Hydration of soda-lime glass

Lanford, W. A.; Davis, Kenneth A.; LaMarche, P. H.; Laursen, Thomas; Groleau, R.; Doremus, Robert H.

doi:10.1016/0022-3093(79)90053-x

Cited by 289 publications

(159 citation statements)

References 7 publications

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“…Doremus 7) proposed a model that the leaching of the soluble elements from the glass is controlled by diffusion between soluble elements and hydrogen ions. This model is supported by the following study conducted by Lanford et al 8) They measured the elemental depth profiles of sodium and hydrogen in the surface of soda-lime glass leached in the deionized water, and found that the self-diffusion coefficients estimated from depth profiles were consistent with those derived from the tracer diffusion experiment. Furthermore, Inagaki et al 4) conducted the leaching experiment of powdered P0798 glass in deionized water at 363 K for periods of 1.12 × 10 4 ks.…”

Section: -7)supporting

confidence: 55%

“…This model describes the mechanism of elemental release by diffusion between hydrogen ion and alkali ion. Lanford et al 8) estimated a diffusion coefficient of sodium by appling the model by Doremus to elemental depth profile of sodium in leached soda-lime glass, and they found that the value was consistent with the selfdiffusion coefficient derived from the tracer diffusion experiment. Thus the self-diffusion coefficients are closely related to the elemental release from glass contacted with water, and it is indispensable to obtain precise data of self-diffusion coefficients for assessment of release rate of radionuclides.…”

Section: )mentioning

confidence: 84%

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Self-Diffusion of 22Na and 137Cs in Simulated Nuclear Waste Glass

Nonaka

Nakajima

Mitsui³

et al. 2002

Mater. Trans.

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The knowledge of self-diffusion of various elements is important for understanding and elucidating the long-term dissolution of the nuclear waste glass. The self-diffusion coefficients of Na and Cs in P0798 simulated nuclear waste glass have been measured by an ion beam sputter-sectioning technique using the radioactive isotopes 22 Na and 137 Cs. The temperature dependence of the diffusion coefficients in each temperature range in P0798 glass below the glass transition temperature T g can be expressed by the following equations:The diffusion coefficient of 22 Na was about ten orders of magnitude larger than that of 137 Cs at 573 K. The large difference in the diffusion coefficients is explained in terms of the ion size effect, the mixed-alkali effect and lower concentration of Cs compared with Na in P0798 glass.

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Section: -7)supporting

confidence: 55%

Section: )mentioning

confidence: 84%

Self-Diffusion of 22Na and 137Cs in Simulated Nuclear Waste Glass

Nonaka

Nakajima

Mitsui³

et al. 2002

Mater. Trans.

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“…5 have be'-n measured [35,36]. This discrepancy between the expected and measured exchange ratios may be due in part to dehydration of the sariple in the vacuum chamber, which would lead to lower measured amounts of hydrogen in the altered glass layers and thus lower exchange ratios [37]. The effects of dehydration should be greatest at the outer surface of the layer and become less significant deeper into the layer.…”

Section: Nmdm + Nhdhmentioning

confidence: 95%

The effects of the glass surface area/solution volume ratio on glass corrosion: A critical review

Ebert

1995

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Argonne National Lahoratory. wi1th facilitie, in the states of liiinois and Idaho. is owned by the united States govern lent, and operated by The Un diversity of Chicago under the provisions of a contract with thie department of Enery. DISCLAIM ER THE FFFECTS OF THE GLASS SURFACE AREA/SOLUTION VOLUME RATIO ON GLASS CORROSION: A CRITICAL REVIEW William L. Ebert ABSTRACTThis report reviews and summarizes the present state of knowledge regarding the effects of the glass surface area/solution volume (SA/V) ratio on the corrosion behavior of borosilicate waste glasses. The SA/V ratio affects the rate of glass corrosion through the extent of dilution ok corrosion products released from the glass into the leachate solution: glass corrosion products are diluted more in tests conducted at low SA/V ratios than they are in tests conducted at high SAN ratios. Differences in the solution chemistries generated in tests conducted at different SA/V ratios then affect the observed glass corrosion behavior. Corrosion of borosilicate waste glasses results in the dissolution of soluble components and the accumulation of sparingly soluble components in a layer on the surface of the corroding glass. Laboratory tests performed to distinguish the effects of the solution chemistry and the surface layer on the glass corrosion rate have shown the rate to be controlled primarily by the solution chemistry. Therefore, any testing parameter that affects the solution chemistry will also affect the glass corrosion rate. The results of static leach tests conducted to assess the effects of the SAN are discussed with regard to the effects of SAN on the solution chemistry. The effects of the SA/V ratio observed in static tests can be understood based on the effects of the solution chemistry on glass corrosion behavior. Test results show several remaining issues with regard to the long-term glass corrosion behavior: Can the SAN ratio be used as an accelerating parameter to characterize the advanced stages of glass corrosion relevant to long disposal times? Is the alteration of the glass surface the same in tests conducted at different SAN, and in tests conducted with monolithic and crushed glass samples? What are the effects of the SAN and the extent of glass corrosion on the disposition of released radionuclides? These issues will bear on the prediction of the long-term performance of waste glasses during storage. The results of an experimental program conducted at ANL to address these and other remaining issues regarding the effects of SA/V on glass corrosion are described. I 2 SUMMARYThis report reviews and summarizes the present state of knowledge regarding the effects of the glass surface area/solution volume ratio (SA/V) on the corrosion behavior of borosilicate waste glasses. The effects of the SA/ occur through dilution of corrosion products and through the effects of the corrosion products on the glass corrosion mechanism and rate. Therefore, the effects of the SA/V on glass corrosion are discussed in terms of the various effects of t...

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“…In contrast, if the binary interdiffusion coefficient D, is compositionally dependent, and is functionally related to composition and trace diffusion coefficients according to (Lanford et al, 1979):…”

Section: -1omentioning

confidence: 99%

Volume II: near-field and altered-zone environment report

Wilder¹

1996

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Hydration of soda-lime glass

Cited by 289 publications

References 7 publications

Self-Diffusion of <SUP>22</SUP>Na and <SUP>137</SUP>Cs in Simulated Nuclear Waste Glass

Self-Diffusion of <SUP>22</SUP>Na and <SUP>137</SUP>Cs in Simulated Nuclear Waste Glass

The effects of the glass surface area/solution volume ratio on glass corrosion: A critical review

Volume II: near-field and altered-zone environment report

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