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The Thermodynamics of Ion Exchange on Clay Minerals. A Preliminary Report on the System Montmorillonite-Cs-Sr

Published online by Cambridge University Press:  01 January 2024

Henry C. Thomas  and
George L. Gaines Jr.
Henry C. Thomas
Affiliation:
Yale University, New Haven, Connecticut, USA
George L. Gaines Jr.
Affiliation:
Yale University, New Haven, Connecticut, USA
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Abstract

A discussion is given of the advantages of the thermodynamic approach in the study of clay-ion-water systems. Generally valid equations for the description of the systems are given, and the relative significance of the osmotic terms is roughly assessed. The principal theoretical and experimental problem is the determination of the initial slopes of the exchange isotherms, and a formal method for handling this difficulty is described. Preliminary results on the system montmorillonite-cesium-strontium are used for illustrative purposes.

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Footnotes

Contribution No. 1195 from the Sterling Chemistry Laboratory of Yale University.

References

Faucher, J. A., Southworth, R. W., and Thomas, H. C. (1952) Adsorption studies on clay minerals. I. Chromatography on clays: Journal of Chemical Physics, v. 20, p. 157–160.CrossRefGoogle Scholar
Gaines, G. L., and Thomas, H. C. (1953) Adsorption studies on clay minerals. II. A formulation of the thermodynamics of exchange adsorption: Journal of Chemical Physics, v. 21, p. 714–718.CrossRefGoogle Scholar
Gelewitz, E. W., and Thomas, H. C. Adsorption studies on clay minerals. III. A torsion pendulum adsorption balance: Review of Scientific Instruments, in press.Google Scholar