NMR characterization of simulated Hanford low-activity waste glasses and its use in understanding waste form chemical durability

J. G. Darab; John Linehan; B. P. McGrail

NMR characterization of simulated Hanford low-activity waste glasses and its use in understanding waste form chemical durability

J. G. Darab, John Linehan, B. P. McGrail

Pacific Northwest National Laboratory

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

6 Citations (Scopus)

Abstract

Magic Angle Spinning Nuclear Magnetic Resonance (MAS-NMR) spectroscopy has been used to characterize the structural and chemical environments of B, Al, and Si in model Hanford low-activity waste glasses. The average ²⁹Si NMR peak position was found to systematically change with changing glass composition and structure. From an understanding of the structural roles of Al and B obtained from MAS-NMR experiments, we first developed a model that reliably predicts the distribution of structural units and the average ²⁹Si chemical shift value, δ, based purely on glass composition. A product consistency test (PCT) was used to determine the normalized elemental release (NL) from the prepared glasses. Comparison of the NMR and PCT data obtained from sodium boro-aluminosilicate glasses indicates that a rudimentary exponential relationship exists between the ²⁹Si chemical shift value, and the boron NL value.

Original language	English
Title of host publication	Materials Research Society Symposium - Proceedings
Publisher	Materials Research Society
Pages	337-344
Number of pages	8
Volume	556
Publication status	Published - 1999
Event	Proceedings of the 1998 MRS Fall Meeting - Symposium 'Scientific Basis for Nuclear Waste Management XXII' - Boston, MA, USA Duration: Nov 30 1998 → Dec 4 1998

Other

Other	Proceedings of the 1998 MRS Fall Meeting - Symposium 'Scientific Basis for Nuclear Waste Management XXII'
City	Boston, MA, USA
Period	11/30/98 → 12/4/98

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials

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NMR characterization of simulated Hanford low-activity waste glasses and its use in understanding waste form chemical durability. / Darab, J. G.; Linehan, John; McGrail, B. P.

Materials Research Society Symposium - Proceedings. Vol. 556 Materials Research Society, 1999. p. 337-344.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Darab, JG, Linehan, J & McGrail, BP 1999, NMR characterization of simulated Hanford low-activity waste glasses and its use in understanding waste form chemical durability. in Materials Research Society Symposium - Proceedings. vol. 556, Materials Research Society, pp. 337-344, Proceedings of the 1998 MRS Fall Meeting - Symposium 'Scientific Basis for Nuclear Waste Management XXII', Boston, MA, USA, 11/30/98.

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abstract = "Magic Angle Spinning Nuclear Magnetic Resonance (MAS-NMR) spectroscopy has been used to characterize the structural and chemical environments of B, Al, and Si in model Hanford low-activity waste glasses. The average 29Si NMR peak position was found to systematically change with changing glass composition and structure. From an understanding of the structural roles of Al and B obtained from MAS-NMR experiments, we first developed a model that reliably predicts the distribution of structural units and the average 29Si chemical shift value, δ, based purely on glass composition. A product consistency test (PCT) was used to determine the normalized elemental release (NL) from the prepared glasses. Comparison of the NMR and PCT data obtained from sodium boro-aluminosilicate glasses indicates that a rudimentary exponential relationship exists between the 29Si chemical shift value, and the boron NL value.",

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