Artigo
Microencapsulação do agente quelante sulfoxina em microesferas de quitosana preparadas por spray drying como novo adsorvente para íons metálicos
Fecha
2008-01-01Registro en:
Química Nova. Sociedade Brasileira de Química, v. 31, n. 6, p. 1400-1404, 2008.
0100-4042
S0100-40422008000600023.pdf
S0100-40422008000600023
10.1590/S0100-40422008000600023
WOS:000259796500023
Autor
Vitali, Luciano
Laranjeira, Mauro Cesar Marghetti
Fávere, Valfredo Tadeu de
Goncalves, Norberto Sanches [UNIFESP]
Institución
Resumen
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.