Long-term corrosion of two nuclear waste reference glasses (MW and SON68): A kinetic and mineral alteration study

Curti, Enzo; Crovisier, J. L.; Morvan, Gilles; Karpoff, Anne Marie

doi:10.1016/j.apgeochem.2006.03.010

Cited by 115 publications

(89 citation statements)

References 16 publications

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“…Curti et al, 2006). The beam size of the X-ray microprobes used in the present investigation was too large for such small particles.…”

Section: Introductionmentioning

confidence: 97%

“…A previous investigation focusing on the longterm dissolution kinetics and aqueous chemistry of both glasses showed that the glass dissolution rates of the MW glass are about ten times faster than for the SON68. This result was ascribed to the presence of Mg in the MW glass, which is supposed to accelerate the glass degradation by favoring the formation of secondary clays (Curti et al, 2006).…”

Section: Introductionmentioning

confidence: 97%

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Na, Mg, Ni and Cs distribution and speciation after long-term alteration of a simulated nuclear waste glass: A micro-XAS/XRF/XRD and wet chemical study

Curti

Dähn

Farges

et al. 2009

Geochimica et Cosmochimica Acta

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“…Curti et al, 2006). The beam size of the X-ray microprobes used in the present investigation was too large for such small particles.…”

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

Na, Mg, Ni and Cs distribution and speciation after long-term alteration of a simulated nuclear waste glass: A micro-XAS/XRF/XRD and wet chemical study

Curti

Dähn

Farges

et al. 2009

Geochimica et Cosmochimica Acta

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“…4) is similar to that of talc (Mg 3 Si 4 O 10 (OH) 2 ). This XANES is also similar to Mg-rich crystallites of montmorillonite, a related phyllosilicate of composition ~(Na,Ca) 0.3 (Al,Mg) 2 Si 4 O 10 (OH) 2 ·n(H 2 O) that was found by TEM in this sample [21]. Comparison of Mo and Fe in SON68 (after 3 months of leaching) vs. Mg in MW (after 12 years of leaching) shows that metal-rich crystallites are formed on both glass surfaces.…”

Section: Long-term Static Experimentsmentioning

confidence: 50%

Durability of Silicate Glasses: An Historical Approach

Farges

Etcheverry

Haddi³

et al. 2007

AIP Conference Proceedings

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Abstract. We present a short review of current theories of glass weathering, including glass dissolution, and hydrolysis of nuclear waste glasses, and leaching of historical glasses from an XAFS perspective. The results of various laboratory leaching experiments at different timescales (30 days to 12 years) are compared with results for historical glasses that were weathered by atmospheric gases and soil waters over 500 to 3000 years. Good agreement is found between laboratory experiments and slowly leached historical glasses, with a strong enrichment of metals at the water/gel interface. Depending on the nature of the transition elements originally dissolved in the melt, increasing elemental distributions are expected to increase with time for a given glass durability context.

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“…This is probably due to the very thin alteration rims (a few μm, see [7]) formed under the selected mild alteration conditions. However, speciation changes are noteworthy on the gels formed under more "aggressive" conditions.…”

Section: Discussionmentioning

confidence: 99%

“…These glasses were previously investigated using ion-beam analyses (RBS, ERDA, PIXE, PIGE [4,6]). Third, we investigated another sample of SON68 composition from Marcoule (labeled "SP1") leached at the Paul Scherrer Institut (Switzerland) for more than 12 years, also under static conditions at 90°C and unconstrained pH 9.6 (in stainless steel vessels) [7]. Its specific surface area is 0.030 ± 0.002 m 2 /g; S/V ~120-0 m -1 ).…”

Section: Methodsmentioning

confidence: 99%

On the Coordination of Actinides and Fission Products in Silicate Glasses

Haddi¹,

Farges²,

Trocellier³

et al. 2007

AIP Conference Proceedings

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Abstract. The local structure around Th, U, Ce and Nd in leached silicate glasses was examined using XAFS spectroscopy at their L 3 edges and also at the K edge of Fe, Co, Ni, Zr and Mo. Pellets of inactive borosilicate glasses with a simplified or a complex composition were leached statically at 90°C, at pH buffered to 0 or 6 for 28 days (surface/volume, S/V, ratios of 0.1 cm -1 ). These glasses are compared to another SON68 sample (denoted "SP1" in this paper) that was statically leached for 12 years under similar conditions, except for a higher S/V of 12 cm -1 and a higher unconstrained pH of 9.6. The speciation of Fe, Co, Ni, Zr and Mo in the simple and the complex unleached are similar. In the statically leached glasses, the speciation of these transition metals is mostly identical to in the unleached glasses, except in the gels formed at the surface of the glasses leached at low pH, where large speciation differences are observed. Surface precipitates, especially for Fe (as ferrihydrite), Mo (possibly sidwillite) and Th (as ThO 2 ) were detected. Finally, the drying of the gels considerably affects the metal speciation by enhancing metal polymerization.

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Long-term corrosion of two nuclear waste reference glasses (MW and SON68): A kinetic and mineral alteration study

Cited by 115 publications

References 16 publications

Na, Mg, Ni and Cs distribution and speciation after long-term alteration of a simulated nuclear waste glass: A micro-XAS/XRF/XRD and wet chemical study

Na, Mg, Ni and Cs distribution and speciation after long-term alteration of a simulated nuclear waste glass: A micro-XAS/XRF/XRD and wet chemical study

Durability of Silicate Glasses: An Historical Approach

On the Coordination of Actinides and Fission Products in Silicate Glasses

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