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Items for "Technetium"

Photochemical behaviour of Tc2OCl104– and TcnOy4n–2y+ in chloride media

The stabilities of the technetium polymers Tc2OCl104- and TcnOy4n-2y+ have been studied under light irradiation in 3 M chloride media with a pH range from 0 to 1.3...

Keywords: Technetium, Polymer, Photochemistry, Speciation

02/2006 | Radiochimica Acta, Oldenbourg Wissenschaftsverlag
Condensation mechanisms of tetravalent technetium in chloride media

The condensation mechanisms of tetravalent technetium in chloride media were
studied in the pH range 0–1.5...

Keywords: Technetium, Condensation, Polymer, Speciation, Solubility

05/2006 | Radiochimica Acta, Oldenbourg Wissenschaftsverlag
Speciation of technetium and rhenium complexes by in situ XAS-electrochemistry

A spectro-electrochemical cell was developed in order to study the speciation of radio-elements in thermodynamic unstable redox states using in situ XAS spectroscopy...

Keywords: Technetium, Rhenium, EXAFS, Speciation, Spectro-electrochemistry

05/2006 | Radiochimica Acta, Oldenbourg Wissenschaftsverlag
Sorption characteristics of 99Tc onto bentonite material with different additives under anaerobic conditions

The radionuclide 99Tc is one of the fission products of spent nuclear fuel. The chemical forms of this element depend primarily on the pH and Eh of the environment...

Keywords: Sorption, Technetium, Bentonite, Glove box conditions, Deep repository

08/2006 | Radiochimica Acta, Oldenbourg Wissenschaftsverlag
Correlation between X-ray chemical shift and partial charge in Tc(IV) complexes: Determination of Tc partial charge in TcnOy(4n-2y)+

The chemical shift of the X-ray absorption K-edge of Tc(IV) complexes determined by X-ray Absorption Spectroscopy (XAS) measurement was studied...

Keywords: Technetium, XAS, Polymer, Partial charge

09/2006 | Radiochimica Acta, Oldenbourg Wissenschaftsverlag
Technetium sorption by stibnite from natural water

The sorption of technetium by powdered and polished mineral stibnite Sb2S3 has been investigated in simulated and natural underground waters from the Meuse/Haute–Marne region (France)...

Keywords: Technetium, Stibnite, Natural water, Sorption

09/2006 | Radiochimica Acta, Oldenbourg Wissenschaftsverlag
Rhenium migration at the Maqarin natural analogue site (Jordan)

Rock analysis and study of groundwater data was combined with a short duration column experiment in order to better understand the behavior of rhenium (Re) in the site of Maqarin (Jordan)...

Keywords: Rhenium, Maqarin, Natural analogue, Migration, Technetium

09/2006 | Radiochimica Acta, Oldenbourg Wissenschaftsverlag
The solubility of technetium(IV) at high pH

Technetium-99 is a β-emitting fission product of 238U. It is important when considering a safety case for nuclear waste disposal because of its high yield in radioactive waste and long half-life...

Keywords: Technetium, Reduction, Solubility, High pH

12/2007 | Radiochimica Acta, Oldenbourg Wissenschaftsverlag