Temperature effects in barium sorption on natural kaolinite and chlorite-illite clays
Author
Shahwan, T.
Erten, H. N.
Date
2004Source Title
Journal of Radioanalytical and Nuclear Chemistry
Print ISSN
0236-5731
Publisher
Akademiai Kiado Rt.
Volume
260
Issue
1
Pages
43 - 48
Language
English
Type
ArticleItem Usage Stats
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Abstract
The sorption of Ba2+ ion on natural kaolinite and chlorite-illite clays was investigated at different initial concentrations and temperatures using the radiotracer method. The sorption data were well described by Freundlich and Dubinin-Radushkevich isotherms. Ba2+ sorption on both clays showed an exothermic behavior with ΔH° (kJ/mol) values being -7 and -5 for sorption on kaolinite and chlorite illite mixed clay, respectively. The ΔG° values indicate that the sorption was spontaneous with sorption energies corresponding to ion-exchange type sorption. X-ray diffraction studies showed that no significant change in the matrix of the clays occurred upon Ba2+ sorption.
Keywords
Aluminum silicateBarium ion
Chlorine derivative
Tracer
Concentration (parameters)
Ion exchange
Isotherm
Temperature sensitivity
X ray diffraction