Magnetic amidoxime-functionalized MXenes for efficient adsorption and immobilization of U(VI) and Th(IV) from aqueous solution

Liu, Fenglei; Hu, Zhengfeng; Xiang, Miao; Hu, Baowei

doi:10.1016/j.apsusc.2022.154227

Cited by 26 publications

(8 citation statements)

References 42 publications

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“…The TBP-impregnated sorbent was reported to have a higher affinity for UO 2 2+ than for Th 4+ , which is completely reverse to the present case . Magnetic MXene-based composites and hydrated MnO 2 also showed promising sorption capacity for UO 2 2+ as well as Th 4+ . , …”

Section: Resultscontrasting

confidence: 42%

Novel N-Substituted 2,2′-Oxydiacetic Acid Diamide-Functionalized Silica Resins: An Efficient Sorbent for Removal of U(VI) and Th(IV) Present in Nitric Acid-Rich Effluents

Khan,

Pahan,

Sengupta

et al. 2023

Ind. Eng. Chem. Res.

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Section: Resultscontrasting

confidence: 42%

Novel N-Substituted 2,2′-Oxydiacetic Acid Diamide-Functionalized Silica Resins: An Efficient Sorbent for Removal of U(VI) and Th(IV) Present in Nitric Acid-Rich Effluents

Khan,

Pahan,

Sengupta

et al. 2023

Ind. Eng. Chem. Res.

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“…With the increase of solution pH, the surface charge of IEF-11 gradually becomes negative, while more active atomic sites in IEF-11 are exposed and bound to metal ions. This leads to the increase of Th(IV) ion adsorption on IEF-11. , However, from the distribution of thorium species (Figure b), it can be found that severe hydrolysis occurs at pH > 3.0. The present form of Th(IV) gradually changes from Th 4+ to Th 4 (OH) 12 4+ , which is more easier to be precipitated and unfavorable for the adsorption .…”

Section: Results and Discussionmentioning

confidence: 95%

“…The first stage is dominated by surface diffusion with a fast adsorption rate, due to large driven force from concentration difference and abundant active sites on the adsorbent surface. Subsequently, diffusion from the surface into the interior channel dominates the adsorption, and the adsorption rate begins to slow down due to the gradually occupied active sites and decreased concentration difference driven force. , …”

Section: Results and Discussionmentioning

confidence: 99%

“…This leads to the increase of Th(IV) ion adsorption on IEF-11. 25,45 However, from the distribution of thorium species (Figure 4b), it can be found that severe hydrolysis occurs at pH > 3.0. The present form of Th(IV) gradually changes from Th 4+ to Th 4 (OH) 12 4+ , which is more easier to be precipitated and unfavorable for the adsorption.…”

Section: Stability Analysismentioning

confidence: 97%

“…Subsequently, diffusion from the surface into the interior channel dominates the adsorption, and the adsorption rate begins to slow down due to the gradually occupied active sites and decreased concentration difference driven force. 45,47 3.3.3. Adsorption Isotherms and Thermodynamics.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

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Efficient Capture of Th(IV) and U(VI) by Radiation-Resistant Oxygen-Rich Ion Traps Based on a Metal–Organic Framework

Chen

Gan

Xiao

et al. 2023

ACS Appl. Mater. Interfaces

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Herein, based on a well-stabilized Ti-MOF (IEF-11), an oxygen-rich ion trap with synergy interaction of active atoms was proposed for the removal of Th(IV) and U(VI) from aqueous solutions. Due to the high coordination number of Ti and compact framework structure, IEF-11 has excellent resistance toward β-ray irradiation, even under 1000 kGy irradiation dosage. Meanwhile, owing to the special chelating effect of the oxygen-rich ion traps, the maximum adsorption amounts of IEF-11 for Th(IV) (pH = 3.0) and U(VI) (pH = 5.0) ions can reach 305.9 and 240.7 mg g–1, and the separation coefficients exceed 200 for Th(IV)/Nd(III), Th(IV)/Sm(III), and Th(IV)/Eu(III) and 100 for U(VI)/Eu(III), U(VI)/La(III), and U(VI)/Sr(II). Moreover, IEF-11 shows fast adsorption kinetics with an equilibrium time of ∼100 min. The adsorption amount almost remains even after four adsorption–desorption cycles. Finally, experimental and theoretical calculations indicate that Th(IV) and U(VI) ions are anchored in the ion trap in the form of chemical bonds. Meanwhile, the circular pore trap (class I trap) than the long pore trap (class II trap) is considered to be the better adsorption site. We expect that our work will provide a new insight for constructing effective adsorbents for radioactive nuclides.

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Hierarchical Porous Amidoximated Metal–Organic Framework for Highly Efficient Uranium Extraction

Li,

Tuo,

Fan

et al. 2023

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With the rapid development of industry and technology, high‐efficiency extraction of uranium from seawater is a research hotspot from the aspect of nuclear energy development. Herein, a new amidoximated metal–organic framework (UiO‐66‐DAMN‐AO) constructed through a novel organic ligand of 2‐diaminomaleonitrile‐terephthalic acid (BDC‐DAMN) is designed via one‐step post‐synthetic methods (PSM), which possess the merit of abundant multiaffinity sites, large specific surface area, and unique porous structure for efficient uranium extraction. Adopting one‐step PSM can alleviate the destruction of structural stability and the reduction of the conversion rate of amidoxime groups. Meanwhile, introducing the BDC‐DAMN ligand with abundant multiaffinity sites endow UiO‐66‐DAMN‐AO with excellent adsorption ability (Qm = 426.3 mg g−1) and selectivity. Interestingly, the UiO‐66‐DAMN‐AO has both micropores and mesopores, which may be attributed to the partial etching of UiO‐66‐DAMN‐AO during the amidoximation. The presence of mesopores improves the mass transfer rate of UiO‐66‐DAMN‐AO and provides more exposed active sites, favoring the adsorption of uranium on UiO‐66‐DAMN‐AO. Thus, this study provides a feasible strategy for modifying metal–organic framework (MOFs) with plentiful amidoxime groups and the promising prospect for MOF‐based materials to adsorb uranium from ocean.

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Magnetic amidoxime-functionalized MXenes for efficient adsorption and immobilization of U(VI) and Th(IV) from aqueous solution

Cited by 26 publications

References 42 publications

Novel N-Substituted 2,2′-Oxydiacetic Acid Diamide-Functionalized Silica Resins: An Efficient Sorbent for Removal of U(VI) and Th(IV) Present in Nitric Acid-Rich Effluents

Novel N-Substituted 2,2′-Oxydiacetic Acid Diamide-Functionalized Silica Resins: An Efficient Sorbent for Removal of U(VI) and Th(IV) Present in Nitric Acid-Rich Effluents

Efficient Capture of Th(IV) and U(VI) by Radiation-Resistant Oxygen-Rich Ion Traps Based on a Metal–Organic Framework

Hierarchical Porous Amidoximated Metal–Organic Framework for Highly Efficient Uranium Extraction

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