Abstract:
Liquid–liquid extraction of neptunium from aqueous acidic solution using quaternary ammonium based task specific ionic liquid (TSIL) was investigated. The extraction of Np was predominated by the ‘cation exchange’ mechanism via [NpO2·Hpth]+ species for NpO22+, while NpO2+ was extracted in ionic liquid as [NpO2·H·Hpth]+. The extraction process was thermodynamically spontaneous while kinetically slower. Na2CO3 as strippant showed quantitative back extraction of neptunium ions from TSIL. TSIL showed excellent radiolytic stability upto 500 kGy gamma exposure. Finally, the TSIL was employed for the processing of simulated high level waste solutions revealing high selectivity of TSIL towards neptunium.
Acknowledgments
The authors wish to acknowledge Dr. P.K. Pujari, Head’ Radiochemistry Division, and Dr. R.M. Kadam, Head, Actinides Spectroscopy Section, radiochemistry Division for their constant support.
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Supplemental Material:
The online version of this article offers supplementary material (DOI: https://doi.org/10.1515/ract-2016-2694).
©2017 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
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- Understanding the sorption behavior of Pu4+ on poly(amidoamine) dendrimer functionalized carbon nanotube: sorption equilibrium, mechanism, kinetics, radiolytic stability, and back-extraction studies
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Articles in the same Issue
- Frontmatter
- Understanding the sorption behavior of Pu4+ on poly(amidoamine) dendrimer functionalized carbon nanotube: sorption equilibrium, mechanism, kinetics, radiolytic stability, and back-extraction studies
- Quaternary ammonium based task specific ionic liquid for the efficient and selective extraction of neptunium
- Synthesis and evaluation of N,N-di-alkyl-2-methoxyacetamides for the separation of U(VI) and Pu(IV) from nitric acid medium
- Synthesis, radiolabeling and biological evaluation of [125I]-1-[2-(benzylthio)ethyl]-4-(5-iodo-2-methoxyphenyl)piperazine as a new 5-HT1A receptor ligand
- Radiosynthesis and preclinical evaluation of [18F] 4-(2-fluoroethoxy)-2H-chromen-2-one as a novel myocardial perfusion imaging agent
- Radiocomplexation and bioevaluation of 99mTc nitrido-piracetam as a model for brain imaging
- Batch and column adsorption behaviors of Se(IV) and Te(IV) on organic and inorganic ion exchangers from HCl solutions
- Separation of 195(m,g),197mHg from bulk gold target by liquid-liquid extraction using hydrophobic ionic liquids
- Assessment of gamma radiation levels and natural radioactivity in soils along a subtropical river basin, China
- Natural radioactivity-based radiological hazards in soils of the islands: a case study from Eastern Turkey
- Book Review
- Nuclear and Radiochemistry: Fundamentals and Applications