Actinide speciation in glass leach-layers: An EXAFS study

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Uranium L{sub 3} X-ray absorption data were obtained from two borosilicate glasses, which are considered as models for radioactive wasteforms, both before and after leaching. Surface sensitivity to uranium speciation was attained by a novel application of simultaneous fluorescence and electron-yield detection. Changes in speciation are clearly discernible, from U(VI) in the bulk to (UO{sub 2}){sup 2+}-uranyl in the leach layer. The leach-layer uranium concentration variations with leaching times are also determined from the data.

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9 p.

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Biwer, B. M.; Soderholm, L.; Greegor, R. B. & Lytle, F. W. December 1996.

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Description

Uranium L{sub 3} X-ray absorption data were obtained from two borosilicate glasses, which are considered as models for radioactive wasteforms, both before and after leaching. Surface sensitivity to uranium speciation was attained by a novel application of simultaneous fluorescence and electron-yield detection. Changes in speciation are clearly discernible, from U(VI) in the bulk to (UO{sub 2}){sup 2+}-uranyl in the leach layer. The leach-layer uranium concentration variations with leaching times are also determined from the data.

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9 p.

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INIS; OSTI as DE97003769

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  • 1996 Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 2-6 Dec 1996

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  • Other: DE97003769
  • Report No.: ANL/CHM/CP--90465
  • Report No.: CONF-961202--93
  • Grant Number: FG06-84ER45121;W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 459339
  • Archival Resource Key: ark:/67531/metadc677737

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  • December 1996

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  • July 25, 2015, 2:21 a.m.

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  • Dec. 14, 2015, 6:31 p.m.

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Biwer, B. M.; Soderholm, L.; Greegor, R. B. & Lytle, F. W. Actinide speciation in glass leach-layers: An EXAFS study, article, December 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc677737/: accessed September 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.