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<p>In this paper, a biochar was prepared through hydrothermal carbonization, followed by activation with KOH and pyrolysis, using waste bamboo powder as the feedstock. The efficiency of the KOH-activated bamboo biochar (KBB) as an adsorbent for the antibiotic levofloxacin (LEV) was studied. Results indicated that the maximum specific surface area, mesoporous specific surface area, and total pore volume of KBB sample, designated as HK-80-BC-800–1.5, was obtained under the conditions of 80&#xa0;g/L KOH, 800&#xa0;°C pyrolysis temperature, and 1.5&#xa0;h residence time, holding a LEV adsorption capacity of 178.0&#xa0;mg/g. Following optimization of the adsorption process, a corresponding Langmuir adsorption maximum of 277.0&#xa0;mg/g for LEV was simulated under the conditions of 20&#xa0;mg/L initial LEV, 10&#xa0;mg adsorbent, and pH 7.0. Besides, the adsorption mechanisms were determined by analyzing the adsorption kinetics and adsorption isotherms and characterizing the samples before and after adsorption. The findings suggest that pore filling, hydrophobic interaction, and hydrogen bonding force are crucial in the adsorption of LEV by KBB.</p> Graphical Abstract <p></p>

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Efficient Adsorption of Antibiotic Levofloxacin using KOH-Activated Bamboo Biochar

  • 期刊论文

  • 发表日期：

    2026年2月20日

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  • Zhen Li,
  • Lian Tang,
  • Min Tang,
  • Peng Zhan,
  • Ke Ouyang,
  • Zhiping Wu

摘要

In this paper, a biochar was prepared through hydrothermal carbonization, followed by activation with KOH and pyrolysis, using waste bamboo powder as the feedstock. The efficiency of the KOH-activated bamboo biochar (KBB) as an adsorbent for the antibiotic levofloxacin (LEV) was studied. Results indicated that the maximum specific surface area, mesoporous specific surface area, and total pore volume of KBB sample, designated as HK-80-BC-800–1.5, was obtained under the conditions of 80 g/L KOH, 800 °C pyrolysis temperature, and 1.5 h residence time, holding a LEV adsorption capacity of 178.0 mg/g. Following optimization of the adsorption process, a corresponding Langmuir adsorption maximum of 277.0 mg/g for LEV was simulated under the conditions of 20 mg/L initial LEV, 10 mg adsorbent, and pH 7.0. Besides, the adsorption mechanisms were determined by analyzing the adsorption kinetics and adsorption isotherms and characterizing the samples before and after adsorption. The findings suggest that pore filling, hydrophobic interaction, and hydrogen bonding force are crucial in the adsorption of LEV by KBB.

Graphical Abstract