Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-30T19:41:47.437Z Has data issue: false hasContentIssue false
  • English
  • Français

Study of the water-bentonite system by vapour adsorption, immersion calorimetry and X-ray techniques: II. Heats of immersion, swelling pressures and thermodynamic properties

Published online by Cambridge University Press:  09 July 2018

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

Abstract

A number of thermodynamic properties were obtained from the determination of adsorption isotherms and enthalpies of immersion for systems with water and Na- and Ca-bentonites. Entropy differences were calculated by combining the enthalpies of immersion and the changes in free energy derived from the adsorption isotherms. The swelling pressures, also calculated from the water adsorption isotherms, are in satisfactory agreement with the experimental data.

Type
Research Article
Information
Clay Minerals , Volume 25 , Issue 4 , December 1990 , pp. 499 - 506
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1990

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

Bucher, F. & Müller-Vonmoos, M. (1989) Bentonite as a containment barrier for the disposal of highly radioactive wastes. Applied Clay Sci., 4, 157–177.Google Scholar
Bucher, F. & Spiegel, U. (1984) Quelldruck von hochverdichteten Bentoniten. NAGRA Techn. Bericht, 84–18. Google Scholar
Fripiat, J., Cases, J., Francois, M. & Letellier, M. (1982) Thermodynamic and microdynamic behavior of water in clay suspensions and gels. J. Coll. Interf. Sci., 89, 378–400.Google Scholar
Gregg, S J. & Sing, K.S.W. (1982) Adsorption, Surface Area and Porosity., 2nd ed. Academic Press, London.Google Scholar
Kraehenbuehl, F., Stoeckli, H.F., Brunner, F., Kahr, G. & Muller-Vonmoos, M. (1987) Study of the water- bentonite system by vapour adsorption, immersion calorimetry and X-ray techniques: I. Micropore volumes and internal surface area, following Dubinin's theory. Clay Miner., 22, 1–9.CrossRefGoogle Scholar
Kune, J.W. (1969) On the interaction of water molecules and montmorillonite surfaces. Soil Sci. Soc. Am. Proc., 33, 539–543.Google Scholar
Low, P.F. & Anderson, D.M. (1958) Osmotic pressure equation for determining thermodynamic properties of water. Soil Sci., 86, 251.Google Scholar
Mooney, R.W., Keenan, A.G. & Wood, L.A. (1952) Adsorption of water vapor by montmorillonite. J. Am. Chem. Soc., 74, 1367–1374.Google Scholar
Müller-Vonmoos, M. & Kahr, G. (1983) Mineralogische Untersuchungen von Wyoming-Bentonit MX-80 und Montige. NAGRA Techn. Bericht 83-12. Google Scholar
Oliphant, J.L. & Low, P.F. (1982) The relative partial specific enthalpy of water in montmorillonite-water systems and its relation to the swelling of these systems. J. Coll. Interf. Sci., 89, 366–373.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
Sposito, G. (1972) Thermodynamics of swelling clay-water systems. Soil Sci., 114, 243–245.Google Scholar
Sposito, G. & Prost, R. (1982) Structure of water adsorbed on smectites. Chem. Rev., 82, 553–573.Google Scholar