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Effect of cement water contacting an aged cementitious grout on the dissolution rates of inactive nuclear glass SON68.

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Title: Effect of cement water contacting an aged cementitious grout on the dissolution rates of inactive nuclear glass SON68.
Authors: Debure, Mathieu1 (AUTHOR) m.debure@brgm.fr, Grangeon, Sylvain1 (AUTHOR), Martin, Christelle2 (AUTHOR), Michau, Nicolas2 (AUTHOR), Linard, Yannick2 (AUTHOR), Bourbon, Xavier2 (AUTHOR), Ory, Sandra3 (AUTHOR), Maubec, Nicolas1 (AUTHOR), Lerouge, Catherine1 (AUTHOR)
Source: Journal of the American Ceramic Society. Jul2025, Vol. 108 Issue 7, p1-21. 21p.
Subjects: Borosilicates, Deionization of water, Glass waste, Geological repositories, Thermodynamics, Radioactive wastes
Abstract: The long‐term behavior of high‐level radioactive waste glass depends on the mineralogical and geochemical interactions between the various components of the multibarrier system, under geological repository conditions. The present study focuses on SON68 glass alteration in synthetic cement water and at 50°C and 70°C. While pH > 10, the glass dissolution rates were lower when contacting synthetic cement water than deionized water. This effect stems from the high Ca concentration and the presence of Si in the porewater. The initial dissolution rates at low reaction progress (3.4 ± 1.0 × 10−2 g m−2 d−1 at 50°C and 1.9 ± 0.8 × 10−2 g m−2 day−1 at 70°C) and the long‐term dissolution rates at high reaction progress (1.5 ± 0.5 × 10−5 g m−2 day−1 at 50°C and 6.7 ± 1.0 × 10−5 g m−2 day−1 at 70°C), were two times to one order of magnitude lower than the rates determined in deionized water. The cement water has a beneficial effect on glass dissolution rates which were dependent on pH, Si, and Ca concentrations. [ABSTRACT FROM AUTHOR]
Copyright of Journal of the American Ceramic Society is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Effect of cement water contacting an aged cementitious grout on the dissolution rates of inactive nuclear glass SON68.
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  Data: <searchLink fieldCode="AR" term="%22Debure%2C+Mathieu%22">Debure, Mathieu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> m.debure@brgm.fr</i><br /><searchLink fieldCode="AR" term="%22Grangeon%2C+Sylvain%22">Grangeon, Sylvain</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Martin%2C+Christelle%22">Martin, Christelle</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Michau%2C+Nicolas%22">Michau, Nicolas</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Linard%2C+Yannick%22">Linard, Yannick</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bourbon%2C+Xavier%22">Bourbon, Xavier</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ory%2C+Sandra%22">Ory, Sandra</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Maubec%2C+Nicolas%22">Maubec, Nicolas</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lerouge%2C+Catherine%22">Lerouge, Catherine</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+the+American+Ceramic+Society%22">Journal of the American Ceramic Society</searchLink>. Jul2025, Vol. 108 Issue 7, p1-21. 21p.
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  Data: <searchLink fieldCode="DE" term="%22Borosilicates%22">Borosilicates</searchLink><br /><searchLink fieldCode="DE" term="%22Deionization+of+water%22">Deionization of water</searchLink><br /><searchLink fieldCode="DE" term="%22Glass+waste%22">Glass waste</searchLink><br /><searchLink fieldCode="DE" term="%22Geological+repositories%22">Geological repositories</searchLink><br /><searchLink fieldCode="DE" term="%22Thermodynamics%22">Thermodynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Radioactive+wastes%22">Radioactive wastes</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The long‐term behavior of high‐level radioactive waste glass depends on the mineralogical and geochemical interactions between the various components of the multibarrier system, under geological repository conditions. The present study focuses on SON68 glass alteration in synthetic cement water and at 50°C and 70°C. While pH > 10, the glass dissolution rates were lower when contacting synthetic cement water than deionized water. This effect stems from the high Ca concentration and the presence of Si in the porewater. The initial dissolution rates at low reaction progress (3.4 ± 1.0 × 10−2 g m−2 d−1 at 50°C and 1.9 ± 0.8 × 10−2 g m−2 day−1 at 70°C) and the long‐term dissolution rates at high reaction progress (1.5 ± 0.5 × 10−5 g m−2 day−1 at 50°C and 6.7 ± 1.0 × 10−5 g m−2 day−1 at 70°C), were two times to one order of magnitude lower than the rates determined in deionized water. The cement water has a beneficial effect on glass dissolution rates which were dependent on pH, Si, and Ca concentrations. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of the American Ceramic Society is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1111/jace.20500
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        Text: English
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        PageCount: 21
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      – SubjectFull: Borosilicates
        Type: general
      – SubjectFull: Deionization of water
        Type: general
      – SubjectFull: Glass waste
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      – SubjectFull: Geological repositories
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      – SubjectFull: Thermodynamics
        Type: general
      – SubjectFull: Radioactive wastes
        Type: general
    Titles:
      – TitleFull: Effect of cement water contacting an aged cementitious grout on the dissolution rates of inactive nuclear glass SON68.
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            NameFull: Debure, Mathieu
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            – D: 01
              M: 07
              Text: Jul2025
              Type: published
              Y: 2025
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