The effect of devitrification on the analysis of environmental glass by XRF spectrometry
- Clemson Univ., SC (United States)
- Westinghouse Savannah River Company, Aiken, SC (United States)
Many environmental {open_quotes}glasses{close_quotes} containing hazardous and/or radioactive wastes are not completely amorphous but rather contain varying degrees of crystallinity. Rapid elemental analysis of these glasses is very important for vitrification process control. However, XRF intensities can be affected by the presence of crystalline phases in the glass. This study examines this effect and quantifies the extent to which the accuracy of the analysis is affected. Low-level mixed waste environmental glasses were made and quenched at two different rates so that one product was amorphous and the other was devitrified. The nature of crystallinity in the devitrified glass was determined by powder x-ray diffraction. The glasses were analyzed by sequential wavelength dispersive x-ray fluorescence spectrometry using standardless fundamental parameters calculations. Elements with atomic numbers as low as boron were determined and compared. The results indicate that devitrification does affect the XRF measurement for some glass compositions, but not others. Factors include the type and size of the crystals present and the tent of devitrification. The results of this study provide some guidance as to what types of environmental glasses can be accurately analyzed by XRF spectrometry, even if devitrification has occurred.
- OSTI ID:
- 210225
- Report Number(s):
- CONF-9509139-; TRN: 95:008324-0065
- Resource Relation:
- Conference: 7. ACS special symposium: emerging technologies in hazardous waste management, Atlanta, GA (United States), 17-20 Sep 1995; Other Information: PBD: 1995; Related Information: Is Part Of Emerging technologies in hazardous waste management VII; Tedder, D.W. [ed.]; PB: 1352 p.
- Country of Publication:
- United States
- Language:
- English
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