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Adsorption of Water by Homoionic Exchange Forms of Wyoming Montmorillonite (SWy-1)

Published online by Cambridge University Press:  02 April 2024

Peter L. Hall  and
Douglas M. Astill
Peter L. Hall
Affiliation:
Schlumberger Cambridge Research, P.O. Box 153, Cambridge CB3 0HG, United Kingdom
Douglas M. Astill*
Affiliation:
Schlumberger Cambridge Research, P.O. Box 153, Cambridge CB3 0HG, United Kingdom
*
1Present address: Astromed Ltd., Cambridge Science Park Milton Rd., Cambridge CB4 4GS, United Kingdom.
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Abstract

Adsorption isotherms for water on homoionic (Ca2+, Li+, Na+, and K+) exchanged forms of Crook County, Wyoming, montmorillonite (CMS Source Clay SWy-1) were measured between 25° and 70°C using a vacuum microbalance having automated control of water vapor pressure. From these adsorption data, integral enthalpies and entropies of adsorption were calculated. Both quantities were negative, but decreased in magnitude with increasing amounts of adsorbed water. For all four cationic forms of the clay, the amount of initial water adsorption at 25°C and at low relative humidities was sensitive to the sample temperature during prior evacuation of water, less water being adsorbed by samples evacuated at 100°C compared with samples evacuated at 25°. For Ca- and Na-montmorillonite, these changes were reversible after several subsequent desorption/adsorption cycles, but recovery was not observed for the Li-SWy-1 clay, probably because of migration of Li+ into the aluminosilicate structure.

Keywords

AdsorptionEnthalpyEntropyMontmorilloniteRelative humidityWater
Type
Research Article
Information
Clays and Clay Minerals , Volume 37 , Issue 4 , August 1989 , pp. 355 - 363
Copyright
Copyright © 1989, The Clay Minerals Society

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References

Astill, D. M., Hall, P. L. and McConnell, J. D. C., 1987 An automated vacuum microbalance for measurement of adsorption isotherms J. Phys. E: Sci. Instrum. 20 19 – 21.CrossRefGoogle Scholar
Barshad, I. and Swineford, A., 1960 Thermodynamics of water adsorption and desorption on montmorillonite Clays and Clay Minerals, Proc. 8th Natl. Conf., Norman, Oklahoma, 1959 New York Pergamon Press 84 – 101.Google Scholar
Bird, P., 1984 Hydration phase diagrams and friction of montmorillonite under laboratory and geologic conditions, with implications for shale compaction, slope stability, and strength of fault gouge Tectonophysics 107 235 – 260.CrossRefGoogle Scholar
Cheatham, J. B., 1984 Wellbore stability J. Petrol Tech. 889 – 896.CrossRefGoogle Scholar
Colten, V. A., 1986 Hydration states of smectites in NaCl brines at elevated pressures and temperatures Clays & Clay Minerals 34 385 – 389.CrossRefGoogle Scholar
Fripiat, J. J., Jelli, A., Poncelet, G. and André, J., 1965 Thermodynamic properties of adsorbed water molecules and electrical conduction in montmorillonite and silicates J. Phys. Chem. 69 2185 – 2197.CrossRefGoogle Scholar
Glaeser, R. and Méring, J., 1954 Hydration isotherms of bi-ionic montmorillonites (Na, Ca) Clay Miner. Bull. 2 188 – 193.CrossRefGoogle Scholar
Glaeser, R. and Méring, J., 1968 Homogeneous hydration domains of the smectites Compt. Rend. Acad. Sci. Paris 267 436 – 466.Google Scholar
Hall, P. L., Astill, D. M. and McConnell, J. D. C., 1986 Thermodynamic and structural aspects of the dehydration of smectites in sedimentary rocks Clay Miner. 21 633 – 648.CrossRefGoogle Scholar
Hill, T. L., 1949 Statistical mechanics of adsorption V. Thermodynamics and heat of adsorption J. Chem. Phys. 17 520 – 535.CrossRefGoogle Scholar
Hill, T. L., 1950 Statistical mechanics of adsorption. IX. Adsorption thermodynamics and solution thermodynamics J. Chem. Phys. 18 246 – 256.CrossRefGoogle Scholar
Hill, T. L., Emmett, P. M. and Joyner, L. E., 1951 Calculations of thermodynamic functions of adsorbed molecules from adsorption isotherm measurements. Nitrogen on graphon J. Amer. Chem. Soc. 73 5102 – 5107.CrossRefGoogle Scholar
Hoffmann, U. and Kiemen, R., 1950 Effect of heating on Li-bentonite Z. Anorg. Chem. 262 95 – 99.Google Scholar
Kaye, G. W. C. and Laby, T. H., 1973 Tables of Physical and Chemical Constants 14th ed. London Longman 173.Google Scholar
Keren, R. and Shainberg, I., 1975 Water vapor isotherms and heat of immersion of Na/Ca-montmorillonite systems—I: Homoionic clay Clays & Clay Minerals 23 193 – 200.CrossRefGoogle Scholar
Keren, R. and Shainberg, I., 1979 Water vapor isotherms and heat of immersion of Na/Ca-montmorillonite systems—II: Mixed systems Clays & Clay Minerals 27 145 – 151.CrossRefGoogle Scholar
Keren, R. and Shainberg, I., 1980 Water vapor isotherms and heat of immersion of Na- and Ca-montmorillonite systems. III. Thermodynamics Clays & Clay Minerals 28 204 – 210.CrossRefGoogle Scholar
Kijne, J., 1969 On the interaction of water molecules and montmorillonite surfaces Soil Sci. Soc. Amer. Proc. 33 539 – 543.CrossRefGoogle Scholar
Koster van Groos, A. F. and Guggenheim, S., 1984 The effect of pressure on the dehydration reaction of interlayer water in Na montmorillonite (SWy-1) Amer. Mineral. 69 872 – 879.Google Scholar
Koster van Groos, A. F. and Guggenheim, S., 1986 Dehydration of K-exchanged montmorillonite at elevated temperatures and pressures Clays & Clay Minerals 34 281 – 286.CrossRefGoogle Scholar
Koster van Groos, A. F. and Guggenheim, S., 1987 Dehydration of a Ca- and a Mg-exchanged montmorillonite (SWy-1 ) at elevated pressures Amer. Mineral. 72 292 – 298.Google Scholar
MacEwan, D. M. C. Wilson, M. J., Brindley, G. W. and Brown, G., 1980 Interlayer and intercalation complexes of clay minerals Crystal Structures of Clay Minerals and their X-ray Identification London Mineralogical Society 197 – 248.CrossRefGoogle Scholar
Méring, J., 1946 On the hydration of montmorillonite Trans. Faraday Soc. 42B 205 – 219.CrossRefGoogle Scholar
Mooney, R. W., Keenan, A. G. and Wood, L. A., 1952 Adsorption of water by montmorillonite. I. Heat of desorption and application of BET theory J. Amer. Chem. Soc. 74 1367 – 1371.CrossRefGoogle Scholar
Mooney, R. W., Keenan, A. G. and Wood, L. A., 1952 Adsorption of water by montmorillonite. II. Effect of exchangeable ions and lattice swelling as measured by X-ray diffraction J. Amer. Chem. Soc. 74 1372 – 1374.CrossRefGoogle Scholar
Moore, W. J., 1972 Physical Chemistry 5th ed. London Longman 212.Google Scholar
Ormerod, E. C. and Newman, A. C. D., 1983 Water sorption on Ca-saturated clays. II. Internal and external surfaces of montmorillonite Clay Miner. 18 289 – 299.CrossRefGoogle Scholar
Powers, M. C., 1967 Fluid release mechanisms in compacting marine mudrocks and their importance in oil exploration Amer. Assoc. Petrol. Geol. Bull. 51 1240 – 1254.Google Scholar
Sposito, G. and Prost, R., 1982 Structure of water adsorbed on smectites Chemical Reviews 82 553 – 573.CrossRefGoogle Scholar
van Olphen, H., 1965 Thermodynamics of interlayer adsorption of water in clays. I. Sodium Vermiculite J. Colloid Sci. 20 822 – 837.CrossRefGoogle Scholar
van Olphen, H. and Heller, L., 1969 Thermodynamics of interlayer adsorption of water in clays. II. Magnesium vermiculite Proc. 3rd Int. Clay Conference, Tokyo, 1969, Vol. I Jerusalem Israel Prog. Sci. Transi. 649 – 657.Google Scholar
van Olphen, H. and Fripiat, J. J., 1979 Data Handbook for Clay Minerals and other Non-metallic Minerals Oxford Pergamon Press.Google Scholar
Zettlemoyer, A. C., Young, E. J. and Chessick, J., 1955 Studies of the surface chemistry of silicate minerals. III. Heat of immersion of bentonite in water J. Phys. Chem. 59 962 – 966.CrossRefGoogle Scholar