Sorption studies of Cs+, Ba2+, and Co2+ ions on bentonite using radiotracer, ToF-SIMS, and XRD techniques
Date
2001
Authors
Shahwan, T.
Erten H. N.
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Supervisor
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Instructor
Source Title
Radiochimica Acta
Print ISSN
0033-8230
Electronic ISSN
Publisher
De Gruyter Oldenbourg
Volume
89
Issue
11-12
Pages
799 - 804
Language
English
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Journal Title
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Abstract
The sorption behaviour of Cs+, Ba2+, and Co2+ ions on bentonite were investigated using the radiotracer method, Time of Flight-Secondary Ion Mass Spectroscopy (ToF-SIMS), and X-Ray Diffraction (XRD). The sorption of Cs+ and Ba2+ were exothermic while sorption of Co2+ was endothermic. The sorption data were well described by Freundlich and Dubinin-Radushkevich isotherms. According to ToF-SIMS results Na+ and Mg2+ were the primary exchanging ions in bentonite. The XRD spectra showed that no structural changes were associated with the sorption of Cs+ and Co2+, and BaCO3 precipitate was formed upon the sorption of Ba2+ on bentonite.
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Keywords
Ba , Bentonite , Co , Cs , Sorption , ToF - SIMS , Barium , Cesium , Cobalt , Magnesium , Sodium , Tracer , Ion exchange , Isotherm , Mass spectrometry , Precipitation , X ray diffraction