Diffusion mechanism and ion exchange equilibria of some heavy metal ions on cerium(IV) antimonate as cation exchanger

Authors
El-Naggar, IM Zakaria, ES Shady, SA Aly, HF
Citation
Im. El-naggar et al., Diffusion mechanism and ion exchange equilibria of some heavy metal ions on cerium(IV) antimonate as cation exchanger, SOL ST ION, 122(1-4), 1999, pp. 65-70
Citations number
23
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE IONICS
ISSN journal
01672738 → ACNP
Volume
122
Issue
1-4
Year of publication
1999
Pages
65 - 70
Database
ISI
SICI code
0167-2738(199907)122:1-4<65:DMAIEE>2.0.ZU;2-2
Abstract
The kinetics and mechanism of diffusion of Zn2+, Sr2+, Co2+ and Eu3+ in the H+-form of cerium(IV) antimonate (CeSb) have been studied as a function of particle sizes, reaction temperatures and solution concentrations of the e xchanging ions. The exchange rate was controlled by particle diffusion mech anism as a limited batch technique. The physical thermodynamic parameters s uch as, activation energies and entropies of activation have been evaluated . The mobility of these ions inside the particles of the exchanger decrease in the order: Zn2+ > Sr2+ > Co2+ > Eu3(C) 1999 Elsevier Science B.V. All rights reserved.