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Resonant Inelastic Soft X-ray Scattering Studies of U(VI) Reduction on Iron Surfaces

Published online by Cambridge University Press:  01 February 2011

S. M. Butorin ,
D. K. Shuh ,
K. Kvashnina ,
I. L. Soroka ,
K. Ollila ,
K. E. Roberts ,
J.-H. Guo ,
L. Werme  and
J. Nordgren
S. M. Butorin
Affiliation:
Department of Physics, Uppsala University, Box 530, S-751 21 Uppsala, Sweden
D. K. Shuh
Affiliation:
Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
K. Kvashnina
Affiliation:
Department of Physics, Uppsala University, Box 530, S-751 21 Uppsala, Sweden
I. L. Soroka
Affiliation:
Department of Physics, Uppsala University, Box 530, S-751 21 Uppsala, Sweden
K. Ollila
Affiliation:
VTT Chemical Technology, P. O. Box 1404, FIN-02044 VTT, Finland
K. E. Roberts
Affiliation:
Analytical & Nuclear Chemistry Division, Lawrence Livermore National Laboratory, P. O.Box 808, Livermore, California 94550, USA
J.-H. Guo
Affiliation:
Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
L. Werme
Affiliation:
SKB, Box 5864, S-102 40 Stockholm, Sweden
J. Nordgren
Affiliation:
Department of Physics, Uppsala University, Box 530, S-751 21 Uppsala, Sweden
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Abstract

We report on the spectroscopic analysis of several samples relevant to the processes governing the behavior of oxidized uranium species in groundwater solutions under anoxic conditions. Both Fe samples with different times of exposure to the U(IV) solution and Fe metal-solution inetrfaces in the liquid cell ex-situ and in-situ, respectively. Resonant inelastic soft x-ray scattering is shown to be sensitive to the chemical state of uranium. The measurements were performed at a number of energies of the primary photon beam across the U 5d absorption edge. The results unambiguously indicate the reduction of U(VI) to U(IV) on the Fe surface.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 807: Symposium Scientific Basis for Nuclear Waste Management XXVII , 2003 , 113
Copyright
Copyright © Materials Research Society 2004

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References

REFERENCES

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