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Water Vapor Sorption Behavior of Smectite-Kaolinite Mixtures

Published online by Cambridge University Press:  01 January 2024

William J. Likos  and
Ning Lu
William J. Likos*
Affiliation:
University of Missouri-Columbia, Department of Civil and Environmental Engineering, Columbia, MO 65211, USA
Ning Lu
Affiliation:
Colorado School of Mines, Engineering Division, Golden, Colorado 80401, USA
*
*E-mail address of corresponding author: [email protected]
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Abstract

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An experimental program was conducted to investigate the water-vapor sorption characteristics of smectite and kaolinite mixtures. End-member smectite and kaolinite were slurry-mixed together at mass-controlled ratios corresponding to 0%, 20%, 50%, 70%, 80%, 90% and 100% smectite. Vapor desorption isotherms for the mixtures were measured at 24°C for relative humidity (RH) ranging from ∼95% to 0%.

Results show that the amount of water adsorbed by the clay mixtures at a given RH increases systematically with increasing smectite content. Derivative analysis of the sorption isotherms shows evidence of transitions between the two-, one- and zero-layer hydrate-states for the smectite-rich mixtures. The transitions become less apparent as the smectite content decreases. Monolayer coverage, specific surface area, and heat of adsorption were estimated from the isotherms using BET theory. It is shown that monolayer coverage and specific surface for the clay mixtures can be reasonably approximated by weighted averaging of the end-member clay properties. General methodologies are presented for predicting the sorption behavior (i.e. soil-water characteristics) and effective specific surface area from measurements of the end-member sorption isotherms.

Keywords

BET AnalysisClay LinersKaoliniteSmectiteSorption IsothermsSpecific Surface AreaWaste Containment
Type
Research Article
Information
Clays and Clay Minerals , Volume 50 , Issue 5 , October 2002 , pp. 553 - 561
Copyright
Copyright © 2002, The Clay Minerals Society

References

ASTM (2000) Annual Book of ASTM Standards, 4.08, 4.09, D-18 Committee on Soils and Rock, West Conshohocken, PA.Google Scholar
Barshad, I., (1949) The nature of lattice expansion and its relation to hydration in montmorillonite and vermiculite American Mineralogist 34 675 684.Google Scholar
Berend, I. Cases, J. Francois, M. Uriot, J. Michot, L. Maison, A. and Thomas, F., (1995) Mechanism of adsorption and desorption of water vapor by homoionic montmorillonites Clays and Clay Minerals 43 324–336 10.1346/CCMN.1995.0430307.CrossRefGoogle Scholar
Brunauer, S., (1945) The Adsorption of Gases and Vapors: Physical Adsorption New Jersey Princeton University Press 511 pp.Google Scholar
Brunauer, S. Emmett, P.H. and Teller, E., (1938) Adsorption of gases in multimolecular layers Journal of the American Chemical Society 60 309 10.1021/ja01269a023.Google Scholar
Cases, J.M. Berend, I. Besson, G. Francois, M. Uriot, J.P. Thomas, F. and Poirier, J.E., (1992) Mechanism of adsorption and desorption of water vapor by homoionic montmorillonite. I. The sodium exchanged form Langmuir 8 2730–2739 10.1021/la00047a025.Google Scholar
Chipera, S.J. Carey, J.W. and Bish, D.L., (1997) Controlled-humidity XRD analyses: application to the study of smectite expansion/contraction Advances in X-ray Analysis 39 713 721.Google Scholar
Collis-George, N., (1955) The hydration and dehydration of Na-montmorillonite (Belle Fourche) Journal of Soil Science 6 99–110 10.1111/j.1365-2389.1955.tb00834.x.Google Scholar
Del Pennino, U. Mazzega, E. Valeri, S. Alietti, A. Franca-Brigatti, M. and Poppi, L., (1981) Interlayer water and swelling properties of monoionic montmorillonites Journal of Colloid and Interface Science 84 301 10.1016/0021-9797(81)90222-8.Google Scholar
Gillery, F.H., (1959) Adsorption-desorption characteristics of synthetic montmorillonoids in humid atmospheres American Mineralogist 44 806.Google Scholar
Jo, H. Katsumi, T. Benson, C.H. and Edil, T.B., (2001) Hydraulic conductivity and swelling of non-prehydrated GCLs permeated with single-species salt solutions Journal of Geotechnical and Geoenvironmental Engineering 111 557–567 10.1061/(ASCE)1090-0241(2001)127:7(557).Google Scholar
Karaborni, S. Smit, B. Heidug, W. and van Oort, E., (1996) The swelling of clays: molecular simulations of the hydration of montmorillonite Science 111 1102 10.1126/science.271.5252.1102.Google Scholar
Keenan, A.G. Mooney, R.W. and Wood, L.A., (1951) The relation between exchangeable ions and water adsorption on kaolinite Journal of Physics and Colloid Chemistry 55 1462–1474 10.1021/j150492a006.Google Scholar
Keren, R. and Shainberg, I., (1975) Water vapor isotherms and heat of immersion of Na/Ca-montmorillonite systems-I: homoionic clay Clays and Clay Minerals 13 193–200 10.1346/CCMN.1975.0230305.CrossRefGoogle Scholar
Keren, R. and Shainberg, I., (1979) Water vapor isotherms and heat of immersion of Na/Ca-montmorillonite systems-II: Mixed systems Clays and Clay Minerals 27 145–151 10.1346/CCMN.1979.0270212.Google Scholar
Likos, W.J., (2000) Total suction-moisture content characteristics for expansive soils Golden, Colorado Colorado School of Mines 182 pp.Google Scholar
Likos, W.J. and Lu, N., (2001) Automated measurement of total suction characteristics in the high suction range: application to the assessment of swelling potential Journal of the Transportation Research Board 1155 119–128 10.3141/1755-13.Google Scholar
Likos, W.J. and Lu, N. (submitted) An automated humidity system for measuring total suction characteristics of clays. Geotechnical Testing Journal (in press).Google Scholar
Lowell, S., (1979) Introduction to Powder Surface Area New York J. Wiley and Sons 199 pp.Google Scholar
Mesri, G. and Olson, R.E., (1971) Mechanisms controlling the permeability of clays Clays and Clay Minerals 19 151–158 10.1346/CCMN.1971.0190303.Google Scholar
Mitchell, J.K., (1993) Fundamentals of Soil Behavior New York J. Wiley 437 pp.Google Scholar
Mooney, R.W. Keenan, A.G. and Wood, L.A., (1952) Adsorption of water vapor by montmorillonite. II. Effect of exchangeable ions and lattice swelling as measured by X-ray diffraction Journal of the American Chemical Society 14 1371–1374 10.1021/ja01126a002.Google Scholar
Moore, D.M. and Reynolds, R.C. Jr, (1997) X-ray Diffraction and the Identification and Analysis of Clay Minerals New York Oxford University Press 377 pp.Google Scholar
Parker, J.C. and Sparks, D.L., (1986) Hydrostatics of water in porous media Soil Physical Chemistry Boca Raton, Florida CRC Press, Inc. 209 296.Google Scholar
Quirk, J.P., (1955) Significance of surface area calculated from water vapor sorption isotherms by use of the BET equation Soil Science 80 423–430 10.1097/00010694-195512000-00001.Google Scholar
Rumer, R.R. and Mitchell, J.K., (1995) Assessment of Barrier Containment Technologies Baltimore, Maryland International Containment Technology Workshop 437 pp.Google Scholar
Van Olphen, H., (1965) Thermodynamics of interlayer adsorption of water in clays Journal of Colloid Science 10 822–837 10.1016/0095-8522(65)90055-3.Google Scholar
Van Olphen, H., (1991) An Introduction to Clay Colloid Chemistry Germany Krieger 318 pp.Google Scholar
Woods, R.D., (1987) editor () Geotechnical Practice for Waste Disposal. American Society of Civil Engineers, Geotechnical Special Publication 13, 864 pp.Google Scholar