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Type: Artigo de periódico
Title: The Li+, Na+ And K+ Ion Exchange Reaction Process On The Surface Of Mixed Oxide Sio2/tio2/sb 2o5 Surface Prepared By The Sol-gel Processing Method
Author: Ferreira C.U.
Goncalves J.E.
Kholin Y.V.
Gushikem Y.
Abstract: The porous mixed oxide SiO2/TiO2/Sb2O 5 obtained by the sol-gel processing method presented a good ion exchange property and a high exchange capacity towards the Li+, Na+ and K+ ions. In the H+ M+ ion exchange process, the H+ / Na+ could be described as presenting an ideal character. The ion exchange equilibria of Li+ and K+ were quantitatively described with the help of the model of fixed tetradentate centers. The results of simulation evidence that for the H + / Li+ exchange the usual situation takes place: the affinity of the material to the Li+ ions is decreased with increasing the degree of ion exchange. On the contrary, for K+ the effects of positive cooperativity, that facilitate the H+ / K+ exchange, were revealed.
Rights: aberto
Identifier DOI: 
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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