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Highly efficient uranium (VI) remove from aqueous solution using nano-TiO2-anchored polymerized dopamine-wrapped magnetic photocatalyst

文献类型： 外文期刊

作者： Zhang, Pan 1 ; Li, Heng 2 ; Wang, Yuhang 1 ; Song, Jiangfeng 3 ; Huang, Jiu 1 ; Li, Peng 1 ;

作者机构： 1.China Univ Min & Technol, Sch Environm Sci & Spatial Informat, Xuzhou 221008, Jiangsu, Peoples R China

2.270 Res Inst Nucl Ind, Nanchang 330013, Jiangxi, Peoples R China

3.Jiangsu Acad Agr Sci, Inst Agroprod Proc, Nanjing 210014, Peoples R China

关键词： Uranium containing wastewater; Adsorption and reduction; Interface engineering; TiO2; Magnetic photocatalyst

期刊名称：JOURNAL OF CLEANER PRODUCTION （ 影响因子：11.1； 五年影响因子：11.0 ）

ISSN： 0959-6526

年卷期： 2023 年 425 卷

页码：

收录情况： SCI

摘要： Radioactive uranium containing wastewater discharged from uranium mining and associated nonferrous metallurgy posing a serious threat to human health and aquatic ecosystem. In this paper, we attempted to use photocatalytic technology to reduction U(VI) from diluted uranium-containing wastewater and recover dispersed uranium by constructing a highly efficient photocatalyst. A polymerized dopamine (PDA)-wrapped magnetic base was introduced to support spherical anchoring of TiO2 nanoparticles, and the newly designed photocatalyst (TiO2/PDA@Fe3O4) with a particle size of 450-700 nm had a remarkable multilayer-ball structure and displayed remarkably high recyclability and photocatalytic reduction efficiency for aqueous uranium under UV radiation. Uranyl with an initial concentration of 2.0 mg/L, and solution pH of 6.0 was -100% removed within 40 min, and no interference by coexisting anionic and cation ions was not observed. In determination of photocatalytic mechanism, the results showed that nanoscale TiO2 particles on TiO2/PDA@Fe3O4 surface can adsorb U(VI) efficiently and reducing them under UV radiation. Furthermore, TiO2/PDA@Fe3O4 nanocomposites displayed high stability performance, the uranium removal efficiency was greater than 83.5% after six times recycle. The proposed engineered interface fabricate strategy has the potential for use in universal hydro-stable micro/nano-particle production and may contribute to more effective uranium extraction from waste liquids.

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