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<p>This study reports the synthesis of titanium dioxide (TiO<sub>2</sub>) incorporated hydroxyapatite (HAp) composites (HAp@TiO<sub>2</sub>) for uranium (U(VI)) removal from aqueous solution. The nanocomposite exhibited dandelion flower-like morphology with enhanced surface area. Batch adsorption studies were conducted to study the influence of pH, contact time, initial uranium concentration, and temperature on U(VI) adsorption. It exhibited a maximum adsorption capacity of 231.48&#xa0;mg&#xa0;g<sup>−1</sup>, and equilibrium was achieved within 55&#xa0;min. Adsorption of U(VI) on HAp@TiO<sub>2</sub> occurs via ion exchange, surface complexation and electrostatic interaction with Ca<sup>2+</sup>, OH<sup>−</sup> and PO<sub>4</sub><sup>3−</sup> groups. These results demonstrate HAp@TiO<sub>2</sub> as a promising adsorbent for U(VI) contaminated wastewater.</p>

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Multimechanistic uranium sequestration using flower-like hydroxyapatite@titanium dioxide hybrid structures

  • 期刊论文

  • 发表日期：

    2025年9月18日

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  • M. Ashwini,
  • N. Priyadarshini

摘要

This study reports the synthesis of titanium dioxide (TiO2) incorporated hydroxyapatite (HAp) composites (HAp@TiO2) for uranium (U(VI)) removal from aqueous solution. The nanocomposite exhibited dandelion flower-like morphology with enhanced surface area. Batch adsorption studies were conducted to study the influence of pH, contact time, initial uranium concentration, and temperature on U(VI) adsorption. It exhibited a maximum adsorption capacity of 231.48 mg g−1, and equilibrium was achieved within 55 min. Adsorption of U(VI) on HAp@TiO2 occurs via ion exchange, surface complexation and electrostatic interaction with Ca2+, OH− and PO43− groups. These results demonstrate HAp@TiO2 as a promising adsorbent for U(VI) contaminated wastewater.