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The Effect of Heat Treatments on the Total Charge and Exchangeable Cations of Ca-, Na-, and Li-Saturated Kaolinite

Published online by Cambridge University Press:  02 April 2024

Kurt D. Pennell ,
R. Dean Rhue  and
Willie G. Harris
Kurt D. Pennell
Affiliation:
Department of Civil Engineering, The University of Michigan, Ann Arbor, Michigan 48109
R. Dean Rhue
Affiliation:
Soil Science Department, University of Florida, Gainesville, Florida 32611
Willie G. Harris
Affiliation:
Soil Science Department, University of Florida, Gainesville, Florida 32611
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Abstract

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The effect of heat treatments on the total charge and water adsorption by Ca-, Na- and Li-saturated kaolinite was studied using extraction techniques and thermal gravimetric analysis, respectively. Measurements of cation exchange capacity indicated that the total charge of Li-kaolinite was reduced by approximately 50% after heating to 110 or 130°C. In contrast, the total charge of Ca-kaolinite remained essentially constant while that of Na-kaolinite decreased slightly. Water adsorption and desorption on Ca- and Li-kaolinite following heat treatments at 150°C were consistent with the total charge of the respective kaolinites. Ion extraction of Li-kaolinite using NH4C1 revealed that only 6% of the Li remained exchangeable after heating, while Al and H were released. Thus, non-exchangeable Li ions not only reduced the total charge of the kaolinite but also displaced Al and H from the kaolinite structure. Infrared spectroscopy also indicated that Li migrated into the kaolinite structure and replaced a portion of the Al from the octahedral sheet. The results presented here indicate that Li-kaolinite represents a surface of reduced charge rather than a surface free of cation-hydration effects. Therefore, Li-kaolinite is not recommended as a reference for the study of vapor-phase adsorption, and conclusions based on such a reference material should be reevaluated.

Keywords

KaoliniteCation exchange capacityWater adsorptionLithium retention
Type
Research Article
Information
Clays and Clay Minerals , Volume 39 , Issue 3 , June 1991 , pp. 306 - 315
Copyright
Copyright © 1991, The Clay Minerals Society

References

Bolland, M. D., Ponser, A. M. and Quirk, J. P., 1976 Surface charge of kaolinites in aqueous suspension Aust. J. Soil Res 14 197 – 216.CrossRefGoogle Scholar
Brindley, G. W. and Ertem, G., 1971 Preparation and solvation properties of some variable charge montmorillon-ites Clays & Clay Minerals 19 399 – 404.CrossRefGoogle Scholar
Calvet, R. and Prost, R., 1971 Cation migration into empty octahedral sites and surface properties of clays Clays & Clay Minerals 19 175 – 186.CrossRefGoogle Scholar
Cashen, G. H., 1959 Electric charges of kaolin Faraday Soc. Trans 55 477 – 486.CrossRefGoogle Scholar
Farmer, V. C. and Russell, J. D., 1967 Infrared absorption spectroscopy in clay studies Clays & Clay Minerals 15 121 – 142.CrossRefGoogle Scholar
Follet, E. A. C., 1965 The retention of amorphous colloidal “ferric hydroxide” by kaolinites J. Soil Sci 16 334 – 341.CrossRefGoogle Scholar
Glaeser, R. and Mering, J., 1971 Migration des cations Li dans les smectites di-octahedriques (effect Hofmann-Klemen) CR. Acad. Sci., Ser. D 273 2399 – 2402.Google Scholar
Greene-Kelly, R., 1953 Irreversible dehydration in mont-morillonite. Part II. Clay Min. Bull 2 52 – 56.CrossRefGoogle Scholar
Greene-Kelly, R., 1955 Lithium absorption by kaolin minerals J. Phys. Chem 59 1151 – 1152.CrossRefGoogle Scholar
Hofmann, V. U. and Kiemen, R., 1950 Verlust der Austauschfähigkeit von Lithiumionen an Bentonit durch Erhitzung Z. Anorg. Allg. Chem 262 95 – 99.CrossRefGoogle Scholar
Jaynes, W. F. and Bigham, J. M., 1987 Charge reduction, octahedral charge, and lithium retention in heated, Li-saturated smectites Clays & Clay Minerals 35 440 – 448.CrossRefGoogle Scholar
Jurinak, J. J., 1961 The effect of pretreatment on the adsorption and desorption of water vapor by lithium and calcium kaolinite J. Phys. Chem 65 62 – 64.CrossRefGoogle Scholar
Jurinak, J. J., 1963 Multilayer adsorption of water by kaolinite Soil Sci. Soc. Am. Proc 27 269 – 272.CrossRefGoogle Scholar
Jurinak, J. J. and Volman, D. H., 1961 Thermodynamics of water and n-butane adsorption by Li-kaolinite at low coverages J. Phys. Chem 65 150 – 152.CrossRefGoogle Scholar
Jurinak, J. J. and Volman, D. H., 1961 Cation hydration effects on the thermodynamics of water adsorption by kaolinite J. Phys. Chem 65 1853 – 1856.CrossRefGoogle Scholar
Keenan, A. G., Mooney, R. W. and Wood, L. A., 1951 The relation between exchangeable ions and water adsorption by kaolinite J. Phys. Chem 55 1462 – 1474.CrossRefGoogle Scholar
Lim, C. H. and Jackson, M. L., 1986 Expandable phyllo-silicate reactions with lithium on heating Clays & Clay Minerals 34 346 – 352.CrossRefGoogle Scholar
Luca, V. and Cardile, C. M., 1989 Cation migration in smectite minerals: Electron spin resonance of exchanged Fe3+ probes Clays & Clay Minerals 37 325 – 332.CrossRefGoogle Scholar
Luca, V., Cardile, C. M. and Meinhold, R. H., 1989 High-resolution multinuclear NMR study of cation migration in montmorillonite Clay Miner 24 115 – 119.CrossRefGoogle Scholar
Martin, R. T. and Swineford, A., 1959 Water-vapor sorption on kaolinite: Hysteresis Clays and Clay Minerals, Proc. 6th Natl. Conf., Berkeley, California, 1958 New York Pergamon Press 259 – 278.Google Scholar
Rhue, R. D., Pennell, K. D., Rao, P. S. C. and Reve, W. H., 1989 Competitive adsorption of alkylbenzene and water vapors on predominantly mineral surfaces Chemosphere 18 1971 – 1986.CrossRefGoogle Scholar
Sposito, G., Prost, R. and Gaultier, J.-P., 1983 Infrared spectroscopic study of adsorbed water on reduced-charge Na/Li-montmorillonites Clays & Clay Minerals 31 9 – 16.CrossRefGoogle Scholar
van Olphen, H. and Fripiat, J. J., 1979 Data Handbook for Clay Materials and Other Non-Metallic Minerals New York Pergamon Press.Google Scholar
Weiss, A. and Russow, J., 1963 The location of exchangeable cations on kaolinites Proc. Int. Clay Conf. Stockholm, 1963, Vol. 1 203 – 213.Google Scholar