<p>Fluoride control is essential for radiotracer production in positron emission tomography and safe drinking water. This work reports a series of La/ZrP-MOF adsorbents with tunable La/Zr molar ratios for efficient fluoride capture. Among them, La/ZrP-MOF-3 exhibited the best adsorption performance, achieving a maximum fluoride ion adsorption capacity of 50.44&#xa0;mg/g at pH 5, together with high selectivity and structural stability. The enhanced adsorption is attributed to a synergistic mechanism involving surface hydroxyl group exchange and strong lanthanum-fluorine coordination. This study provides valuable insights into the rational design of advanced MOF-based adsorbents for fluoride removal in both radiochemical and environmental applications.</p>

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A hydrothermally synthesized La/ZrP-MOF with synergistic adsorption mechanism for fluoride ion adsorption

  • Chunhui Gong,
  • Shuting Wang,
  • Zuliang Wang,
  • Aotian Gu,
  • Mingjian Sang,
  • Jiarui Meng,
  • Peng Wang,
  • Yi Yang

摘要

Fluoride control is essential for radiotracer production in positron emission tomography and safe drinking water. This work reports a series of La/ZrP-MOF adsorbents with tunable La/Zr molar ratios for efficient fluoride capture. Among them, La/ZrP-MOF-3 exhibited the best adsorption performance, achieving a maximum fluoride ion adsorption capacity of 50.44 mg/g at pH 5, together with high selectivity and structural stability. The enhanced adsorption is attributed to a synergistic mechanism involving surface hydroxyl group exchange and strong lanthanum-fluorine coordination. This study provides valuable insights into the rational design of advanced MOF-based adsorbents for fluoride removal in both radiochemical and environmental applications.