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<p>The safe treatment of uranium-containing wastewater poses a critical challenge to environment protection. Herein, biochar supported zero-valent iron (Fe<sup>0</sup>@MBC) were synthesized with maple ball. The effects of pH, dosage, initial U(VI) concentration and other factors were investigated. Consequently, Fe<sup>0</sup>@MBC exhibited 42.3 times higher immobilization capacity than MBC in simulated wastewater. Using 1.25&#xa0;g L<sup>−1</sup> Fe<sup>0</sup>@MBC in actual wastewater, removal efficiency reached 95.50%. Superior performance stems from synergistic adsorption-reduction: nZVI oxidized to iron oxides while partially reducing U(VI) to U(IV), and oxygen-containing groups (e.g., –OH) enhanced stabilization via coordination. This enables low-cost, efficient uranium immobilization in complex environments.</p>

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Performance and mechanism of uranium removal from wastewater by maple ball biochar (MBC) loaded with nano zero-valent iron

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • Huiran Tang,
  • Xiaowen Zhang,
  • Yanan Xiao,
  • Siyu Zhang,
  • Xiaoyan Wu,
  • Yilong Hua,
  • Zhaowen Cheng,
  • Mi Li,
  • Ying Peng

摘要

The safe treatment of uranium-containing wastewater poses a critical challenge to environment protection. Herein, biochar supported zero-valent iron (Fe0@MBC) were synthesized with maple ball. The effects of pH, dosage, initial U(VI) concentration and other factors were investigated. Consequently, Fe0@MBC exhibited 42.3 times higher immobilization capacity than MBC in simulated wastewater. Using 1.25 g L−1 Fe0@MBC in actual wastewater, removal efficiency reached 95.50%. Superior performance stems from synergistic adsorption-reduction: nZVI oxidized to iron oxides while partially reducing U(VI) to U(IV), and oxygen-containing groups (e.g., –OH) enhanced stabilization via coordination. This enables low-cost, efficient uranium immobilization in complex environments.