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<p>Garden wastes such as leaves and bark are excellent biomass, which could be a potential source of biochar for purifying air or water. Taking the bark of the plane tree shed in summer as an example, a simple method for producing plane trees’ bark biochar by K<sub>2</sub>CO<sub>3</sub> activation was presented. The method had advantages such as activation and carbonation in one step to prepare biochar. Research results showed that the prepared biochar had a large specific surface area of about 1193.290 m<sup>2</sup>/g. Then, the adsorption kinetics study revealed that the quasi-second-order kinetic model better described the adsorption process. Moreover, the adsorption process was better described by the Freundlich model. The maximum adsorption capacity of 1123&#xa0;mg/g was in the range of 100–250&#xa0;mg/L of MB. The main adsorption mechanism might involve hydrogen bonding, π-π* stacking, electrostatic interaction, and pore filling. This method could be utilized for the preparation of other types of activated carbon to ensure the efficient and comprehensive utilization of biomass.</p>

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Plane trees’ bark–derived porous biochar for efficient methylene blue biosorption

  • 期刊论文

  • 发表日期：

    2025年4月16日

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  • Lihui Zhang,
  • Qiqi Yu,
  • Weili Li,
  • Yanbiao Zhou,
  • Qinlong Peng,
  • Yabo Wang

摘要

Garden wastes such as leaves and bark are excellent biomass, which could be a potential source of biochar for purifying air or water. Taking the bark of the plane tree shed in summer as an example, a simple method for producing plane trees’ bark biochar by K2CO3 activation was presented. The method had advantages such as activation and carbonation in one step to prepare biochar. Research results showed that the prepared biochar had a large specific surface area of about 1193.290 m2/g. Then, the adsorption kinetics study revealed that the quasi-second-order kinetic model better described the adsorption process. Moreover, the adsorption process was better described by the Freundlich model. The maximum adsorption capacity of 1123 mg/g was in the range of 100–250 mg/L of MB. The main adsorption mechanism might involve hydrogen bonding, π-π* stacking, electrostatic interaction, and pore filling. This method could be utilized for the preparation of other types of activated carbon to ensure the efficient and comprehensive utilization of biomass.