Solid-phase extractants for radionuclide preconcentration and separation. New possibilities

Mokhodoeva, O. B.; Myasoedova, G. V.; Zakharchenko, E. A.

doi:10.1134/s106636221101005x

Cited by 46 publications

(35 citation statements)

References 109 publications

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“…The impregnation was most frequently performed by application of an OPC solution in an organic solvent onto a solid support, followed by solvent removal and washing with HNO 3 solution before use [2]. We examined the possibility of Taunit impregnation directly in HNO 3 solution, taking advantage of the capability of many OPCs to form in nitric acid solutions adducts that are capable to efficiently extract actinides and are sufficiently hydrophobic to be immobilized on the solid phase.…”

Section: Impregnation Of Taunit Carbon Nanotubes With Opc Adducts In mentioning

confidence: 99%

“…CMPO-type reagents exhibit the highest affinity for actinides, including trivalent actinides, and REE in extraction and sorption recovery from solutions with a high acid concentration [2,16,23,24]. We evaluated the sorption ability of all the SPEs prepared with all the reagents tested in 3 M НNO 3 .…”

Section: Sorption Recovery Of Actinides With Spes Based On Taunitmentioning

confidence: 99%

“…For example, we showed that SPEs prepared by impregnation of Taunit multiwalled carbon nanotubes with solutions of CMPO, TOPO, and Cyphos IL-101 phosphonium ionic liquid in dichloroethane can be used for radionuclide preconcentration from 3 M HNO 3 solutions [2,14]. Turanov et al [15] showed that multiwalled carbon nanotubes modified with tetraphenylmethylenediphosphine dioxide in 3 M HNO 3 exhibit high ability to sorb lanthanides from nitric acid solutions.…”

mentioning

confidence: 98%

“…The most promising for recovering actinides and fission rare-earth elements from nitric acid solutions are sorption methods with SPEs containing groups of organophosphorus compounds (OPCs): phosphinates, phosphonates, phosphine oxides, alkyl phosphates, etc., capable to form stable complexes with the radionuclides being recovered [2][3][4]. Numerous SPEs with OPC groups are known.…”

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confidence: 99%

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Solid-phase extractants based on taunit carbon nanotubes for actinide and REE preconcentration from nitric acid solutions

et al. 2012

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The sorption properties of solid-phase extractants (SPEs) prepared by impregnation of Taunit carbon nanotubes with adducts of diphenyl(dibutylcarbamoylmethyl)phosphine oxide (CMPO) and tri-n-octylphosphine oxide (TOPO) in HNO 3 solutions were studied. The SPEs exhibit high ability to sorb U(VI), Pu(IV), Np(V), Am(III), and Eu(III) from nitric acid solutions, with good kinetic properties. The impregnation conditions and distribution coefficients of the radionuclides in their recovery from 3 M HNO 3 were determined. The possibility of preparing SPEs by Taunit impregnation in HNO 3 solutions with adducts of tributyl phosphate (TBP) and N,N'-dimethyl-N,N'-dioctylhexylethoxymalonamide (DMDOHEMA) and with Cyphos IL-101 phosphonium ionic liquid was demonstrated.

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Section: Impregnation Of Taunit Carbon Nanotubes With Opc Adducts In mentioning

confidence: 99%

Section: Sorption Recovery Of Actinides With Spes Based On Taunitmentioning

confidence: 99%

mentioning

confidence: 98%

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confidence: 99%

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Solid-phase extractants based on taunit carbon nanotubes for actinide and REE preconcentration from nitric acid solutions

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“…The comparison table given in the review of Zheng et al seems to suggest that there is not much difference in both the techniques in terms of the limit of detection. 19 For the analyses of radioactive elements, single step solid phase extraction would also provide secure physical transportation reducing the possibility of contamination of the instrument, cross-contamination of samples, and minimizing the exposure to radiation by eliminating undesirable radioactivity. 1 However, these methods are cumbersome as elaborate precautions have to be taken during handling of radioactive materials.…”

Section: Introductionmentioning

confidence: 99%

Polymer based sorbent materials for thermal ionization mass spectrometric determination of uranium(vi) and plutonium(iv) ions

Paul

Pandey

Shah

et al. 2016

J. Anal. At. Spectrom.

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Thermal ionization mass spectrometry (TIMS) is a widely used method for obtaining information about the isotopic composition of individual isotopes with high resolution and accurate quantification with considerably low detection limits. However, analyses by TIMS require an elaborate sample preparation step to eliminate the matrix and subsequent manual loading of small volumes of purified aqueous samples on a filament surface for thermal ionization. This is cumbersome, particularly for the handling of radioactive solutions. Therefore, in the present work, polymeric material based sorbents were explored for the single step matrix elimination and source preparation for the loading of U(VI) and Pu(IV) ions preconcentrated from a variety of environmental and nuclear fuel reprocessing samples. The solid phase loading offers a number of advantages for handling radioactive materials, and is amenable to matrix elimination and preconcentration of analytes that would further improve the detection limit of TIMS. The polymer based sorbents were prepared by anchoring neutral and acidic phosphate functional groups selective to actinide ions in porous poly(propylene) and poly(ethersulfone) matrices. One of the procedures used for the preparation of polymeric sorbents involved grafting of the monomers phosphoric acid 2-hydroxyethyl methacrylate ester and 2-ethylhexylmethacrylate (EHM) in 1 : 1 molar proportion by UV-initiator induced polymerization in the pores of the host matrix. In another route, the liquid extractants tris(2-ethylhexyl) phosphate (TEHP) along with bis(2-ethylhexyl) phosphoric acid (HDEHP), in different molar proportions, were physically immobilized by capillary force in the pores of poly(propylene) and poly(ethersulfone) membranes and beads. It was observed that the poly(propylene) pyrolyzed easily at a filament temperature close to that used for solution based sample loading, and thus was best suited for the analyses of U(VI) and Pu(IV) by TIMS. The composition of the polymer membrane supported liquid extractant based sorbents was optimized for the preconcentration of U(VI) from ground water and seawater, and also for the preconcentration of Pu(IV) from 3 mol L À1 HNO 3 , which is normally encountered in nuclear fuel reprocessing facilities. The parameters affecting the analytical performance of polymer sorbent based TIMS were evaluated, and tested for the quantification of U and Pu in the ppb concentration range in seawater and urine samples using the isotope dilution method. Sample Pu(IV) conc. (ppm) PolymSorb-TIMS Solution-TIMS Avg. RSD (%) Avg. RSD (%) Dissolver solution 12.90 AE 0.07 0.51 13.05 AE 0.04 0.30This journal is

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Ionic Liquids for Sustainable Production of Actinides and Lanthanides

Bertón

Kelley

Rogers

2016

Metal Sustainability

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Solid-phase extractants for radionuclide preconcentration and separation. New possibilities

Cited by 46 publications

References 109 publications

Solid-phase extractants based on taunit carbon nanotubes for actinide and REE preconcentration from nitric acid solutions

Solid-phase extractants based on taunit carbon nanotubes for actinide and REE preconcentration from nitric acid solutions

Polymer based sorbent materials for thermal ionization mass spectrometric determination of uranium(vi) and plutonium(iv) ions

Ionic Liquids for Sustainable Production of Actinides and Lanthanides

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