Radiochemical study of Co2+ sorption on chlorite and kaolinite
Author
Shahwan, T.
Erten, H. N.
Date
1999Source Title
Journal of Radioanalytical and Nuclear Chemistry
Print ISSN
0236-5731
Publisher
Akademiai Kiado Rt.
Volume
241
Issue
1
Pages
151 - 155
Language
English
Type
ArticleItem Usage Stats
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Abstract
In this work, the sorption behavior of Co(II) ions on natural chlorite and kaolinite as a function of time, concentration and temperature was studied. 60Co radiotracer method and the batch technique were used. The kinetic results indicated that about one day of contact time was enough to achieve equilibrium. The sorption process was described by Freundlich type isotherms. Sorption of Co(II) ions on both clays was found to be endothermic with ΔH(o) (kJ/mol) and ΔS(o) (kJ/mol·K) being 33 and 0.14 for kaolinite and 17 and 0.102 for chlorite, respectively. The magnitudes of the corresponding ΔG(o) values suggest that sorption occur mainly via an ion exchange mechanism on both clays.
Keywords
Aluminum silicateCobalt
Sodium chlorite
Ion exchange
Kinetics
Mathematical analysis
Radiochemistry
Temperature
Thermodynamics
Time