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<p>The efficient recovery of uranium is of great significance for keeping water clean and protecting our environment. In this study, amino-functionalized SBA-15 (NH<sub>2</sub>-SBA-15) was synthesized for visible light-driven immobilization of uranyl after adsorption of uranyl from water. In simulated acidic U(VI) wastewater (pH = 5.0, C<sub>0</sub> = 50&#xa0;mg/L), the recovery of uranyl was 92.9% under 80&#xa0;min of light&#xa0;irradiation. XRD and XPS characterizations show uranyl species have transformed into hydrated uranyl peroxide. Controlled experiments demonstrated that introduction of the amino groups promote U(VI) adsorption and utilization of H<sub>2</sub>O<sub>2</sub>, thereby facilitating <i>in-situ</i> generation of (UO<sub>2</sub>)O<sub>2</sub>⋅4H<sub>2</sub>O.</p>

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Photoimmobilization of uranyl from aqueous solution by amino-functionalized SBA-15 under ambient conditions

  • 期刊论文

  • 发表日期：

    2025年8月21日

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  • Zhenfei Ou,
  • Yubao Zhao

摘要

The efficient recovery of uranium is of great significance for keeping water clean and protecting our environment. In this study, amino-functionalized SBA-15 (NH2-SBA-15) was synthesized for visible light-driven immobilization of uranyl after adsorption of uranyl from water. In simulated acidic U(VI) wastewater (pH = 5.0, C0 = 50 mg/L), the recovery of uranyl was 92.9% under 80 min of light irradiation. XRD and XPS characterizations show uranyl species have transformed into hydrated uranyl peroxide. Controlled experiments demonstrated that introduction of the amino groups promote U(VI) adsorption and utilization of H2O2, thereby facilitating in-situ generation of (UO2)O2⋅4H2O.