Artículos de revistas
Adsorption Of Toluene Into Commercial Organoclay In Liquid Phase: Kinetics, Equilibrium And Thermodynamics
Registro en:
Adsorption Of Toluene Into Commercial Organoclay In Liquid Phase: Kinetics, Equilibrium And Thermodynamics. Wiley-blackwell, v. 93, p. 998-1008 JUN-2015.
0008-4034
WOS:000354542000003
10.1002/cjce.22174
Autor
Stofela
Sara K. F.; de Almeida Neto
Ambrosio F.; Gimenes
Marcelino L.; Vieira
Melissa G. A.
Institución
Resumen
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Organoclays are usually used as sorbents to reduce the spread of organic compounds and to remove them at contaminated sites. This study investigated the liquid-phase adsorption of toluene on organoclay (Spectrogel (R) Type C) of Brazilian company SpectroChem. In spite of not having a large amount of pores, this organoclay is a low-cost, effective adsorbent. Regarding the pH investigations, considerable effects of pH on the adsorption process were not observed. In the kinetics studies, it was observed that the process comes into equilibrium after 1h with rates of about 90% toluene removal. The experimental kinetic data were best fitted by a mass transfer in external film model. For the equilibrium study, the best fit was by the MSAM model at 288.15K, the Dubinin-Radushkevitch model at 298.15K, and the Sips model at 308.15K. Further, the thermodynamic parameters showed that toluene adsorption on organoclay Spectrogel-C is an endothermic process. For tests of regeneration, ethanol was the eluent, which proved more promising. 93 6
998 1008 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) CNPq [Proc. 300986/2013-0]