Hostname: page-component-78c5997874-8bhkd Total loading time: 0 Render date: 2024-11-20T01:19:59.621Z Has data issue: false hasContentIssue false
  • English
  • Français

Differential heat of water adsorption for montmorillonite, kaolinite and allophane

Published online by Cambridge University Press:  09 July 2018

S. Iwata ,
F. Izumi  and
A. Tsukamoto
S. Iwata
Affiliation:
Ibaraki University, Inashiki, Tsukuba, Ibaraki 303-03
F. Izumi
Affiliation:
Nat. Inst. Res. Inorga. Mater., Tsukuba Ibaraki 305
A. Tsukamoto
Affiliation:
Kasumigaura School for the Deaf, Ami, Ibaraki 300, Japan
Get access Rights & Permissions [Opens in a new window]

Abstract

Differential heat of water vapour adsorption for Cs+-saturated montmorillonite, kaolinite and allophane was measured over a low relative humidity range from 10−4 to 10−1. Two interactions (clay surface atom-water and counterion-water) are mainly involved in the water vapour adsorption process. To assess the affinity of water to the clay surface, the amounts of adsorbed water and the differential heat due to Cs+ were estimated from equilibrium constants in the gas phase reactions. It is tentatively concluded that (i) a dominant role of water adsorption due to the Cs+-water interaction in the adsorption process is evident only for montmorillonite; (ii) the affinity of water to the clay surface is strongest for allophane and weakest for montmorillonite.

Type
Research Article
Information
Clay Minerals , Volume 24 , Issue 3 , September 1989 , pp. 505 - 512
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1989

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Dzidic, I. & Kebarle, P. (1970) Hydration of the alkali ions in the gas phase. Enthalpies and entropies of reactions M(H2O)n-1+H2O=M(H2O)n J. Phys. Chem., 74, 1466–1474.Google Scholar
Fripiat, J.J., Jelli, A., Poncelet, G. & Andre, J. (1965) Thermodynamic properties of adsorbed water molecules and electrical conduction in montmorillonite and silicas. J. Phys. Chem., 69, 2185–2197.Google Scholar
Fripiat, J. J., Cases, J., Francois, M. & Letellier, M. (1982) Thermodynamic and microdynamic behavior of water in clay suspensions and gels. J. Coll. Inter. Sci., 89, 378–400.Google Scholar
Izumi, F., Hagihara, S. & Takahashi, H. (1982) Application of personal computer to measurement and data treatment of heat of gas adsorption on solid surface. Proc. Nat. Conf. Heat Measurement Soc.,, 21–23 (in Sendai).Google Scholar
Kebarle, P., Searles, SjK., Zolla, A., Scarborough, J. & Arshadi, M. (1967) The solvation of the hydrogen ion by water molecules in the gas phase. Heats and entropies of solvation of individual reactions. J. Am. Chem. Soc., 89, 6393–6399.Google Scholar
Keren, R. & Shainberg, I. (1975) Water vapour isotherms and heat of immersion of Na/Ca-montmorillonite systems—I: Homoionic clay. Clays Clay Miner., 23, 193–200.Google Scholar
Keren, R. & Shainberg, I. (1979) Water vapour isotherms and heat of immersion of Na/Ca-montmorillonite systems—II: Mixed systems. Clays Clay Miner., 27, 145–151.Google Scholar
Kitagawa, Y. (1975) Dehydration, micromorphology and chemical composition of allophane. Bull. Nat. Inst. Agr. Sci. B 26, 95–131.Google Scholar
Kizaki, Y. (1960) The bentonites from Usui District, Gumma Prefecture. Adv. Clay Sci. 2, 146–156.Google Scholar
Masuda, T., Taniguchi, H., Tsutsumi, K. & Takahashi, H. (1978) Heat of adsorption of ammonia on silica- alumina at low surface coverage. Bull. chem. Soc. Japan. 51, 633–634.Google Scholar
Mehra, O.P. & Jackson M .(1959) Iron oxide removal from soils and clays by a dithionite-citrate system with sodium bicarbonate buffer, Clays Clay Miner., 7, 317–327.Google Scholar
Muraoka, M. (1951) Reports on Ibusuki Clay produced from Kagoshima Prefectures. Bull. Geol. Surv. Japan, 2, 74–84.Google Scholar
Schollenberger, C.J. & Simon, R.H. (1945) Determination of exchange capacity and exchangeable bases in soil-ammonium acetate method. Soil Sci., 59, 13–24.CrossRefGoogle Scholar
Sposito, G. & Prost, R. (1982) Structure of water adsorbed on smectites. Chem. Rev., 82, 554–573.Google Scholar
Van Olphen, H. (1969) Thermodynamics of interlayer adsorption of water in clays. Magnesium vermiculite. Proc. Irtt. Clay Conf. Tokyo, 1, 649–657.Google Scholar