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Adsorption of xenon and krypton on shalesA method that uses a mass spectrometer as a manometer is employed in the measurement of Xe and Kr adsorption parameters on shales and related samples, where gas partial pressures were lower than 10 to the -11th atm, corresponding adsorption coverages are only small fractions of a monolayer, and Henry's Law behavior is expected and observed. Results show heats of adsorption in the 2-7 kcal/mol range, and Henry constants at 0-25 C of 1 cu cm STP/g per atmosphere are extrapolated. Although the adsorption properties obtained are variable by sample, the range obtained suggests that shales may be capable of an equilibrium adsorption with modern air high enough to account for a significant fraction of the atmospheric inventory of Xe, and perhaps even of Kr. This effect will nevertheless not account for the factor-of-25 defficiency of atmospheric Xe, in comparison with the planetary gas patterns observed in meteorites.
Document ID
19820036625
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Podosek, F. A.
(Washington Univ. Saint Louis, MO, United States)
Bernatowicz, T. J.
(Washington Univ. Saint Louis, MO, United States)
Kramer, F. E.
(Washington University St. Louis, MO, United States)
Date Acquired
August 10, 2013
Publication Date
December 1, 1981
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 45
Subject Category
Earth Resources And Remote Sensing
Accession Number
82A20160
Funding Number(s)
CONTRACT_GRANT: NAGW-122
CONTRACT_GRANT: NAS9-7
Distribution Limits
Public
Copyright
Other

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