Application of succinylated sugarcane bagasse as adsorbent to remove methylene blue and gentian violet from aqueous solutions - Kinetic and equilibrium studies |
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| Authors: | Karla Aparecida Guimarães GusmãoLeandro Vinícius Alves Gurgel Tânia Márcia Sacramento MeloLaurent Frédéric Gil |
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| Affiliation: | a Departamento de Química, ICEB, Campus Morro do Cruzeiro, Universidade Federal de Ouro Preto, 35400-000 Ouro Preto, MG, Brazil
b Grupo de Físico-química orgânica, Departamento de Físico-química, Instituto de Química de São Carlos, Universidade de São Paulo, Av. Trabalhador São Carlense 400, Caixa Postal 780, 13560-970 São Carlos, Brazil |
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| Abstract: | 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. |
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| Keywords: | Adsorption Adsorption kinetics Cationic dye Methylene blue Gentian violet Succinylated sugarcane bagasse |
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