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Journal Articles European Journal of Inorganic Chemistry Year : 2014

Speciation of Technetium in Sulfuric Acid/Hydrogen Sulfide Solutions

M. Ferrier
  • Function : Author
F. Poineau
  • Function : Author
A. P. Sattelberger
  • Function : Author
J. Unger
  • Function : Author
K. R. Czerwinski
  • Function : Author


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.

Dates and versions

in2p3-00993356 , version 1 (20-05-2014)



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, 2014, 2014, pp.2046-2052. ⟨10.1002/ejic.201301410⟩. ⟨in2p3-00993356⟩
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