Photochemically triggered self-extraction of uranium from aqueous solution under ambient conditions

被引:59
作者
Hu, Yezi [1 ]
Tang, Duoyue [1 ]
Shen, Zewen [1 ]
Yao, Ling [1 ]
Zhao, Guixia [1 ]
Wang, Xiangke [1 ]
机构
[1] North China Elect Power Univ, Coll Environm Sci & Engn, Beijing 102206, Peoples R China
来源
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2023年 / 322卷
关键词
Uranium; Photochemical; Extraction; Visible light; Seawater; HYDROGEN-PEROXIDE; URANYL-ION; SEAWATER; RECOVERY; PHOTOCATALYSIS; PHOTOREDUCTION; STUDTITE; PHOTOOXIDATION; CHEMISTRY;
D O I
10.1016/j.apcatb.2022.122092
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Photocatalytic extraction of uranium from nuclear wastewater and seawater is a highly promising strategy to avoid environmental pollution and effectively recover uranium resources. Herein, we propose a novel strategy of photochemical for efficiently and high selectively extracting uranium from aqueous solution. The excited UO22+ at a suitable pH range were utilized for initiating the formation of hydrogen peroxide, which then directly reacted with UO22+ to form solid studtite (UO2)O-2 center dot 4 H2O. This photochemically triggered extraction approach could remove similar to 100.0% of UO22+ from aqueous solution with U(VI) concentration of 10.0-200.0 ppm, and 62.7% of UO22+ from U(VI)-spiked real seawater after 24 hrs-irradiation under visible light even without additional electron-donor agents. The highly selective and high extraction efficiency towards uranium ranged in extremely wide concentrations demonstrated the powerful application potential in both the removal of uranium from nuclear wastewater and the extraction of uranium from seawater. Data Availability: Data will be made available on request.
引用
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页数:10
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