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<p>In the penicillin fermentation production industry, a large amount of waste bacterial residue is generated annually, posing significant potential risks to the environment. Currently, the most common method of disposal, incineration, wastes a considerable amount of biomass resources. This study utilizes penicillin fermentation bacterial residue as the raw material to prepare two types of high-performance magnetic biochar activated by KOH/K<sub>2</sub>FeO<sub>4</sub> (K<sub>2</sub>FeO<sub>4</sub>-BC, KOH/K<sub>2</sub>FeO<sub>4</sub>-BC) for the adsorption of ofloxacin. The results indicate that the addition of KOH effectively improves the biochar’s adsorption performance for ofloxacin. The BET specific surface areas of the two materials are 777.88 m<sup>2</sup>·g<sup>−1</sup> and 846.16 m<sup>2</sup>·g<sup>−1</sup>, respectively. The average mesopore diameter of KOH/K<sub>2</sub>FeO<sub>4</sub>-BC is 5.34 nm, and the mesopore volume accounts for over 99.5% of the total pore volume. At 298K, the saturated adsorption capacity of KOH/K<sub>2</sub>FeO<sub>4</sub>-BC for ofloxacin is 289.86 mg·g<sup>−1</sup>. The experiment demonstrates that the adsorption behavior of ofloxacin on KOH/K<sub>2</sub>FeO<sub>4</sub>-BC is more consistent with the Freundlich model and the second-order kinetic model. KOH/K<sub>2</sub>FeO<sub>4</sub>-BC achieves rapid removal of ofloxacin, with the adsorption removal effect reaching over 95% of adsorption saturation within 30 min. Repeated use experiments show that after five cycles, KOH/K<sub>2</sub>FeO<sub>4</sub>-BC retains 56.71% of its initial adsorption performance.</p> Graphical abstract <p></p>

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Study on the preparation of high specific surface area mesoporous biochar from penicillin fermentation residue by KOH/K2FeO4 activation and its adsorption effect on ofloxacin

  • 期刊论文

  • 发表日期：

    2025年1月7日

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  • Zhonghe Sun,
  • Qianhui Yang,
  • Mingxin Zhu,
  • Shunlong Pan,
  • Hua Zhou

摘要

In the penicillin fermentation production industry, a large amount of waste bacterial residue is generated annually, posing significant potential risks to the environment. Currently, the most common method of disposal, incineration, wastes a considerable amount of biomass resources. This study utilizes penicillin fermentation bacterial residue as the raw material to prepare two types of high-performance magnetic biochar activated by KOH/K2FeO4 (K2FeO4-BC, KOH/K2FeO4-BC) for the adsorption of ofloxacin. The results indicate that the addition of KOH effectively improves the biochar’s adsorption performance for ofloxacin. The BET specific surface areas of the two materials are 777.88 m2·g−1 and 846.16 m2·g−1, respectively. The average mesopore diameter of KOH/K2FeO4-BC is 5.34 nm, and the mesopore volume accounts for over 99.5% of the total pore volume. At 298K, the saturated adsorption capacity of KOH/K2FeO4-BC for ofloxacin is 289.86 mg·g−1. The experiment demonstrates that the adsorption behavior of ofloxacin on KOH/K2FeO4-BC is more consistent with the Freundlich model and the second-order kinetic model. KOH/K2FeO4-BC achieves rapid removal of ofloxacin, with the adsorption removal effect reaching over 95% of adsorption saturation within 30 min. Repeated use experiments show that after five cycles, KOH/K2FeO4-BC retains 56.71% of its initial adsorption performance.

Graphical abstract