Difúze 99-technecia ve zhutněném bentonitu za aerobních a anaerobních podmínek

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F06%3A00016649" target="_blank" >RIV/60461373:22340/06:00016649 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Diffusion of 99-technetium in compacted bentonite under aerobic and anaerobic conditions

Popis výsledku v původním jazyce

The main aim of this study was to investigate diffusion of technetium 99Tc in different conditions. Because technetium represents one of the most dangerous fission products due to its very long halftime and high mobility in aerobic conditions diffusion experiments of technetium (as 99TcO4- anion) in Czech bentonite from Rokle locality were carried out. For performance and evaluation of experiments the through-diffusion method was chosen and apparent (Da) and effective (De) diffusion coefficients were evaluated. The effects of particle mesh-size, dry bulk density and aerobic or anaerobic conditions on diffusion were studied. In the presence of oxygen, technetium occurs in oxidation state VII, as anion, which is soluble and mobile in the environment, butin reducing conditions occurs in lower oxidation states, mainly as insoluble oxides or hydroxides. Aerobic experiments were carried out in laboratory conditions and anaerobic experiments were performed in a nitrogen atmosphere in a glove

Název v anglickém jazyce

Diffusion of 99-technetium in compacted bentonite under aerobic and anaerobic conditions

Popis výsledku anglicky

The main aim of this study was to investigate diffusion of technetium 99Tc in different conditions. Because technetium represents one of the most dangerous fission products due to its very long halftime and high mobility in aerobic conditions diffusion experiments of technetium (as 99TcO4- anion) in Czech bentonite from Rokle locality were carried out. For performance and evaluation of experiments the through-diffusion method was chosen and apparent (Da) and effective (De) diffusion coefficients were evaluated. The effects of particle mesh-size, dry bulk density and aerobic or anaerobic conditions on diffusion were studied. In the presence of oxygen, technetium occurs in oxidation state VII, as anion, which is soluble and mobile in the environment, butin reducing conditions occurs in lower oxidation states, mainly as insoluble oxides or hydroxides. Aerobic experiments were carried out in laboratory conditions and anaerobic experiments were performed in a nitrogen atmosphere in a glove

Druh

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

CEP obor

CB - Analytická chemie, separace

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2006

Kód důvěrnosti údajů

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

Název periodika

Czechoslovak Journal of Physics

ISSN

0011-4626

e-ISSN

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Svazek periodika

56

Číslo periodika v rámci svazku

D

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

13

Strana od-do

665-672

Kód UT WoS článku

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EID výsledku v databázi Scopus

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