Kinetics of plutonium and americium sorption to natural clay

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F12%3A00202735" target="_blank" >RIV/68407700:21340/12:00202735 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jenvrad.2011.07.012" target="_blank" >http://dx.doi.org/10.1016/j.jenvrad.2011.07.012</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jenvrad.2011.07.012" target="_blank" >10.1016/j.jenvrad.2011.07.012</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Kinetics of plutonium and americium sorption to natural clay

Popis výsledku v původním jazyce

Kinetics of Pu(IV) and Am(III) sorption from natural groundwater to three types of clays were studied at trace concentrations of the elements. Higher Kd values were determined for sorption of Pu than of Am, and no clear dependence of the Kd values and the kinetic coefficients on the composition of the clays can be deduced. Kinetic data evaluated by models for six different control processes indicated a sorption mechanism controlled by Pu or Am diffusion in the inert layer on the surface of the clays. Apart from the kinetics of the elements sorption, time-dependent changes in their bonding nature were also studied using a sequential extraction. It was found that Pu(IV) was predominantly associated with amorphous and crystalline Fe oxides as well as natural organic matter sites on the clays, whereas in the case of Am(III) the exchangeable and carbonate sites played the principal role.

Název v anglickém jazyce

Kinetics of plutonium and americium sorption to natural clay

Popis výsledku anglicky

Kinetics of Pu(IV) and Am(III) sorption from natural groundwater to three types of clays were studied at trace concentrations of the elements. Higher Kd values were determined for sorption of Pu than of Am, and no clear dependence of the Kd values and the kinetic coefficients on the composition of the clays can be deduced. Kinetic data evaluated by models for six different control processes indicated a sorption mechanism controlled by Pu or Am diffusion in the inert layer on the surface of the clays. Apart from the kinetics of the elements sorption, time-dependent changes in their bonding nature were also studied using a sequential extraction. It was found that Pu(IV) was predominantly associated with amorphous and crystalline Fe oxides as well as natural organic matter sites on the clays, whereas in the case of Am(III) the exchangeable and carbonate sites played the principal role.

Druh

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

CEP obor

DL - Jaderné odpady, radioaktivní znečištění a kontrola

OECD FORD obor

—

Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

Journal of Environmental Radioactivity

ISSN

0265-931X

e-ISSN

—

Svazek periodika

108

Číslo periodika v rámci svazku

June

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

41-49

Kód UT WoS článku

000303225200008

EID výsledku v databázi Scopus

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