Highly selective extraction of the uranyl ion with hydrophobic amidoxime-functionalized ionic liquids via η2 coordination

Barber, Peter W.; Kelley, Steven P.; Rogers, Robin D.

doi:10.1039/c2ra21344c

Cited by 105 publications

(76 citation statements)

References 37 publications

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“…Therefore C@N may exhibit similar properties of CAN bond, resulting in the decrease of peak intensity at 1652 cm À1 and the increase of that at 1532 cm À1 . The adsorption bond at 1096 cm À1 attributed to CAN [3,44] shows little shift after uranyl loaded, indicating that N atom in ANH 2 may not participate in the coordination or only play a minor role, which supports the M2 or g 2 coordination [45].…”

Section: Adsorption Mechanismmentioning

confidence: 96%

Recovery of uranyl from aqueous solutions using amidoximated polyacrylonitrile/exfoliated Na-montmorillonite composite

Han

Wang

et al. 2015

Chemical Engineering Journal

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Section: Adsorption Mechanismmentioning

confidence: 96%

Recovery of uranyl from aqueous solutions using amidoximated polyacrylonitrile/exfoliated Na-montmorillonite composite

Han

Wang

et al. 2015

Chemical Engineering Journal

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“…To understand the speciation of actinides and REs in ILs, Visser and Rogers investigated the coordination of U by extractants such as carbamoylphosphine oxide (CMPO) and TBP [13]. The extraction of UO 2 2+ with hydrophobic amidoxime-functionalized ILs has been reported, and it was found that high selectivity is obtained via η 2 coordination [14].…”

Section: Uniqueness Of Ils For the Separationmentioning

confidence: 98%

Ionic Liquids in the Context of Rare Earth Separation and Utilization

Chen

Gao

2016

Green Chemistry and Sustainable Technology

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With the rapid development of science and technology, rare earths (REs) are playing a vital role in economic and social development due to their unique electronic structure and physicochemical properties. REs are widely used in lighting, electrical, and magnetic field as a crucially strategic resource. Being the upstream of the RE industry supply chain, RE separation is crucial throughout the whole industry. The primary issues about RE separation are reviewed in this chapter. Conventional organic solvent extractants expose some inherent questions in the long-term application, while ionic liquids as "green solvents" show great potential in the separation processes. This chapter also overviewed RE resources in the world and the issues associated with these separation processes. A brief introduction to ionic liquid-based RE functional materials has been also made. Rare EarthsThe rare earths (REs) are a group of chemically similar elements in the entire periodic table, consisting of scandium (Sc), yttrium (Y), and the lanthanides. The lanthanides are the series of elements with atomic numbers from 57 to 71, including lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu).Based on the electronic structure and physicochemical properties, REs can be classified as light REs and heavy REs. Light REs are also called "cerium subgroup," including La, Ce, Pr, Nd, Sm, Eu, and Gd. Heavy REs are also called "yttrium

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“…This result suggests that the adsorption of UO 2 2+ on PAO/rGO composites is affected by the hydrolysis of UO 2 2+ ions and the protonation-deprotonation of PAO in aqueous solutions. Barber et al [18] and Zhang et al [28,29] reported that PAO is normally protonated in acidic solution, and that the protonation-deprotonation of PAO and the hydrolysis of UO 2 2+ ions in aqueous solution are important factors that affect the adsorption of UO 2 2+ on PAO-containing materials.…”

Section: +mentioning

confidence: 98%

“…Therefore, the introduction of proper functional groups onto GO surfaces is crucial for its real application in the high extraction of UO 2 2+ from seawater. Owing to its excellent affinity with UO 2 2+ , amidoxime (AO) was widely accepted as one of the most promising binding sites for UO 2 2+ due to its specific binding affinity with UO 2 2+ [15][16][17][18]. For this reason, modification of the GO surface with AO would thought to result in the high extraction of UO 2 2+ from seawater.…”

Section: Introductionmentioning

confidence: 99%

Poly(amidoxime)-reduced graphene oxide composites as adsorbents for the enrichment of uranium from seawater

Shao

Wang

2014

Sci. China Chem.

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The development of efficient materials for high extraction of uranium (UO 2 2+ ) from seawater is critical for nuclear energy. Poly(amidoxime)-reduced graphene oxide (PAO/rGO) composites with excellent adsorption capability for UO 2 2+ were synthesized by in situ polymerization of acrylonitrile monomers on GO surfaces, followed by amidoximation treatment with hydroxylamine. The adsorption capacities of PAO/rGO composites for UO 2 2+ reached as high as 872 mg/g at pH 4.0. The excellent tolerance of these composites for high salinity and their regeneration-reuse properties can be applied in the nuclear-fuel industry by high extraction of trace UO 2 2+ ions from seawater.

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Highly selective extraction of the uranyl ion with hydrophobic amidoxime-functionalized ionic liquids via η2 coordination

Cited by 105 publications

References 37 publications

Recovery of uranyl from aqueous solutions using amidoximated polyacrylonitrile/exfoliated Na-montmorillonite composite

Recovery of uranyl from aqueous solutions using amidoximated polyacrylonitrile/exfoliated Na-montmorillonite composite

Ionic Liquids in the Context of Rare Earth Separation and Utilization

Poly(amidoxime)-reduced graphene oxide composites as adsorbents for the enrichment of uranium from seawater

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