Sorption preconcentration of radionuclides on Taunit carbon nanostructural material

Myasoedova, G. V.; Molochnikova, N. P.; Ткачев, А. Г.; Туголуков, Е. Н.; Mishchenko, S. V.; Myasoedov, Β. F.

doi:10.1134/s1066362209020106

Cited by 12 publications

(3 citation statements)

References 12 publications

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“…Although activated carbons have large pore volumes and surface areas, they tend to be disordered, with variable pore sizes. Carbon nanotubes are more uniform and have been explored for actinide and lanthanide extraction, [20][21][22][23][24][25][26][27] but their uptake capacities may be limited by relatively low specic surface areas. Most recently graphene oxide has been studied for sorption of Eu(III) 28,29 and other radionuclides, 29 showing improved uptake kinetics and sorption capacities compared to nanotubes and activated carbons.…”

Section: Introductionmentioning

confidence: 99%

Sorption interactions of plutonium and europium with ordered mesoporous carbon

et al. 2014

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Section: Introductionmentioning

confidence: 99%

Sorption interactions of plutonium and europium with ordered mesoporous carbon

et al. 2014

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“…Subsequent uses of carbons have included these and many other applications [3] and activated carbons have become the most ubiquitous materials for use in water purification worldwide, even though they are costly [4]. A particularly important application is the adsorption of radionuclides for environmental remediation [5,6], nuclear waste management [7,8,9,10], and biomedical applications [11]. In activated carbons, van der Waals forces are mainly responsible for surface adsorption, thus, carbon nanotubes, which have demonstrated chemisorption resulting in high adsorption capacities, are starting to attract interest [8].…”

Section: Introductionmentioning

confidence: 99%

Actinide and Lanthanide Adsorption onto Hierarchically Porous Carbons Beads: A High Surface Affinity for Pu

Luca

Sizgek

et al. 2019

Nanomaterials

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Structured carbon adsorbents were prepared by carbonizing macroporous polyacrylonitrile beads whose pores were lined with a mesoporous phenolic resin. After activation, the beads were tested for minor actinide (Np and Am), major actinide (Pu and U) and lanthanide (Gd) adsorption in varying acidic media. The activation of the carbon with ammonium persulfate increased the surface adsorption of the actinides, while decreasing lanthanide adsorption. These beads had a pH region where Pu could be selectively extracted. Pu is one of the longest lived, abundant and most radiotoxic components of spent nuclear fuel and thus, there is an urgent need to increase its security of storage. As carbon has a low neutron absorption cross-section, these beads present an affordable, efficient and safe means for Pu separation from nuclear waste.

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“…Oxidized CNTs show promise as sorption material for concentrating metal microimpurities from neutral and weakly acidic solutions by solid-phase extraction [4]. However, such materials exhibit low selectivity, and their performance in sorption of actinides and REE(III) from acid solutions is insufficient [5][6][7]. The performance and selectivity of carbon sorbents can be enhanced by their modification with organic complexing agents.…”

mentioning

confidence: 98%

1,3-Bis[(diphenylphosphorylacetamido)methyl]benzene as reagent for extraction and sorption preconcentration of REE(III), U(VI), and Th(IV) from nitric acid solutions

et al. 2012

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The extraction of microamounts of REE(III), U(VI), and Th(IV) from HNO 3 solutions in the form of complexes with a polyfunctional neutral organophosphorus compound, 1,3-bis[(diphenylphosphorylacetamido)-methyl]benzene, was studied. The influence exerted by the structure of the bridge binding two carbamoylmethylphosphine oxide fragments on the efficiency of the extraction of REE(III), U(VI), and Th(IV) and on the stoichiometry of the extractable complexes was analyzed. The possibility of recovering and concentrating REE(III), U(VI), and Th(IV) from nitric acid solutions with a complexing sorbent prepared by noncovalent immobilization of 1,3-bis[(diphenylphosphorylacetamido)methyl]benzene on the surface of carbon nanotubes was examined.Sorption methods are widely used for recovering and concentrating metal microimpurities from aqueous solutions containing large amount of salts of other metals [1]. Recently there has been a great deal of interest in sorption preconcentration of actinides and rare-earth elements (REE) from nitric acid solutions using sorbents prepared by noncovalent immobilization of organic reagents containing complexing functional groups on a solid matrix [2]. One of requirements imposed on the matrix is sufficiently high capacity for the organic reagent. This parameter, in turn, determines the sorbent capacity for the metal ion being recovered. High capacity for organic reagents is usually ensured by using materials with a high specific surface area. In this respect, carbon nanotubes (CNTs) are of indubitable interest. It was shown that these materials exhibit high sorption capacity for organic substances, compared to other carbon sorbents [3]. Oxidized CNTs show promise as sorption material for concentrating metal microimpurities from neutral and weakly acidic solutions by solid-phase extraction [4]. However, such materials exhibit low selectivity, and their performance in sorption of actinides and REE(III) from acid solutions is insufficient [5][6][7]. The performance and selectivity of carbon sorbents can be enhanced by their modification with organic complexing agents. The possibility of REE(III) preconcentration from nitric acid solutions using CNTs modified with tetraphenylmethylenediphosphine dioxide (TPMDPO) was demonstrated [8].It is known that the sorption properties of modified sorbents are largely determined by the complexing and extraction properties of the immobilized organic reagents toward the ions being recovered [9, 10]. Bidentate neutral organophosphorus compounds, in particular, (dialkylcarbamoylmethyl)diarylphosphine oxides (CMPOs), exhibit high ability to extract actinides and REE(III) from nitric acid solutions [11]. Secondary alkylamides of diphenylphosphorylacetic acid Ph 2 P(O)· CH 2 C(O)NHAlk (where Alk = alkyl C 2 -C 12 ) also showed high performance in the extraction of actinide and REE(III) ions. In the efficiency of the Am(III) recovery from nitric acid solutions, they well compete with their N,N-dialkyl-substituted analogs used in the practice and are considerably e...

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Sorption preconcentration of radionuclides on Taunit carbon nanostructural material

Cited by 12 publications

References 12 publications

Sorption interactions of plutonium and europium with ordered mesoporous carbon

Sorption interactions of plutonium and europium with ordered mesoporous carbon

Actinide and Lanthanide Adsorption onto Hierarchically Porous Carbons Beads: A High Surface Affinity for Pu

1,3-Bis[(diphenylphosphorylacetamido)methyl]benzene as reagent for extraction and sorption preconcentration of REE(III), U(VI), and Th(IV) from nitric acid solutions

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