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The effects of time, temperature, and concentration on Sr (super 2+) exchange in clinoptilolite in aqueous solutions

Jennifer L. Palmer and Mickey E. Gunter
The effects of time, temperature, and concentration on Sr (super 2+) exchange in clinoptilolite in aqueous solutions
American Mineralogist (April 2001) 86 (4): 431-437

Abstract

Four grams of a clinoptilolite-rich rock, crushed to -180 mesh, were exchanged in deionized water (DI), and in 0.1, 0.01, and 0.001 M solutions of SrCl (sub 2) .6H (sub 2) O at 5, 21, 50, and 90 degrees C for 0.5, 5, 24, and 240 h yielding 64 sample solutions, which were vacuum-filtered to remove solids. The solutions were analyzed by ICP-AES for the outgoing cations (i.e., Na (super +) , K (super +) , Ca (super 2+) , and Mg (super 2+) ). The higher molarity solutions were expected to contain greater concentrations of the outgoing cations than the DI or lower molarity concentration solutions. This trend was exhibited by the monovalent and divalent cations in samples of all concentrations. Outgoing monovalent cations exchanged to greater extents with increasing time and temperature. Outgoing divalent cations of 0.01 and 0.001 M concentrations exchanged at low temperatures contained greater concentrations of outgoing divalent cations than solutions exchanged at high temperatures. The concentrations of the monovalent cations were slightly greater in the 0.001 M sample than in DI, whereas divalent cations had a similar concentration between the 0.001 M and DI treatments. Overall exchange of cations out of the clinoptilolite was favored at higher temperatures.


ISSN: 0003-004X
EISSN: 1945-3027
Coden: AMMIAY
Serial Title: American Mineralogist
Serial Volume: 86
Serial Issue: 4
Title: The effects of time, temperature, and concentration on Sr (super 2+) exchange in clinoptilolite in aqueous solutions
Affiliation: University of Idaho, Department of Geological Sciencves, Moscow, ID, United States
Pages: 431-437
Published: 200104
Text Language: English
Publisher: Mineralogical Society of America, Washington, DC, United States
References: 31
Accession Number: 2001-049385
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 200115
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