Issue 8, 2023

Achieving efficient uranium extraction by in situ ultrasonic texturization of commercial Fe powder

Abstract

The widespread presence of fluorinated nuclear effluent (F) in the nuclear fuel cycle encourages the efficient extraction of hexavalent uranium (U(VI)) under interference by F. Nano zero-valent iron (n-ZVI) is a promising material for U(VI) extraction but it suffers from labor-intensive production and storage procedures. Herein, we reported on the in situ ultrasonic texturization of commercial Fe powder for U(VI) extraction in F-containing wastewater to replace n-ZVI. At various molar ratios of F/U(VI), the uranium extraction efficiency of commercial Fe powder under ultrasonic conditions remained at a high value of >90% within 120 min. Moreover, the ultrasonic texturization of commercial Fe powder made it applicable in a wide pH range from 2 to 9, which remarkably outperformed a reported n-ZVI sample at pH < 4. Mechanistic studies revealed that the Kirkendall effect of the reduction reaction and mechanical disturbance by the ultrasonication induced the surface texturization of the commercial Fe powder, leading to the in situ construction of n-ZVI and thus continually providing reduction sites for U(VI).

Graphical abstract: Achieving efficient uranium extraction by in situ ultrasonic texturization of commercial Fe powder

Supplementary files

Article information

Article type
Paper
Submitted
29 apr 2023
Accepted
07 iyl 2023
First published
13 iyl 2023

Environ. Sci.: Nano, 2023,10, 2201-2210

Achieving efficient uranium extraction by in situ ultrasonic texturization of commercial Fe powder

B. Zhu, H. Wu, J. Kang, X. Yu, T. Chen, R. Cheng, G. Yang, W. Bai, W. Zhu and R. He, Environ. Sci.: Nano, 2023, 10, 2201 DOI: 10.1039/D3EN00269A

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