Reaction of bentonites with pyrite concentrate after wetting and drying cycles at 80 degrees C: relevance to radioactive waste (Radwaste) storage

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F12%3A33142133" target="_blank" >RIV/61989592:15310/12:33142133 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1180/claymin.2012.047.4.06" target="_blank" >http://dx.doi.org/10.1180/claymin.2012.047.4.06</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1180/claymin.2012.047.4.06" target="_blank" >10.1180/claymin.2012.047.4.06</a>

Result language
angličtina
Original language name
Reaction of bentonites with pyrite concentrate after wetting and drying cycles at 80 degrees C: relevance to radioactive waste (Radwaste) storage
Original language description
The mineral stability of two bentonites was studied in the presence of pyrite concentrate to simulate the possible reactions between the bentonite barrier used in a high-level nuclear waste (El LW) repository and host rock containing up to 5 wt.% of admixed pyrite. Smectite was the only bentonite mineral affected by pyrite treatment under the experimental conditions used. Bentonites reacted differently with pyrite due to the different nature of the smectites. The distinct crystal chemistry of the smectites controlled by the composition of the parent rocks influenced the smectite surface properties (cation exchange capacity and layer charge distribution) which resulted in a different response of the bentonites to pyrite treatment. A partial transformation of the original smectites into H-smectites represented the initial stage of smectite destabilization on acid attack. Rising non-equivalent isomorphous substitution in the octahedral sheets of the smectites enhanced smectite reactivity
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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