The diffusion mechanism of alkali metal ions in the particles of cerium(IV) antimonate

The kinetic behaviour of Li +, Na +, K + and Cs + ions exchange on cerium(IV) antimonate were investigated under conditions of particle diffusion and the limited batch technique. Values for the diffusion coefficients, activation energy and entropy of activation were calculated and their significance...

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Published inSolid state ionics Vol. 92; no. 3; pp. 309 - 315
Main Authors El-Naggar, I.M., Zakaria, E.S., El-Wahab, M.A.Abd, Belacy, N., Aly, H.F.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 02.11.1996
Elsevier Science
Subjects
Activation energy
Alkali exchange
Cerium antimonate
Chemistry
Exact sciences and technology
General and physical chemistry
Ion exchange
Other ion exchangers: preparations and properties
Surface physical chemistry
Alkali exchange
Cerium antimonate
Ion exchange
Activation energy
Antimonates
Sodium Ions
Lithium Ions
Cesium Ions
Cerium compound
Kinetics
Experimental study
Potassium Ions
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Summary:The kinetic behaviour of Li +, Na +, K + and Cs + ions exchange on cerium(IV) antimonate were investigated under conditions of particle diffusion and the limited batch technique. Values for the diffusion coefficients, activation energy and entropy of activation were calculated and their significance were discussed. The values of the effective diffusion coefficient increased in the order Cs + > K + > Na + > Li +, which parallels the ionic radii and the ionic mobility. The activation energy ( E a) was found to decrease with decreases in the entropy change of the system. The data obtained for this exchanger were compared with those for organic resins and other inorganic ion exchangers.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0167-2738
1872-7689
DOI:10.1016/S0167-2738(96)00458-4