Sorption of Pu in various oxidation states onto multiwalled carbon nanotubes

Перевалов, С. А.; Molochnikova, N. P.

doi:10.1007/s10967-009-0003-0

Cited by 31 publications

(7 citation statements)

References 14 publications

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“…As one can see, the SPE behavior of plutonium in various oxidation states differs rather considerably. The polymerized forms of Pu(IV) are sorbed rather effectively during passing the first 50 mL of the solution, that is due to a high sorption affinity of polymeric plutonium macromolecules [ 11 – 13 ]. Further passing the solution results in an increase of plutonium concentration in the effluent that may be attributed to the reduction of Pu(IV) to Pu(III) under the action of BPHA, as reported in [ 8 ], or to plutonium disproportionation [ 14 ]: …”

Section: Resultsmentioning

confidence: 99%

Solid-phase extraction of plutonium in various oxidation states from simulated groundwater using N-benzoylphenylhydroxylamine

Перевалов

Malofeeva

Kuzovkina

et al. 2011

J Radioanal Nucl Chem

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Solid-phase extraction of plutonium in different individual and mixed oxidation states from simulated groundwater (pH 8.5) was studied. The extraction of plutonium species was carried out in a dynamic mode using DIAPAK C16 cartridges modified by N-benzoylphenylhydroxylamine (BPHA). It was shown that the extent of recovery depends on the oxidation state of plutonium. The extraction of Pu(IV) was at the level of 98–99% regardless of the volume and flow-rate of the sample solution. Pu(V) was extracted by 90–95% and 75–80% from 10- and 100-mL aliquots of the samples, respectively, whereas the extraction of Pu(VI) did not exceed 45–50%. An equimolar mixture of Pu(IV), Pu(V), and Pu(VI) was extracted by 74%. The distribution coefficients (Kd) and kinetic exchange capacities (S) of plutonium in various oxidation states were measured. It was found that during the sorption process, Pu(V) was reduced to Pu(IV) by 80–90% after an hour-long contact with the solid phase. Pu(VI) is reduced to Pu(V) by 34% and to Pu(IV) by 55%. In the case of mixed-valent solution of plutonium, only Pu(V) and Pu(IV) were found in the effluents.

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Section: Resultsmentioning

confidence: 99%

Solid-phase extraction of plutonium in various oxidation states from simulated groundwater using N-benzoylphenylhydroxylamine

Перевалов

Malofeeva

Kuzovkina

et al. 2011

J Radioanal Nucl Chem

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“…Radionuclides were bound to nanotubes by ions exchange and chemisorption [e.g. U(VI) onto O-MWCNTs 193 mmol g À1 ] (Perevalov and Molochnikova, 2009;Fasfous and Dawoud, 2012;Wang et al, 2011a,b).…”

Section: Adsorption Of Heavy Metal Ions and Aromatic Compounds On Cntmentioning

confidence: 99%

Interactions of carbon nanotubes with aqueous/aquatic media containing organic/inorganic contaminants and selected organisms of aquatic ecosystems – A review

et al. 2015

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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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Sorption of Pu in various oxidation states onto multiwalled carbon nanotubes

Cited by 31 publications

References 14 publications

Solid-phase extraction of plutonium in various oxidation states from simulated groundwater using N-benzoylphenylhydroxylamine

Solid-phase extraction of plutonium in various oxidation states from simulated groundwater using N-benzoylphenylhydroxylamine

Interactions of carbon nanotubes with aqueous/aquatic media containing organic/inorganic contaminants and selected organisms of aquatic ecosystems – A review

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

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