Waste bamboo‐derived biochar and multiporous carbon as adsorbents for methyl orange removal

Materials Multiporous carbon (MPC) with a high specific surface area (1121 m2g−1) and mesoporous and microporous structures was prepared by using bamboo biochar (308 m2g−1) as raw material. Methods The preparation involved a CaCO3 activation process, where CaCO3 served as both the template for mesop...

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Bibliographic Details
Published in:Journal of the Chinese Chemical Society (Taipei) 2023-08, Vol.70 (8), p.1628-1635
Main Authors: Wang, Shu‐Sian, Yan, Yu‐Ming, Hsu, Chun‐Han, Lin, Hong‐Ping
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Aqueous solutions
Bamboo
biochar
Calcium carbonate
Carbon
Dyes
methyl orange
porous materials
Raw materials
Silicon dioxide
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Summary:Materials Multiporous carbon (MPC) with a high specific surface area (1121 m2g−1) and mesoporous and microporous structures was prepared by using bamboo biochar (308 m2g−1) as raw material. Methods The preparation involved a CaCO3 activation process, where CaCO3 served as both the template for mesopores and the activating agent for micropores. The template could be easily removed by dilute HCl(aq) solution, making the preparation process simpler and more environmentally friendly compared to using mesoporous SiO2 as a hard template. Results The performance of the MPC and biochar as adsorbents for methyl orange (MO) dye was investigated by means of thermal dynamic isotherms and kinetic models tests. The Langmuir isothermal analysis results revealed that the MPC exhibited a significantly higher MO adsorption capacity (344.8 mg g−1) compared to the bamboo biochar (12.4 mg g−1). The adsorption kinetics of the MPC followed a pseudo‐second‐order model. Conclusion Overall, the obtained MPC material offers a cost‐effective, environmentally friendly, and efficient solution for removing dyes from aqueous solutions. Multiporous carbon with a high specific surface area (1121 m2g−1) and mixed mesopore and micropore structure were prepared from bamboo biochar with a specific surface area of 308 m2g−1 via CaCO3 activation.
ISSN:0009-4536
2192-6549
DOI:10.1002/jccs.202300198