Sorption of Sr and Cs onto Czech natural bentonite: experiments and modelling

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46356088%3A_____%2F18%3AN0000005" target="_blank" >RIV/46356088:_____/18:N0000005 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/18:00325889

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s10967-018-6196-3" target="_blank" >http://dx.doi.org/10.1007/s10967-018-6196-3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10967-018-6196-3" target="_blank" >10.1007/s10967-018-6196-3</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Sorption of Sr and Cs onto Czech natural bentonite: experiments and modelling

Popis výsledku v původním jazyce

Within the development of deep geologic repository in the Czech Republic, the local Mg/Ca bentonite has been tested with the aim to assess its sorption qualities with regard to cations of interest for the performance assessment (PA) of the repository. The data of Sr and Cs sorption obtained by batch method were evaluated with the use of ion exchange and surface complexation models. The selectivity coefficients of exchangeable cations were determined, and the selectivity coefficient of Sr was set to be the same as for Ca. The selectivity coefficient of Cs was chosen in accordance with literature and the concentration and stability constant of the surface complex was fitted. One-site ion exchange model for Sr sorption was able to predict the observed K-d dependence on solid-to-liquid ratio. Two-site ion exchange/surface complexation model for Cs sorption simulated the dual sorption mechanism of Cs adequately, thus the predictive ability was lower due to the fact that the protonation of edge sites or competition with Na ion was not taken into account.

Název v anglickém jazyce

Sorption of Sr and Cs onto Czech natural bentonite: experiments and modelling

Popis výsledku anglicky

Within the development of deep geologic repository in the Czech Republic, the local Mg/Ca bentonite has been tested with the aim to assess its sorption qualities with regard to cations of interest for the performance assessment (PA) of the repository. The data of Sr and Cs sorption obtained by batch method were evaluated with the use of ion exchange and surface complexation models. The selectivity coefficients of exchangeable cations were determined, and the selectivity coefficient of Sr was set to be the same as for Ca. The selectivity coefficient of Cs was chosen in accordance with literature and the concentration and stability constant of the surface complex was fitted. One-site ion exchange model for Sr sorption was able to predict the observed K-d dependence on solid-to-liquid ratio. Two-site ion exchange/surface complexation model for Cs sorption simulated the dual sorption mechanism of Cs adequately, thus the predictive ability was lower due to the fact that the protonation of edge sites or competition with Na ion was not taken into account.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20305 - Nuclear related engineering; (nuclear physics to be 1.3);

Projekt

—

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Journal of Radioanalytical and Nuclear Chemistry

ISSN

0236-5731

e-ISSN

1588-2780

Svazek periodika

318

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

2257-2262

Kód UT WoS článku

000451746300081

EID výsledku v databázi Scopus

2-s2.0-85054765717