Microencapsulação do agente quelante sulfoxina em microesferas de quitosana preparadas por spray drying como novo adsorvente para íons metálicos

Microencapsulação do agente quelante sulfoxina em microesferas de quitosana preparadas por spray drying como novo adsorvente para íons metálicos

Alternative title Microencapsulation of the chelating agent sulfoxine into microspheres of chitosan prepared by spray drying as a new adsorbent for metalic ions
Author Vitali, Luciano Google Scholar
Laranjeira, Mauro Cesar Marghetti Google Scholar
Fávere, Valfredo Tadeu de Google Scholar
Goncalves, Norberto Sanches Autor UNIFESP Google Scholar
Institution Universidade Federal Santa Catarina Departamento de Química
Universidade Federal de São Paulo (UNIFESP)
Abstract In this work, a new adsorbent was prepared by microencapsulation of sulfoxine into chitosan microspheres by the spray drying technique. The new adsorbent was characterized by Raman spectroscopy, scanning electron microscopy and microanalysis of energy dispersive X-rays. The Cu(II) adsorption was studied as a function of pH, time and concentration. The optimum pH was found to be 6.0. The kinetic and equilibrium data showed that the adsorption process followed the pseudo second-order kinetic model and the Langmuir isotherm model over the entire concentration range. An increase of 8.0% in the maximum adsorption capacity of the adsorbent (53.8 mg g-1) was observed as compared to chitosan glutaraldehyde cross-linked microspheres.
Keywords microencapsulation
chitosan
sulfoxine
Language Portuguese
Date 2008-01-01
Published in Química Nova. Sociedade Brasileira de Química, v. 31, n. 6, p. 1400-1404, 2008.
ISSN 0100-4042 (Sherpa/Romeo, impact factor)
Publisher Sociedade Brasileira de Química
Extent 1400-1404
Origin http://dx.doi.org/10.1590/S0100-40422008000600023
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000259796500023
SciELO ID S0100-40422008000600023 (statistics in SciELO)
URI http://repositorio.unifesp.br/handle/11600/4190

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