期刊
DYES AND PIGMENTS
卷 92, 期 3, 页码 967-974出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2011.09.005
关键词
Adsorption; Adsorption kinetics; Cationic dye; Methylene blue; Gentian violet; Succinylated sugarcane bagasse
资金
- Universidade Federal de Ouro Preto
- FAPEMIG
- CNPq
- CAPES
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.
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