Effect of Solution pH on the Kinetic Adsorption of Methylene Blue by Sugarcane Bagasse Biochar Under a Magnetic Field

Sugarcane bagasse, an agricultural waste biomass was used to prepare biochar by pyrolyzing the biomass under oxygen-limited conditions. The prepared biochar was used for the adsorptive removal of a cationic dye methylene blue (MB) under a magnetic field. It was found that the existence of the extern...

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Bibliographic Details
Published in:Nature environment and pollution technology 2016-12, Vol.15 (4), p.1297-1297
Main Authors: Mi, Xiao, Guo, Yujie, Zhang, Chunyu, Wang, Li, Zhang, Shen, Zou, Bobo, Wang, Zejie, Li, Guoting
Format: Article
Language:English
Subjects:
Adsorption
Agricultural pollution
Biomass
Carbon
Environmental impact
Kinetics
Magnetic fields
Sugarcane
Temperature
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Summary:Sugarcane bagasse, an agricultural waste biomass was used to prepare biochar by pyrolyzing the biomass under oxygen-limited conditions. The prepared biochar was used for the adsorptive removal of a cationic dye methylene blue (MB) under a magnetic field. It was found that the existence of the external magnetic field had significantly enhanced the uptake of MB onto the bagasse biochar. The increased biochar dosage actually declined the uptake of MB while the effect of the magnetic field was still significant. The adsorption kinetics was investigated under different solution pH conditions. The experimental data were simulated using non-linear pseudo-first-order, pseudo-second-order and Elovich kinetic models. The Elovich kinetic model was found to be more suitable to describe the adsorption kinetics. This indicates that the adsorption of MB onto BC400 is a chemisorption process in which the rate-determining step is diffusion in nature. The uptake of MB is mainly attributed to the π-π electron-donor-acceptor interaction and electrostatic attraction.
ISSN:0972-6268
2395-3454