Artículos de revistas
Application of succinylated sugarcane bagasse as adsorbent to remove methylene blue and gentian violet from aqueous solutions - Kinetic and equilibrium studies
Fecha
2012Registro en:
DYES AND PIGMENTS, OXFORD, v. 92, n. 3, pp. 967-974, MAR, 2012
0143-7208
10.1016/j.dyepig.2011.09.005
Autor
Guimaraes Gusmao, Karla Aparecida
Gurgel, Leandro Vinícius Alves
Sacramento Melo, Tania Marcia
Gil, Laurent Frederic
Institución
Resumen
In a previous work, succinylated sugarcane bagasse (SCB 2) was prepared from sugarcane bagasse (B) using succinic anhydride as modifying agent. In this work the adsorption of cationic dyes onto SCB 2 from aqueous solutions was investigated. Methylene blue, MB, and gentian violet, GV, were selected as adsorbates. The capacity of SCB 2 to adsorb MB and GV from aqueous single dye solutions was evaluated at different contact times, pH, and initial adsorbent concentration. According to the obtained results, the adsorption processes could be described by the pseudo-second-order kinetic model. Adsorption isotherms were well fitted by Langmuir model. Maximum adsorption capacities for MB and GV onto SCB 2 were found to be 478.5 and 1273.2 mg/g, respectively. (C) 2011 Elsevier Ltd. All rights reserved.