文章基本信息

标题：Effect of Solution pH on the Kinetic Adsorption of Methylene Blue by Sugarcane Bagasse Biochar Under a Magnetic Field
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作者：Xiao Mi ; Yujie Guo ; Chunyu Zhang 等
期刊名称：Nature, Environment and Pollution Technology
印刷版ISSN：0972-6268
出版年度：2016
卷号：15
期号：4
语种：English
出版社：Technoscience Publications
摘要：Sugarcane bagasse, an agricultural waste biomass was used to prepare biochar by pyrolyzing thebiomass under oxygen-limited conditions. The prepared biochar was used for the adsorptive removalof a cationic dye methylene blue (MB) under a magnetic field. It was found that the existence of theexternal magnetic field had significantly enhanced the uptake of MB onto the bagasse biochar. Theincreased biochar dosage actually declined the uptake of MB while the effect of the magnetic fieldwas 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 andElovich kinetic models. The Elovich kinetic model was found to be more suitable to describe theadsorption kinetics. This indicates that the adsorption of MB onto BC400 is a chemisorption process inwhich the rate-determining step is diffusion in nature. The uptake of MB is mainly attributed to the electron-donor-acceptor interaction and electrostatic attraction.