Please use this identifier to cite or link to this item:
|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|
|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.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.