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<p>In this study, magnetic Hami-melon peels biochar (MHPBC) was successfully prepared from Hami-melon peels. Characterisation results showed that Fe<sub>3</sub>O<sub>4</sub> particles were successfully loaded on the surface of the material, conferring good magnetic properties. The analysis of the adsorption mechanism showed that the removal of U(VI) mainly relied on electrostatic interaction with the complexation of oxygen-containing functional groups on the surface, and no redox reaction was involved. After five adsorption–desorption cycles, the removal rate of U(VI) by the material remained above 90%, showing good stability and reusability. Kinetic and isothermal adsorption fitting analyses showed that the adsorption process was consistent with the monomolecular layer chemisorption mechanism. It was shown that MHPBC demonstrated efficient recycling ability and reusability, and could be used as a very promising low-cost adsorbent.</p>

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Adsorption characteristics and mechanism of uranium removal from radioactive wastewater using magnetic biochar prepared from Hami-melon peels

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • Zhengyan Li,
  • Chengxin Li,
  • Guangwen Feng,
  • Changlong Cai

摘要

In this study, magnetic Hami-melon peels biochar (MHPBC) was successfully prepared from Hami-melon peels. Characterisation results showed that Fe3O4 particles were successfully loaded on the surface of the material, conferring good magnetic properties. The analysis of the adsorption mechanism showed that the removal of U(VI) mainly relied on electrostatic interaction with the complexation of oxygen-containing functional groups on the surface, and no redox reaction was involved. After five adsorption–desorption cycles, the removal rate of U(VI) by the material remained above 90%, showing good stability and reusability. Kinetic and isothermal adsorption fitting analyses showed that the adsorption process was consistent with the monomolecular layer chemisorption mechanism. It was shown that MHPBC demonstrated efficient recycling ability and reusability, and could be used as a very promising low-cost adsorbent.