SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2025, Vol. 77 ›› Issue (1): 57-65.DOI: 10.1016/j.cjche.2024.10.004

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The Ce-modified biochar for efficient removal of methylene blue dye: Kinetics, isotherms and reusability studies

Shuaishuai Zhang1, Xinan Sun1, Qingwen Luo1, Lin Chi1, Peng Sun1, Lianke Zhang1,2   

  1. 1. School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China;
    2. School of Automation and Electrical Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China
  • 收稿日期:2024-07-16 修回日期:2024-09-21 接受日期:2024-10-08 出版日期:2025-01-28 发布日期:2024-11-08
  • 通讯作者: Shuaishuai Zhang,E-mail:zhangss123@imust.edu.cn;Lianke Zhang,E-mail:nkdlkzhang@163.com
  • 基金资助:
    This work was supported by Basic scientific research business expense project of colleges and universities directly under Inner Mongolia (2024QNJS127 and 2023QNJS131), Science and Technology Plan Program of Inner Mongolia Autonomous Region (2023YFDZ0031), and the Inner Mongolia Natural Science Foundation (2024QN02011).

The Ce-modified biochar for efficient removal of methylene blue dye: Kinetics, isotherms and reusability studies

Shuaishuai Zhang1, Xinan Sun1, Qingwen Luo1, Lin Chi1, Peng Sun1, Lianke Zhang1,2   

  1. 1. School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China;
    2. School of Automation and Electrical Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China
  • Received:2024-07-16 Revised:2024-09-21 Accepted:2024-10-08 Online:2025-01-28 Published:2024-11-08
  • Contact: Shuaishuai Zhang,E-mail:zhangss123@imust.edu.cn;Lianke Zhang,E-mail:nkdlkzhang@163.com
  • Supported by:
    This work was supported by Basic scientific research business expense project of colleges and universities directly under Inner Mongolia (2024QNJS127 and 2023QNJS131), Science and Technology Plan Program of Inner Mongolia Autonomous Region (2023YFDZ0031), and the Inner Mongolia Natural Science Foundation (2024QN02011).

摘要: Exploring modification methods for enhancing the adsorption performance of biochar-based adsorbents for effective removal of methylene blue (MB), biochar-loaded CeO2 nanoparticles (Ce/BC) were synthesized by pomelo peels through co-precipitation combined with the pyrolysis method. Ce/BC showed a higher specific surface area and disorder degree than that of BC. The 0.5Ce/BC (mass ratio of Ce(NO3)3·6H2O/BC = 0.5/1) showed the best performance to adsorption of MB solution at different reaction conditions (MB concentration, Ce/BC composites dosage, and initial pH). Adsorption kinetics and equilibrium isotherms were well-described with a pseudo-first-order equation and Langmuir model, respectively. In addition, the maximum adsorption capacity of 0.5Ce/BC for MB was 105.68 mg·g-1 at 328 K. The strong adsorption was attributed to multi-interactions including pore filling, π-π interactions, electrostatic interaction, and hydrogen bonding between the composites and MB. This work demonstrated that the modified pomelo peels biochar, as a green promising material with cost-effectiveness, exhibited a great potential for broad application prospectively to dyeing-contaminated wastewater treatment.

关键词: CeO2, Biochar, Methylene blue, Adsorption, Stability

Abstract: Exploring modification methods for enhancing the adsorption performance of biochar-based adsorbents for effective removal of methylene blue (MB), biochar-loaded CeO2 nanoparticles (Ce/BC) were synthesized by pomelo peels through co-precipitation combined with the pyrolysis method. Ce/BC showed a higher specific surface area and disorder degree than that of BC. The 0.5Ce/BC (mass ratio of Ce(NO3)3·6H2O/BC = 0.5/1) showed the best performance to adsorption of MB solution at different reaction conditions (MB concentration, Ce/BC composites dosage, and initial pH). Adsorption kinetics and equilibrium isotherms were well-described with a pseudo-first-order equation and Langmuir model, respectively. In addition, the maximum adsorption capacity of 0.5Ce/BC for MB was 105.68 mg·g-1 at 328 K. The strong adsorption was attributed to multi-interactions including pore filling, π-π interactions, electrostatic interaction, and hydrogen bonding between the composites and MB. This work demonstrated that the modified pomelo peels biochar, as a green promising material with cost-effectiveness, exhibited a great potential for broad application prospectively to dyeing-contaminated wastewater treatment.

Key words: CeO2, Biochar, Methylene blue, Adsorption, Stability