasing water content and the heat of immersion with water have been measured for a Na-bentonite and two Ca-bentonites. The bentonite-water system is treated in terms of a micropore-filling process. Uptake of water occurs in discrete stages as the montmorillonite structure expands and the internal surface is calculated from these discrete stages of water adsorption.

Type
Research Article
Information
Clay Minerals , Volume 22 , Issue 1 , March 1987 , pp. 1 - 9
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1987

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

Barrer, R.M. (1978) Zeolites and Clay Minerals as Sorbents and Molecular Sieves. Academic Press, London.Google Scholar
Dubinin, M.M. (1975) Physical adsorption of gases and vapours in micropores. Pp. 1–69 in Progress in Surface and Membrane Science, 9 (Cadenhead, D. A., editor). Academic Press, New York.Google Scholar
Dubinin, M.M. & Stoeckli, H.F. (1980) Homogeneous and heterogeneous micropore structures in carbonaceous adsorbents. J. Coll. Surface Sci. 75, 34–42.Google Scholar
El-Akkad, T.M., Flex, N.S., El-Massry, S.R. & Nashed, S. (1982) Nitrogen and water vapor adsorption on monovalent and divalent montmorillonite derivatives and their heats of immersion in polar liquid. Surf Technol. 17, 69–00.Google Scholar
Glaeser, R., Méring, J. & Wyart, J. (1968) Domaines d'hydration homogène des smectites. C. R. Acad. Sci. Paris 267, 463–466.Google Scholar
Gregg, S.J. & Sing, K.S.W. (1982) Adsorption, Surface Area and Porosity, 2nd ed. Academic Press, London.Google Scholar
Keren, R. & Shainberg, I. (1975) Water vapor isotherms and heat of immersion of Na/Ca-montmorillonite systems-I: Homoionic clay. Clays Clay Miner. 23, 193–200.Google Scholar
Keren, R. & Shainberg, I. (1979) Water vapor isotherms and heat of immersion of Na/Ca-montmorillonite systems-II: Mixed systems. Clays Clay Miner. 27, 145–151.Google Scholar
Keren, R. & Shainberg, I. (1980) Water vapor isotherms and heat of immersion of Na/Ca-montmorillonite systems-III: Thermodynamics. Clays Clay Miner. 28, 204–210.Google Scholar
Müller-Vonmoos, M. & Kahr, G. (1983) Mineralogische Untersuchungen von Wyoming-Bentonit MX-80 und Montigel. NAGRA, Technischer Bericht, 83–12.Google Scholar
Ormerod, E.C. & Newman, A.C.D. (1983) Water sorption on Ca-saturated clays: II. Internal and external surfaces of montmorillonite. Clay Miner. 18, 289–299.Google Scholar
Schön, L.G. (1970) Dielektrische Eigenschaften von isolierten Wassermolekülen und mono- und dimolekularen Wasserschichten in Einkristallen von quellfähigen glimmerartigen Schichtsilikaten. Diss. Universität München, 235 p.Google Scholar
Stoeckli, H.F. & Kraehenbuehl, F. (1981) The enthalpies of immersion of active carbons in relation to the Dubinin theory for the volume filling of micropores. Carbon 19, 353–356.Google Scholar
Stul, M.S. & Van Leemput, L. (1982) The texture of montmorillonites as influenced by the exchangeable inorganic cation and the drying method. I: External surface area related to the stacking units of the aggregates. Surf Technol. 16, 89–100.Google Scholar