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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Clay Minerals: journal of the European Clay Groups

ISSN

0009-8558

e-ISSN

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Svazek periodika

47

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

465-479

Kód UT WoS článku

000312681700006

EID výsledku v databázi Scopus

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