Flexible self-supporting Na3MnTi(PO4)3@C fibers for uranium extraction from seawater by electro sorption

Chen, Yuliang; Yin, Xiangbiao; Zheng, Ningchao; Lin, Zheyang; Fujita, Toyohisa; Ning, Shunyan; Chen, Yanliang; Wang, Xinpeng

doi:10.1016/j.jhazmat.2023.132664

Cited by 9 publications

(1 citation statement)

References 38 publications

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“…Increasing adsorption sites (or binding sites), which are generally comprised of donor sites or defects on the electrode surface, can also improve the efficiency and selectivity of uranium removal. These sites can be provided intrinsically by choosing the right electrode materials or through surface modification [56][57][58]. For example, two-dimensional MoS2 is a pseudocapacitive material with a naturally high affinity for UO2 2+ [48].…”

Section: Capacitive Deionization (Electrosorption)mentioning

confidence: 99%

Electrochemical Techniques for Uranium Extraction from Water

Raj,

Carrier,

Youden

et al. 2024

Preprint

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Electrochemical removal of uranium from water is an emerging topic that addresses the treatment of drinking water, remediation of contaminated sites, and mining from seawater. Electrochemical strategies compare favorably to conventional processes, such as adsorption and coagulation/flocculation, with advantages in speed and efficiency, materials regeneration, uranium recovery, and recycling. This review assesses all published work on electrochemical techniques for uranium extraction from water, including capacitive deionization (electrosorption), electrodeposition, electrodialysis, and electrocoagulation. This work compares these approaches with conventional techniques and discusses their applicability in different use cases. Environmental and economic considerations are discussed, as well as the current outlook and opportunities for engagement in this emerging field.

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Section: Capacitive Deionization (Electrosorption)mentioning

confidence: 99%

Electrochemical Techniques for Uranium Extraction from Water

Raj,

Carrier,

Youden

et al. 2024

Preprint

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A Supramolecular Organic Framework‐Mediated Electrochemical Strategy Achieves Highly Selective and Continuous Uranium Extraction

Wang,

Xu,

Wang

et al. 2024

Adv Funct Materials

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The integration of selectivity and electron transfer ability remains a primary challenge in developing electrode materials for uranium electroextraction. Herein, a phenanthroline‐based supramolecular organic framework (MPSOF) is elaborately constructed as a pioneering cathode material through the hydrogen bond‐driven self‐assembly of melamine and 1,10‐phenanthroline 2,9‐dicarboxylic acid (PDA) for selective and continuous electrochemical uranium extraction (EUE). PDA moieties selectively capture UO22+, while the hydrogen bond‐supporting frameworks provide an efficient electron transfer channel for the redox of UO22+. These structural features enable the rapid formation and spontaneous shedding of uranium precipitate from MPSOF, allowing for the regeneration of the selective adsorption sites. As a result, MPSOF‐mediated EUE exhibits a high extraction capacity of 7311 mg U g−1 at a low voltage of −3.5 V but does not reach equilibrium. Cyclic EUE is employed to uranium extraction from simulated high‐salt radioactive effluents and attains high selectivity for uranium. The electroextraction mechanism is confirmed, wherein uranium species transform into (UO2)O2·4H2O. This work not only provides an efficient electrode material for uranium electroextraction, but also presents a novel electrochemical strategy for separation and adsorption of other radionuclides and contaminant ions.

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