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Kinetics of Reactions in the Conversion of Na- or Ca-Saturated Clay to H-Al Clay

Published online by Cambridge University Press:  01 July 2024

Amos Basin  and
S. Ravikovitch
Amos Basin
Affiliation:
Department of Soil Science, The Hebrew University of Jerusalem, Rehovot, Israel
S. Ravikovitch
Affiliation:
Department of Soil Science, The Hebrew University of Jerusalem, Rehovot, Israel
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Abstract

H-ion was added to Na or Ca bentonite suspensions. The H-ion was added either in solution, as HCl, or adsorbed on a cation exchange resin. The variation with time of the quantities of H and Al in various phases of the system was determined.

In the first stage of the reaction both exchangeable H and exchangeable Al on the clay increased rapidly. Several facts showed that the exchangeable Al was not liberated by crystal structure decomposition. It is postulated that its appearance is the result of a rapid dehydroxylation, of hydroxy Al groups located at plate edges or adsorbed on basal planes, producing water and trivalent Al ions.

During the second stage of the reaction, spontaneous self-decomposition of the clay structure takes place. It was found that when the H-clay in alone in suspension or with low concentration of acid, the decomposition stops after the liberation of a limited quantity of Al. Most of this Al is adsorbed on the clay and it becomes the prevailing exchangeable ion. On the contrary, when the H-clay is aging in the presence of H-resin, a system of consecutive reactions is operating. In this system, Al liberated from the structure is transferred to the adsorbed state in the clay and from there to the resin. As a result the decomposition reaction does not stop as in the absence of the resin, but is carried further.

Type
Research Article
Information
Clays and Clay Minerals , Volume 14 , February 1966 , pp. 193 - 204
Copyright
Copyright © Clay Minerals Society 1966

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References

Aldrich, D. Jr. and Buchanan, J. R. (1968) Anomalies in techniques for preparing H-bentonites: Proc. Soil Sci. Soc. Amer. 22, 281–5.Google Scholar
Banin, A. (1964) The state of ions adsorbed by clay minerals and their behavior in some exchange reactions: Ph.D Thesis. Hebrew University of Jerusalem.Google Scholar
Bolt, G. H. and Frissel, M. J. (1960) The preparation of clay suspensions with specified ionic composition by means of exchange resins: Proc. Soil Sci. Soc. Amer. 24, 172–7.10.2136/sssaj1960.03615995002400030015xCrossRefGoogle Scholar
Coleman, N. T. and Craig, D. (1961) The spontaneous alteration of hydrogen clay: Soil Sci. 91, 14–18.CrossRefGoogle Scholar
Davies, L. E., Turner, R. and Whittig, L. D. (1962) Some studies of the autotransformation of H-bentonite to Al-bentonite: Proc. Soil Sci. Soc. Amer. 26, 441–3.Google Scholar
Eeckman, J. P. and Laudelout, H. (1961) Chemical stability of hydrogen-montmorillonite suspensions: Kolloid Zeit. 178, 99–107.CrossRefGoogle Scholar
Frost, A. A. and Pearson, R. G. (1961) Kinetics and Mechanism: J. Wiley, New York, 405 pp.Google Scholar
Jackson, M. L. (1956) Soil Chemical Analysis—Advanced Course: University of Wisconsin press, Madison, Wisconsin . 991 pp.Google Scholar
Jackson, M. L. (1963) Aluminum bonding in soils: a unifying principle in soil science: Proc. Soil Sci. Soc. Amer. 27, 1–10.CrossRefGoogle Scholar
Laudelout, E. and Eeckman, J. P. (1958) Chemical stability of clay suspensions treated with hydrogen ions: Intern. Soc. Soil Sci. Trans. II and IV Comm. (Hamburg, 1958), 2, 193–9.Google Scholar
Low, P. F. (1955) The role of aluminum in the titration of bentonite: Proc. Soil Sci. Soc. Amer. 19, 135–9.10.2136/sssaj1955.03615995001900020006xCrossRefGoogle Scholar
Nye, P., Craig, D., Coleman, N. T. and Ragland, J. L. (1961) Ion exchange equilibria involving aluminum: Proc. Soil Sci. Soc. Amer. 25, 14–7.CrossRefGoogle Scholar
Raupach, M. (1963) Solubility of simple aluminum compunds expected in soils. II. Hydrolysis and conductance of Al3+, Australian Jour. Soil Res. 1, 36–45.10.1071/SR9630036CrossRefGoogle Scholar
Shen, M. J. and Rich, C. I. (1962) Aluminum fixation in montmorillonite: Proc. Soil Sci. Soc. Amer. 26, 33–6.CrossRefGoogle Scholar
Wilson, A. D. and Sergeant, A. A. (1963) The calorimetric determination of aluminum in minerals by pyrocatechol violet: Analyst 88, 109–12.CrossRefGoogle Scholar