Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/106454
Type: Artigo de periódico
Title: Adsorption And Thermodynamic Studies Of Cu(ii) And Zn(ii) On Organofunctionalized-kaolinite
Author: Guerra D.L.
Airoldi C.
de Sousa K.S.
Abstract: Kaolinite-bearing clay samples from Perus, São Paulo state, Brazil, were used for chemical modification process with dimethyl sulfoxide and organofunctionalized with the silyating agent (RO)3Si(CH2)3NH(CH2)2NH2 in the present study. The resulting material and natural kaolinite were subjected adsorpion process with Cu(II) and Zn(II) from aqueous solution at pH 6.0 and controlated temperature of 298 K. The Langmuir adsorption isotherm model has been applied to fit the experimental data. The results showed that the chemical modification process increases the basal spacing of the natural kaolinite from 0.711 to 0.955 nm. The energetic effects caused by Cu(II) and Zn(II) interactions were determined through calorimetric titration at the solid-liquid interface and gave a net thermal effect that enabled the calculation of the exothermic values and the equilibrium constant. © 2008.
Editor: 
Rights: fechado
Identifier DOI: 10.1016/j.apsusc.2008.02.017
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-43049172150&partnerID=40&md5=f67a5f186ef8a34fecbef60ce21e1fed
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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