A method for the simultaneous estimation of228Th and229Th

Rattan, Shiv; Reddy, Α. V. R.; Mallapurkar, Vanita S.; Singh, Rahul; Prakash, Satya

doi:10.1007/bf02516233

Cited by 56 publications

(19 citation statements)

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“…233 U tracer was purified from 228 Th and it's decay products by anion exchange which was confirmed by α spectrometry [13]. 234 Th was freshly milked from 238 U loaded on Aliquat 336/CHCl 3 and was purified as per the reported method [14].…”

Section: Radionuclides and Distribution Methodsmentioning

confidence: 99%

Effect of structure of N,N dialkyl amides on the extraction of U(VI) and Th(IV): a thermodynamic study

Pathak¹,

Kumbhare²,

Manchanda³

2001

Radiochimica Acta

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Uranium(VI) / Thorium(IV) / Amide / Extraction / ThermodynamicsSummary. The temperature effect on the extraction behaviour of U(VI) and Th(IV) from 3 M HNO 3 employing 1 M solutions of N,N diallkyl amides with varying alkyl substituents on the C α atom viz. di(2-ethylhexyl)acetamide (D2EHAA), di(2-ethylhexyl)propionamide (D2EHPRA), di(2-ethylhexyl)-isobutyramide (D2EHIBA) and di(2-ethylhexyl)pivalamide (D2EHPVA) in n-dodecane has been investigated. These studies indicate that the extraction reactions of U(VI) and Th(IV) are enthalpy stabilised while the entropy factor counteracts the extraction. An attempt has been made to correlate the thermodynamic parameters with the structure of the extractant molecules.

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Section: Radionuclides and Distribution Methodsmentioning

confidence: 99%

Effect of structure of N,N dialkyl amides on the extraction of U(VI) and Th(IV): a thermodynamic study

Pathak¹,

Kumbhare²,

Manchanda³

2001

Radiochimica Acta

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“…21 233 U was purified from its decay products following an anion exchange method reported in the literature. 22 Pu was purified from impurities such as 241 Am following a reported method on TTA extraction. 23 All the radionuclides were used after checking their radiochemical purities.…”

Section: Experimental Generalmentioning

confidence: 99%

Benzene-centered tripodal diglycolamides: synthesis, metal ion extraction, luminescence spectroscopy, and DFT studies

et al. 2017

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Three benzene-centered tripodal diglycolamides (Bz-T-DGAs) were synthesized and evaluated for actinide, lanthanide, and fission product ion extraction. 1,3,5-Triethylbenzene-based tripodal DGA (LI) showed high distribution ratio (D) values for Am and Eu in a mixture of 95% n-dodecane and 5% iso-decanol at 3 M HNO. Eu/Am separation factors, in the range of 8-10, were obtained at 1 M HNO which decreased at higher acidities with the exception of LII which did not show much change. Benzene-1,3,5-triamide-based tripodal DGA (LII) exhibited a high D-value for Pu compared to the other ligands. Slope analysis showed the formation of 1 : 1 or 1 : 2 complexes is dependent on the ligand. The nature of the complexes was further studied with luminescence spectroscopy (Eu complexes) and DFT calculations (Am complexes).

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“…26-28 152,154 Eu, 85,89 Sr and 137 Cs were obtained from BRIT (Board of Radiation and Isotope Technology, Mumbai) and were used after checking their radiochemical purity by gamma ray spectrometry using an HPGe detector. 28 The valency of Pu was adjusted to the +4 state by using NaNO 2 and ammonium metavanadate as the holding oxidant. 26 241 Am was assayed by a NaI(Tl) scintillation detector using 60 KeV gamma ray.…”

Section: Radiotracersmentioning

confidence: 99%

Unique selectivity reversal in Am³⁺–Eu³⁺ extraction in a tripodal TREN-based diglycolamide in ionic liquid: extraction, luminescence, complexation and structural studies

et al. 2016

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An N-pivot diglycolamide extractant (DGA-TREN) was synthesized for the first time and its complexation behaviour was studied towards trivalent lanthanide/actinide ions. The solvent extraction studies suggested a unique selectivity reversal in the extraction of trivalent actinides versus trivalent lanthanides which was observed performing extraction studies in an ionic liquid vis-à-vis a molecular diluent for a tripodal TREN-based diglycolamide ligand (DGA-TREN) vs. a tripodal diglycolamide ligand (T-DGA) which may have great significance in radioactive waste remediation. The nature of the bonding to Eu(3+) ion was investigated by EXAFS as well as by DFT calculations.

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A method for the simultaneous estimation of228Th and229Th

Cited by 56 publications

References 1 publication

Effect of structure of N,N dialkyl amides on the extraction of U(VI) and Th(IV): a thermodynamic study

Effect of structure of N,N dialkyl amides on the extraction of U(VI) and Th(IV): a thermodynamic study

Benzene-centered tripodal diglycolamides: synthesis, metal ion extraction, luminescence spectroscopy, and DFT studies

Unique selectivity reversal in Am³⁺–Eu³⁺ extraction in a tripodal TREN-based diglycolamide in ionic liquid: extraction, luminescence, complexation and structural studies

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A method for the simultaneous estimation of228Th and229Th

Cited by 56 publications

References 1 publication

Effect of structure of N,N dialkyl amides on the extraction of U(VI) and Th(IV): a thermodynamic study

Effect of structure of N,N dialkyl amides on the extraction of U(VI) and Th(IV): a thermodynamic study

Benzene-centered tripodal diglycolamides: synthesis, metal ion extraction, luminescence spectroscopy, and DFT studies

Unique selectivity reversal in Am3+–Eu3+ extraction in a tripodal TREN-based diglycolamide in ionic liquid: extraction, luminescence, complexation and structural studies

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Unique selectivity reversal in Am³⁺–Eu³⁺ extraction in a tripodal TREN-based diglycolamide in ionic liquid: extraction, luminescence, complexation and structural studies