Skip to Main content Skip to Navigation
Journal articles

Speciation of Technetium in Sulfuric Acid/Hydrogen Sulfide Solutions

Abstract : The reaction between TcVII and H2S(g) in 12 M H2SO4 has been studied. This reaction produced a black solid and a brown supernate. The solid was analyzed by energy dispersive X-ray (EDX) and X-ray absorption fine structure (XAFS) spectroscopy and the results were consistent with the presence of Tc2S7. The speciation of technetium in the supernate was performed by UV/Visible and XAFS spectroscopy. Experiments showed that in 12 M H2SO4 an intermediate TcV sulfate complex was formed. Analysis indicated that the final complex present in solution was a polymeric species with a Tc-O-Tc core coordinated to sulfate ligands. Density Functional Theory (DFT) calculations showed that the proposed complexes were stable and that the theoretical structure was in good agreement with XAFS data.
Document type :
Journal articles
Complete list of metadata
Contributor : Sophie Heurteau Connect in order to contact the contributor
Submitted on : Tuesday, May 20, 2014 - 10:47:34 AM
Last modification on : Wednesday, September 16, 2020 - 4:08:32 PM

Links full text




M. Ferrier, J. Roques, F. Poineau, A. P. Sattelberger, J. Unger, et al.. Speciation of Technetium in Sulfuric Acid/Hydrogen Sulfide Solutions. European Journal of Inorganic Chemistry, Wiley-VCH Verlag, 2014, 2014, pp.2046-2052. ⟨10.1002/ejic.201301410⟩. ⟨in2p3-00993356⟩



Record views