A novel approach for extraction of plutonium and americium from aqueous complexing media

Vats, Bal Govind; Pius, I. C.; Noronha, D. M.; Kannan, S.

doi:10.1007/s10967-018-5857-6

Cited by 4 publications

(2 citation statements)

References 22 publications

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“…Novel polymeric substrates have been reported from our laboratory for rapid and selective separation of actinides from complex matrices as well as partitioning of plutonium and uranium in an acidic medium. [19][20][21][22][23][24] The method is based on a supported liquid membrane (DOHA-PP) containing a hydrophobic, liquid extractant N,N ′ -dioctyl-a-hydroxyacetamide (DOHA) in dodecane, that was found to be highly selective towards Pu(IV) in a 3-4 M nitric acid medium, compared to other actinides such as Am(III), Np(V) and U(VI). Using a DOHA-PP membrane, it was possible to measure the 238 Pu/ 239 Pu atom ratio by TIMS i.e.…”

Section: Introductionmentioning

confidence: 99%

Rapid and precise determination of the ²³⁸Pu/²³⁹Pu isotope ratio using thermal ionization mass spectrometry

Goswami,

Paul,

Bhushan

et al. 2024

J. Anal. At. Spectrom.

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Section: Introductionmentioning

confidence: 99%

Rapid and precise determination of the ²³⁸Pu/²³⁹Pu isotope ratio using thermal ionization mass spectrometry

Goswami,

Paul,

Bhushan

et al. 2024

J. Anal. At. Spectrom.

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“…The monoamide DOHA ligand was selected for the present study because it exhibits very high selectivity toward Pu IV compared to other actinides like Am III and U VI . Earlier, Kannan et al have reported distribution coefficients of 10 4 and 10 for Pu IV and U VI , respectively, in ≥3 M nitric acid medium using 0.2 M solution of N , N ′-dioctyl-α-hydroxyacetamide in dodecane. , The choice of the polypropylene membrane as the polymeric support was based on its highly porous structure that renders easy and fast accessibility of binding sites for actinide sorption and also that polypropylene easily decomposes during TIMS analysis. For TIMS analysis, the supported liquid membrane preloaded with Pu was deposited at the center of a Re filament, in a well-defined and reproducible manner that improved the transport of gaseous ions to the mass analyzer, thereby enhancing the sample utilization efficiency.…”

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confidence: 99%

Task-Specific Supported Liquid Membrane for Actinide Assay in Aqueous Streams by Thermal Ionization Mass Spectrometry

2019

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Thermal ionization mass spectrometry is the most commonly used technique for the determination of Pu isotopic composition and concentration in complex matrices but involves multiple steps including sample pretreatment, removal of matrix, preconcentration of Pu, and loading on a rhenium filament for TIMS analysis. The present work reports the synthesis of the N,N′-dioctyl-α-hydroxyacetamide (DOHA) functionalized supported liquid membrane that offered dual functions: (i) matrix elimination and/or preconcentration of actinides from complex aqueous samples and (ii) served as a loading substrate for TIMS analysis. The ligand composition in the membrane can be tuned aiming either for selective preconcentration of Pu from an aqueous matrix or for bulk removal of actinides. The membrane, impregnated with 0.2 M DOHA in dodecane, showed very high selectivity for PuIV in acidic medium, in the presence of other competing actinides, viz., AmIII, UVI, and NpV. The membrane based loading in TIMS improved the sample utilization efficiency and ionization efficiency compared to the conventional solution loading technique, offering Pu analysis from a single Re filament, that served as both vaporization and ionization filament and direct determination of 238Pu in the presence of 238U, eliminating the requirement of alpha spectrometry. It was possible to achieve >80% reduction in analysis time and >95% reduction in secondary waste generation by the SLM-TIMS method, compared to conventional TIMS involving Pu purification by anion exchange resin. Pu concentrations in seawater and groundwater samples, synthetic urine, and dissolver solution of irradiated fuel were determined by SLM-TIMS, employing the isotope dilution (ID) technique, with very good accuracy and precision. The membrane, impregnated with 2 M DOHA in dodecane, showed strong affinity for actinides and was successfully employed for the removal of bulk actinides from aqueous samples with more than 96% recovery.

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Efficient sequestration of plutonium from aqueous medium using nitrogen doped graphene nano walls

Chaitanya,

Manojkumar,

Tripurasundari

et al. 2024

J Radioanal Nucl Chem

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Nitrogen doped graphene nanowall(s) deposited on carbon paper is employed in sequestration of trace-level plutonium from aqueous solution using batch adsorption technique. Surface and structural characteristics of the sorbent are studied using SEM and Raman spectroscopy, respectively. Radiometric α-counting of the supernatant solution showed > 90% sorption at pH > 7. Visual Minteq modelling revealed that Pu(OH)4 species is responsible for high sorption. Freundlich model evolved as the best fit, implying multilayer deposition on a heterogeneous surface as the mechanism of sorption. The combination of 10 M HNO3 and EDTA resulted in 75% desorption. The results are promising for the sequestration of trace-level plutonium.

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A novel approach for extraction of plutonium and americium from aqueous complexing media

Cited by 4 publications

References 22 publications

Rapid and precise determination of the ²³⁸Pu/²³⁹Pu isotope ratio using thermal ionization mass spectrometry

Rapid and precise determination of the ²³⁸Pu/²³⁹Pu isotope ratio using thermal ionization mass spectrometry

Task-Specific Supported Liquid Membrane for Actinide Assay in Aqueous Streams by Thermal Ionization Mass Spectrometry

Efficient sequestration of plutonium from aqueous medium using nitrogen doped graphene nano walls

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A novel approach for extraction of plutonium and americium from aqueous complexing media

Cited by 4 publications

References 22 publications

Rapid and precise determination of the 238Pu/239Pu isotope ratio using thermal ionization mass spectrometry

Rapid and precise determination of the 238Pu/239Pu isotope ratio using thermal ionization mass spectrometry

Task-Specific Supported Liquid Membrane for Actinide Assay in Aqueous Streams by Thermal Ionization Mass Spectrometry

Efficient sequestration of plutonium from aqueous medium using nitrogen doped graphene nano walls

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Product

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Rapid and precise determination of the ²³⁸Pu/²³⁹Pu isotope ratio using thermal ionization mass spectrometry

Rapid and precise determination of the ²³⁸Pu/²³⁹Pu isotope ratio using thermal ionization mass spectrometry