Uranium speciation in glass corrosion layers: An XAFS study

Conference · Wed Dec 31 00:00:00 EST 1997

OSTI ID:572044

Biwer, B M; Soderholm, L ^[1]; Greegor, R B ^[2]; Lytle, F W ^[3]

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1. Argonne National Lab., IL (United States)
2. Boeing Co., Seattle, WA (United States)
3. EXAFS Co., Pioche, NV (United States)

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 corrosion layer. The uranium concentrations within the corrosion layer also show variations with leaching times that can be determined from the data.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG06-84ER45121
• OSTI ID: 572044
• Report Number(s): CONF-961202-; TRN: 98:003697
• Resource Relation: Conference: 1996 Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 2-6 Dec 1996; Other Information: PBD: 1997; Related Information: Is Part Of Scientific basis for nuclear waste management XX; Gray, W.J. [ed.] [Pacific Northwest National Lab., Richland, WA (United States)]; Triay, I.R. [ed.] [Los Alamos National Lab., NM (United States)]; PB: 1389 p.; Materials Research Society symposium proceedings, Volume 465
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
05 NUCLEAR FUELS
BOROSILICATE GLASS
WASTE FORMS
URANIUM COMPOUNDS
LEACHING
CORROSION PRODUCTS
VALENCE
SURFACE PROPERTIES
PHASE STUDIES