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<p>U(VI) and levofloxacin (LEV) are co-existing pollutants in medical wastewater, and the interaction between them results in poor removal. Phosphorus-based biochar (PBC) was prepared to simultaneously remove U(VI) and LEV. In the single system, the optimal adsorption pH values for U(VI) and LEV were 5.0 and 7.0, respectively, with maximum adsorption capacities of 803.64&#xa0;mg/g and 46.71&#xa0;mg/g, and complex precipitation and hydrogen bonding were the main adsorption mechanisms. In the binary system, the removal of LEV by U(VI) showed inhibitory effects at pH &lt; 3.0 and pH &gt; 6.0. At pH = 4.0, U(VI) demonstrated a promoting effect on LEV removal. Complex precipitation and cation-π interactions were the main synergistic mechanism. Desorption regeneration experiments indicated that PBC has good reusability.</p>

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Removal of U(VI) and levofloxacin from aqueous solution by phosphorus-based biochar: investigation of single reaction and synergistic mechanism of action

  • 期刊论文

  • 发表日期：

    2025年7月3日

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  • Yunfei Hu,
  • Zhitao Dong,
  • Shuibo Xie,
  • Lantao Zhang,
  • Yitao Qiu

摘要

U(VI) and levofloxacin (LEV) are co-existing pollutants in medical wastewater, and the interaction between them results in poor removal. Phosphorus-based biochar (PBC) was prepared to simultaneously remove U(VI) and LEV. In the single system, the optimal adsorption pH values for U(VI) and LEV were 5.0 and 7.0, respectively, with maximum adsorption capacities of 803.64 mg/g and 46.71 mg/g, and complex precipitation and hydrogen bonding were the main adsorption mechanisms. In the binary system, the removal of LEV by U(VI) showed inhibitory effects at pH < 3.0 and pH > 6.0. At pH = 4.0, U(VI) demonstrated a promoting effect on LEV removal. Complex precipitation and cation-π interactions were the main synergistic mechanism. Desorption regeneration experiments indicated that PBC has good reusability.