Effect of irradiation on some actinide and fission product ions' extraction using several tetraalkyl diglycolamides
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Rajesh Bhikaji Gujar
Abstract
The radiolytic stability of different substituted diglycolamides such as N,N,N′,N′-tetrapentyl diglycolamides(TPDGA), N,N,N′,N′-tetrahexyl diglycolamide (THDGA), N,N,N′,N′-tetraoctyl diglycolamide (TODGA), N,N,N′,N′-tetradecyl diglycolamide (TDDGA) and N,N,N′,N′-tetra-2-ethyl hexyl diglycolamide (T2EHDGA) was investigated in solvent systems containing 30% iso-decanol as a phase modifier in n-dodecane kept in contact with a 3 M HNO3 aqueous solution while irradiating in a gamma ray chamber up to 1000 kGy. The degradation of the solvent systems was qualitatively ascertained from measuring the distribution ratio values at 3 M and 0.2 M HNO3 which gave a direct indication of the reusability of the solvent for long term reuse in separation processes such as `actinide partitioning'. The effect of irradiation on distribution values of Sr, Pu, U was also investigated with diglycolamide extractants both under extraction and stripping conditions. Stoichiometry of the extracted species was determined for Am(III) extraction using the fresh as well as the irradiated solvent systems involving all the five substituted diglycolamides at 3 M HNO3 and the results indicated only marginal changes. GC-MS analysis was done for fresh and irradiated solvent systems of all the diglycolamides and attempts were made to identify the degradation products.
Supplementary material
the online version of this article (DOI: 10.1515/ract-2014-2292) provides supplementary material for authorized users.
Acknowledgement
The authors (RBG and PKM) thank Dr. A. Goswami, Head, Radiochemistry Division, BARC for his keen interest in this work.
©2014 Walter de Gruyter Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Integral cross section measurements of a few threshold reactions induced by Am/Be neutrons
- Effect of irradiation on some actinide and fission product ions' extraction using several tetraalkyl diglycolamides
- Extraction studies of actinides and lanthanides by bifunctional H-phosphonates
- Demonstration of trivalent actinide partitioning from simulated high-level liquid waste using modifier-free unsymmetrical diglycolamide in n-dodecane
- Preparation, characterization and thermodynamic properties of Zr-containing Cl-bearing layered double hydroxides (LDHs)
- Box-Behnken design in modeling of solid-phase tea waste extraction for the removal of uranium from water samples
- Sequestering of thorium ions from aqueous media on rice husk: Equilibrium, kinetic and thermodynamic studies
- Rapid Communication
- Production of no-carrier-added radiobromine: new nickel selenide target and optimized separation by dry distillation
Artikel in diesem Heft
- Frontmatter
- Integral cross section measurements of a few threshold reactions induced by Am/Be neutrons
- Effect of irradiation on some actinide and fission product ions' extraction using several tetraalkyl diglycolamides
- Extraction studies of actinides and lanthanides by bifunctional H-phosphonates
- Demonstration of trivalent actinide partitioning from simulated high-level liquid waste using modifier-free unsymmetrical diglycolamide in n-dodecane
- Preparation, characterization and thermodynamic properties of Zr-containing Cl-bearing layered double hydroxides (LDHs)
- Box-Behnken design in modeling of solid-phase tea waste extraction for the removal of uranium from water samples
- Sequestering of thorium ions from aqueous media on rice husk: Equilibrium, kinetic and thermodynamic studies
- Rapid Communication
- Production of no-carrier-added radiobromine: new nickel selenide target and optimized separation by dry distillation
