Technetium sulfide – formation kinetics, structure and particle speciation
-
Konstantin E. German
,
Andrey A. Shiryaev
Abstract
Technetium sulfide formation kinetics was studied in the pH range 8 − 12 in presence of Na2S and phosphate buffer solution. The conditions for separation of Tc sulfide micro and nanoparticles were found with ultramicrocentifugation and the values of Tc sulfide solubility were demonstrated to be dependent on the Na2S concentration as C(Tc3S10+x) =− 9E − 5 ln [Na2S] − 2 · 10–5 M. The composition of Tc sulfide precipitate was elucidated with EXAFS, RBS and chemical analyses as Tc3S10+x or [Tc3(μ3 − S)(S2)3(S2)3/3]n in agreement with recent Lukens data.
Acknowledgement
The work was carried out in part as the statutory work of the A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences within the grant RFBR 14-03-00067. One of us (KEG) is grateful to the staff of CENBG Radioanalytical and Environmental Chemistry Lab (Bordeaux-Gradignan) and of Pierre Sue Laboratory, CE de Saclay, for the possibility of carrying out the analyses of Tc sulfide by RBS.
©2015 Walter de Gruyter Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Preface
- Radiochemistry in Northern Europe
- Fuel fabrication and reprocessing for nuclear fuel cycle with inherent safety demands
- Partitioning and speciation of Pu in the sedimentary rocks aquifer from the deep liquid nuclear waste disposal
- Sequential extraction as a tool for mobility studies of radionuclides and metals in soils and sediments
- Technetium sulfide – formation kinetics, structure and particle speciation
- Sorption of actinides onto nanodiamonds
- Sorption processes of radiocesium in soil and bedrock
- Post-target produced [18F]F2 in the production of PET radiopharmaceuticals
- Towards automated solid phase radiofluorination for dose-on-demand PET: retention of activity by solid support
Artikel in diesem Heft
- Frontmatter
- Preface
- Radiochemistry in Northern Europe
- Fuel fabrication and reprocessing for nuclear fuel cycle with inherent safety demands
- Partitioning and speciation of Pu in the sedimentary rocks aquifer from the deep liquid nuclear waste disposal
- Sequential extraction as a tool for mobility studies of radionuclides and metals in soils and sediments
- Technetium sulfide – formation kinetics, structure and particle speciation
- Sorption of actinides onto nanodiamonds
- Sorption processes of radiocesium in soil and bedrock
- Post-target produced [18F]F2 in the production of PET radiopharmaceuticals
- Towards automated solid phase radiofluorination for dose-on-demand PET: retention of activity by solid support
