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 wer
Ion-exchange equilibrium of alkali metal/hydrogen ions on amorphous cerium(IV) antimonate
โ Scribed by I.M. El-Naggar; M.E. El-Dessouky; H.F. Aly
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 505 KB
- Volume
- 28
- Category
- Article
- ISSN
- 1381-5148
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โฆ Synopsis
The equilibrium exchange of alkali metal ions (Li+, Na+, Kf and Cs+)/H+ system has been studied in MICI-HCI media at 25, 40 and 60ยฐC. The exchange isotherms have been measured for both forward and reverse reactions, at a solution ionic strength of 0.1, by the batch technique. On the basis of the exchange isotherms, thermodynamic parameters have been calculated and some predictions made for the exchange process taking place in the materials. The selectivity sequence shows that K+ < Na+ < Li' < Csf.
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Ion exchange isotherms at 298 K describing the uni-trivalent exchange of LiY, NaY, KY, RbNaY and CsNaY with Ce 3+ at total normality 0.1 mol equiv. -1 are presented. The out-going cation has a considerable influence on the progress of exchange and the overall preference of the zeolite phase for the
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