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Journal of Hazardous Materials

Journal of Hazardous Materials

IF: 12.2
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Carbonate Composite Materials for the Leaching Remediation of Uranium-Contaminated Soils: Mechanistic Insights and Engineering Applications

Published:7 December 2024 DOI: 10.1016/j.jhazmat.2024.136814
Juncheng Han, Guangming Xu, Xinyao Liu, Likun Jiang, Kexin Shao, Haotian Yang, Guangsheng Zhu, Aizhong Ding, Zhaorong Shang, Chen Ling, Junfeng Dou

Abstract

In this study, a composite leaching agent consisting of Na2CO3, NaHCO3, H2O2, and deep eutectic solvents was synthesized, and its composition and application conditions were optimized to mitigate soil contamination resulting from uranium mining. Laboratory and pilot field tests revealed that the use of this agent facilitated up to 92.6% removal of uranium from contaminated soils. Analytical characterization through X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS) revealed that CO32- readily formed complexes with uranium, increasing its mobility and desorption from soil particles. The safety of the leaching process was confirmed through plant growth tests and enzyme activity assays. Moreover, the leaching strategy not only adheres to environmentally sustainable principles but also replenishes carbon and nitrogen in the soil, thereby aiding in the restoration of its functional use.

Substances (4)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Sodium carbonate 497-19-8 CH2O3.2Na 1714 suppliers $14.00-$5120.00
Sodium bicarbonate 144-55-8 CH2O3.Na 1698 suppliers $10.00-$5020.00
Potassium carbonate 584-08-7 K2CO3 1429 suppliers $5.00-$8000.00
Potassium bicarbonate 298-14-6 CHKO3 602 suppliers $6.00-$1550.00

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