The influence of temperature and hydration on the sorption properties of bentonite

Vinšová, Hana; Jedináková-Křížová, V.; Kolarikova, Irena; Adamcová, Jana; Přikryl, Richard; Zeman, Jiřı́

doi:10.1016/j.jenvrad.2007.11.003

Cited by 14 publications

(3 citation statements)

References 25 publications

(18 reference statements)

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“…Unfortunately no analytical evidence is available in Vinšová et al (2008) to support the observations and to compare with our data.…”

Section: Acknowledgmentsmentioning

confidence: 66%

“…The observation of Vinšová et al (2008) indicating illitization and beidelitization of smectite in some local parts of the Mock-Up-CZ experimetal column, were not confirmed even using extremely detailed mineralogical examination. Unfortunately no analytical evidence is available in Vinšová et al (2008) to support the observations and to compare with our data.…”

Section: Acknowledgmentsmentioning

confidence: 89%

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Mineral stability of Fe-rich bentonite in the Mock-Up-CZ experiment

Stricek¹,

Šucha²,

Uhlík³

et al. 2009

Geologica Carpathica

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Abstract:Bentonite is a basic component of most concepts of multibarrier systems in underground radioactive waste repositories. It is important to determine the bentonite stability under the conditions close to the future real situation. The paper brings the detailed mineral and structural analyses of smectites from the bentonitic material exposed to the long term Mock-Up-CZ experiment. The compacted barrier blocks and residual filling contained 85 % of bentonite from the Rokle deposit, 10 % of quartz sand and 5 % of graphite. They were exposed to temperatures of up to 90 °C for almost 4 years. Quantitative mineral analyses, crystal size distributions, FTIR spectra, as well as cation exchange capacity and layer charge density show high mineral stability of the Rokle bentonite under the conditions of Mock-Up-CZ experiment. Small changes in the crystal sizes and slight change in the layer charge as a consequence of the experimental alteration could be linked to the hydration and the variation of the geochemical environment of the experiment.

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“…Unfortunately no analytical evidence is available in Vinšová et al (2008) to support the observations and to compare with our data.…”

Section: Acknowledgmentsmentioning

confidence: 66%

Section: Acknowledgmentsmentioning

confidence: 89%

Mineral stability of Fe-rich bentonite in the Mock-Up-CZ experiment

Stricek¹,

Šucha²,

Uhlík³

et al. 2009

Geologica Carpathica

View full text Add to dashboard Cite

show abstract

“…In the analysis of contaminant migration in the aquatic environment, sorption processes (sorption is intended as the overall mechanisms which remove the contaminant from solution; these processes include cation exchange, precipitation, adsorption and, in general, any binding between solutes and the solid matrix [94]) are essential, which result in the retention of contaminants in the material [97]. It is also known that bentonites have a significant sorption ability for cations, as well as a low water permeability [72,98] and their properties are a function of the content of montmorillonite and the nature and number of interlayer cations [99], which is why it is used in cut-off walls to reduce contaminant migration.…”

Section: Leaching and Immobilization Of Contaminants In Self-hardenin...mentioning

confidence: 99%

Durability, carbon footprint and contaminant immobilization in self-hardening slurries applied to cut-off walls: a review

2023

Archives of Civil Engineering

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Cut-off walls built using self-hardening slurries are an important tool for modern engineering pursuing Sustainable Development Goals. Much like cement concrete, this material is affected by the challenges posed by the increasing human pressure on the environment, although it is used significantly less widely than concrete; for this reason, relatively little comprehensive literature data is available describing the interaction of self-hardening slurries with the environment. This article provides a review that complements the current state of knowledge on self-hardening slurries in this area, with a particular focus on the durability of the material and its pollutant immobilization capabilities. To provide context, the material's operating conditions, properties and components are briefly characterized. The resistance of self-hardening slurries to environmental aggression is described extensively, as it is a key factor in ensuring the durability of the material. A sample analysis of the material's carbon footprint in several representative composition variants is presented. The subject of pollutant immobilization by self-hardening slurries is outlined. Lines of further research are proposed to fill gaps in the available knowledge.

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