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Comparative isosteric ion adsorption for mineralsA comparative isosteric ion adsorption study for minerals (kaolinite, rutile, and quartz) was performed in aqueous solutions of CaCl2, LaCl3, and Th(NO3)4 in the presence of the neutral salt NaCl. It was observed that the concentration of Ca(2+) ions required to produce a standard reduction in the electrophoretic mobility of mineral particles was always appreciably greater than the concentration required for the Th(4+) ions. The effectiveness of adsorption of the cations differed from particle to particle and showed that ion adsorption on a mineral surface depends, among other things, on the nature of the mineral surface and on the particular adsorbed cation. The number of cation binding sites on mineral surfaces and the electrochemical free energies of cation adsorption were calculated. It was found that the adsorption energy of La(3+) and Th(4+) ions on rutile, kaolinite, and quartz was greater than that of Ca(2+) on these minerals.
Document ID
19920055483
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Omenyi, Samuel N.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Herren, Blair J.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Snyder, Robert S.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Seaman, Geoffrey V. F.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 15, 2013
Publication Date
March 1, 1986
Publication Information
Publication: Journal of Colloid and Interface Science
Volume: 110
Issue: 1, Ma
ISSN: 0021-9797
Subject Category
Inorganic And Physical Chemistry
Accession Number
92A38107
Distribution Limits
Public
Copyright
Other

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