Removal and Recovery of Uranium from Groundwater Using Direct Electrochemical Reduction Method: Performance and Implications

	Removal and Recovery of Uranium from Groundwater Using Direct Electrochemical Reduction Method: Performance and Implications
	Liu, Tian ; Yuan, Jili ; Zhang, Bo ; Liu, Wenbin ; Lin, Leiming ; Meng, Ying ; Yin, Shuangfeng ; Liu, Chengbin ; Luan, Fubo
	2019-12-17
Source Publication	ENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN	0013-936X
Volume	53 Issue:24 Pages:14612-14619
Abstract	Removal of uranium from groundwater is of great significance as compared to in situ bioimmobilization technology. In this study, a novel direct electro-reductive method has been developed to efficiently remove and recover uranium from carbonate-containing groundwater, where U(VI)O-2(CO3)(3)(4-) and Ca2U(VI)O-2(CO3)(3) are the dominant U species. The transferred electron calculations and XPS, XRD analyses confirmed that U(VI) was reduced to U(IV)O2 and accumulated on the surface of the Ti electrode (defined as Ti@U(IV)O-2 electrode) with high current efficiencies (over 90.0%). Moreover, over 98.0% of the accumulated U(IV)O-2 could be recovered by soaking the Ti@U(IV)O-2 electrode in the dilute nitric acid. Results demonstrated that the accumulated U(IV)O-2 on the surface of the Ti electrode played a key role in the removal of U(VI), which can promote the electro-reduction of U(VI). Therefore, the electrode could be used repeatedly and has a high removal capacity of U(VI) due to the continuous accumulation of active U(IV)O-2 on the surface of the electrode. Significantly, the uranium in both real and high salinity groundwater can be efficiently removed. This study implies that the proposed direct electro-reductive method has great potential for the removal and recovery of uranium from groundwater and uranium-containing wastewater.
Department	中国科学院饮用水科学与技术重点实验室
Document Type	期刊论文
Identifier	https://ir.rcees.ac.cn/handle/311016/43514
Collection	中国科学院饮用水科学与技术重点实验室
Affiliation	1.Hunan Univ, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation GB/T 7714	Liu, Tian,Yuan, Jili,Zhang, Bo,et al. Removal and Recovery of Uranium from Groundwater Using Direct Electrochemical Reduction Method: Performance and Implications[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2019,53(24):14612-14619.
APA	Liu, Tian.,Yuan, Jili.,Zhang, Bo.,Liu, Wenbin.,Lin, Leiming.,...&Luan, Fubo.(2019).Removal and Recovery of Uranium from Groundwater Using Direct Electrochemical Reduction Method: Performance and Implications.ENVIRONMENTAL SCIENCE & TECHNOLOGY,53(24),14612-14619.
MLA	Liu, Tian,et al."Removal and Recovery of Uranium from Groundwater Using Direct Electrochemical Reduction Method: Performance and Implications".ENVIRONMENTAL SCIENCE & TECHNOLOGY 53.24(2019):14612-14619.

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