Plutonium volatility in ozonization of alkaline solutions of Pu(VI) hydroxo complexes

Nikonov, M. V.; Kiselev, Yu. M.; Тананаев, И. Г.; Myasoedov, Β. F.

doi:10.1134/s0012500811030104

Cited by 19 publications

(26 citation statements)

References 7 publications

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“…Initial ≈1 × 10 -3 M 239 Pu(VI) solutions in 4 M NaOH containing ≈10 -6 mol/L 241 Am and 10 -4 -10 -3 mol/L 243 Am and up to ≈10 -6 mol/L 244 Cm, both in a mixture with plu tonium and separately, were ozonated in a thermo stated bubbler at 80°C. Under these experimental con ditions, Pu and Am mass transfer is maximal [1][2][3].…”

Section: Methodsmentioning

confidence: 87%

“…Therefore, we remind only the most general experimental details. The volatility of Pu and Am compounds from aqueous alkaline solutions was studied as in [1][2][3]. Initial ≈1 × 10 -3 M 239 Pu(VI) solutions in 4 M NaOH containing ≈10 -6 mol/L 241 Am and 10 -4 -10 -3 mol/L 243 Am and up to ≈10 -6 mol/L 244 Cm, both in a mixture with plu tonium and separately, were ozonated in a thermo stated bubbler at 80°C.…”

Section: Methodsmentioning

confidence: 99%

“…Previously [1], we have demonstrated that the ozo nation of alkaline solutions of Pu(VI) hydroxo com plexes in combination with heating to 60-85°С is accompanied by volatilization of a plutonium com pound. On the basis of some indirect evidence, it has been suggested that the volatile compound is pluto nium tetroxide Pu VIII O 4 .…”

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confidence: 99%

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Plutonium and americium volatility from ozonated alkaline solutions: The oscillatory character of the processes

2014

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Section: Methodsmentioning

confidence: 87%

Section: Methodsmentioning

confidence: 99%

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Plutonium and americium volatility from ozonated alkaline solutions: The oscillatory character of the processes

2014

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“…The attempts to identify the chemical form of volatile product of oxidation of Pu in aqueous alkaline solutions were not undertaken in the present investigation [17] as the high value of redox potential for Pu(VIII)/Pu(VII) pair does not allow to avoid product change at relatively high temperatures in the presence of water vapor. The investigation included three series of experiments.…”

Section: Volatility Of Pu Derivative Out Of Ozonized Alkaline Solutiomentioning

confidence: 96%

“…The volatility of plutonium compounds out of the ozonized alkaline solutions, observed in [17] is the precondition to implement such an investigation.…”

Section: Introductionmentioning

confidence: 99%

On existence and properties of plutonium(VIII) derivatives

et al. 2014

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The existence of Pu(VIII) was shown in alkaline solutions and in nonpolar solvents (CCl 4 and CHCl 3 ) on the ground of such experimental facts like extraction of plutonium species, obtained by means of ozonization of Pu(VI) alkaline solutions into CCl 4 and CHCl 3 ; volatility of Pu compounds out of aqueous alkaline solutions, and the mentioned solvents. The product of interaction between PuO 3 ⋅ 0.8H 2 O and XeF 2 in CCl 4 and CHCl 3 was of the same chemical form for both cases and identical with the form of the product of volatility of Pu out of these organic solutions. The electronic absorbance spectra of these products in CCl 4 and CHCl 3 were fairly similar to the ones for OsO 4 and RuO 4 . The band of absorption in these spectra with the maximum at 332 nm corresponds to the charge transfer of metal-ligand type [ (O)→Pu], as the value of molar extinction coefficient was found to be higher than 2 × 10 3 L/mole cm. A satisfactory agreement between the energies for the transitions of PuO 4 molecule designed by X -SW method and experimental data was observed. A similar accordance was observed for the designed vibration frequency (DFT-method) with the one found as result of analysis of the vibration structure of the experimental spectra.Keywords: Plutonium, Tetraoxide of plutonium, Electron absorption spectra of tetraoxide of plutonium, Volatility of tetraoxide of plutonium, Quantum chemical simulation of the structure of tetraoxide of plutonium.

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Generalized relativistic effective core potentials for actinides

Mosyagin

Zaitsevskii

Skripnikov

et al. 2015

Int J of Quantum Chemistry

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Actinide compounds are very intriguing objects for the quantum chemistry because, on the one hand, these compounds are of great scientific and technological interest and, on the other hand, quantitative first principle based modeling of their electronic structure is extremely difficult because of strong relativistic effects and complicated electron correlation pattern. The efficiency of high-level all-electron relativistic methods in applications to complex actinide systems of practical interest is questionable and more economical but sufficiently accurate approaches to the studies of such systems are preferable. Recently, generalized relativistic effective core potentials (GRECPs) have been generated for actinides to perform accurate calculations of electronic structure and properties of their compounds with moderate computational cost. The accuracy of different GRECP versions is analyzed in atomic calculations and their applications to molecular and cluster calculations are reviewed. The results are compared with available experimental data and other theoretical studies.

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Plutonium volatility in ozonization of alkaline solutions of Pu(VI) hydroxo complexes

Cited by 19 publications

References 7 publications

Plutonium and americium volatility from ozonated alkaline solutions: The oscillatory character of the processes

Plutonium and americium volatility from ozonated alkaline solutions: The oscillatory character of the processes

On existence and properties of plutonium(VIII) derivatives

Generalized relativistic effective core potentials for actinides

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