Obtaining solubility constants to describe the incongruent dissolution of SON68 waste glass by an equilibrium ideal solid solution model approach

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Obtaining solubility constants to describe the incongruent dissolution of SON68 waste glass by an equilibrium ideal solid solution model approach. / Jacques, Diederik; Lemmens, Karel.

Symposium Proceedings. Scientific Basis for Nuclear Waste Management XXIX. Warrendale, United States, 2006. p. 337-344.

Research output: Contribution to report/book/conference proceedingsIn-proceedings paperpeer-review

Harvard

Jacques, D & Lemmens, K 2006, Obtaining solubility constants to describe the incongruent dissolution of SON68 waste glass by an equilibrium ideal solid solution model approach. in Symposium Proceedings. Scientific Basis for Nuclear Waste Management XXIX. Warrendale, United States, pp. 337-344, MRS 2005. 29th International Symposium on the Scientific Basis for Nuclear Waste Management, Gent, Belgium, 2005-09-12.

Vancouver

Jacques D, Lemmens K. Obtaining solubility constants to describe the incongruent dissolution of SON68 waste glass by an equilibrium ideal solid solution model approach. In Symposium Proceedings. Scientific Basis for Nuclear Waste Management XXIX. Warrendale, United States. 2006. p. 337-344

Author

Jacques, Diederik ; Lemmens, Karel. / Obtaining solubility constants to describe the incongruent dissolution of SON68 waste glass by an equilibrium ideal solid solution model approach. Symposium Proceedings. Scientific Basis for Nuclear Waste Management XXIX. Warrendale, United States, 2006. pp. 337-344

Bibtex - Download

@inproceedings{11363a125e834adb85fb7b0fa095cbbf,
title = "Obtaining solubility constants to describe the incongruent dissolution of SON68 waste glass by an equilibrium ideal solid solution model approach",
abstract = "One of the waste forms from the Belgian programme for nuclear energy is vitrified high level waste as SON68. When exposed to distilled or synthetic interstitial clay water, SON68 dissolves incongruently meaning that some elements (Si, Al, Ca) are less soluble than others (B, Li, Na). The objective of this study is to describe the composition of the leachant in contact with inactive SON68 glass by assuming congruent glass dissolution and formation of a secondary solid phase represented as an ideal solid solution in equilibrium with the leachant. Experimental SON68-glass dissolution data in distilled water were available at three temperatures. The solubility of the different end members in the solid solution is optimized using data at each temperature. The temperature dependence of the end members was described by Van 't Hoff equation. In this way, one model describe the composition of the leachant and the secondary phase during glass dissolution at different temperatures. The model, calibrated for the distilled water system could successfully describe the composition of the leachant in dissolution experiments in a synthetic clay water system. This study shows that geochemical model approach allows a macroscopic description of the incongruent dissolution for different temperatures or reaction progresses.",
keywords = "SON68, geochemical model, solid solutions, glass dissolution",
author = "Diederik Jacques and Karel Lemmens",
note = "Score = 1; MRS 2005. 29th International Symposium on the Scientific Basis for Nuclear Waste Management ; Conference date: 12-09-2005 Through 16-09-2005",
year = "2006",
month = jun,
language = "English",
isbn = "978-1-55899-889-6",
pages = "337--344",
booktitle = "Symposium Proceedings. Scientific Basis for Nuclear Waste Management XXIX",

}

RIS - Download

TY - GEN

T1 - Obtaining solubility constants to describe the incongruent dissolution of SON68 waste glass by an equilibrium ideal solid solution model approach

AU - Jacques, Diederik

AU - Lemmens, Karel

N1 - Score = 1

PY - 2006/6

Y1 - 2006/6

N2 - One of the waste forms from the Belgian programme for nuclear energy is vitrified high level waste as SON68. When exposed to distilled or synthetic interstitial clay water, SON68 dissolves incongruently meaning that some elements (Si, Al, Ca) are less soluble than others (B, Li, Na). The objective of this study is to describe the composition of the leachant in contact with inactive SON68 glass by assuming congruent glass dissolution and formation of a secondary solid phase represented as an ideal solid solution in equilibrium with the leachant. Experimental SON68-glass dissolution data in distilled water were available at three temperatures. The solubility of the different end members in the solid solution is optimized using data at each temperature. The temperature dependence of the end members was described by Van 't Hoff equation. In this way, one model describe the composition of the leachant and the secondary phase during glass dissolution at different temperatures. The model, calibrated for the distilled water system could successfully describe the composition of the leachant in dissolution experiments in a synthetic clay water system. This study shows that geochemical model approach allows a macroscopic description of the incongruent dissolution for different temperatures or reaction progresses.

AB - One of the waste forms from the Belgian programme for nuclear energy is vitrified high level waste as SON68. When exposed to distilled or synthetic interstitial clay water, SON68 dissolves incongruently meaning that some elements (Si, Al, Ca) are less soluble than others (B, Li, Na). The objective of this study is to describe the composition of the leachant in contact with inactive SON68 glass by assuming congruent glass dissolution and formation of a secondary solid phase represented as an ideal solid solution in equilibrium with the leachant. Experimental SON68-glass dissolution data in distilled water were available at three temperatures. The solubility of the different end members in the solid solution is optimized using data at each temperature. The temperature dependence of the end members was described by Van 't Hoff equation. In this way, one model describe the composition of the leachant and the secondary phase during glass dissolution at different temperatures. The model, calibrated for the distilled water system could successfully describe the composition of the leachant in dissolution experiments in a synthetic clay water system. This study shows that geochemical model approach allows a macroscopic description of the incongruent dissolution for different temperatures or reaction progresses.

KW - SON68

KW - geochemical model

KW - solid solutions

KW - glass dissolution

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_30820

UR - http://knowledgecentre.sckcen.be/so2/bibref/3531

M3 - In-proceedings paper

SN - 978-1-55899-889-6

SP - 337

EP - 344

BT - Symposium Proceedings. Scientific Basis for Nuclear Waste Management XXIX

CY - Warrendale, United States

T2 - MRS 2005. 29th International Symposium on the Scientific Basis for Nuclear Waste Management

Y2 - 12 September 2005 through 16 September 2005

ER -

ID: 316581