Study of 85Sr transport through a column filled with crushed granite in the presence of bentonite colloids

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46356088%3A_____%2F17%3AN0000023" target="_blank" >RIV/46356088:_____/17:N0000023 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1144/SP443.14" target="_blank" >http://dx.doi.org/10.1144/SP443.14</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1144/SP443.14" target="_blank" >10.1144/SP443.14</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Study of 85Sr transport through a column filled with crushed granite in the presence of bentonite colloids

Popis výsledku v původním jazyce

The present work is focused on the study of strontium transport through crushed granite in the presence of bentonite colloids under dynamic arrangement. The aim of the experiments was to investigate the effect of bentonite colloids on strontium migration in crushed granite. The tracer behaviour was studied in a column set-up under aerobic conditions with a continuous inlet of the liquid phase of a constant tracer concentration (activity) and flow rate. Defined volumes of liquid phase were sampled at periodic time intervals at the column outlet for the measurements of tracer concentrations (activity). The transport was described by breakthrough curves. The stepwise approach included these steps: (1) an evaluation of the hydrodynamic column properties by the non-sorbing tracer 3H; (2) a column experiment with bentonite colloids in deionized water was performed; (3) migration of 85Sr solution in two liquid phases (deionized and synthetic granitic water); and (4) the transport of a radiocolloid suspension in deionized water was studied. Results showed different behaviour of bentonite colloids and strontium in the column. Bentonite colloids behaved as a non-sorbing tracer: Conversely, strontium showed strong sorption on granitic material. The strontium transport in the presence of bentonite colloids differed from strontium transport itself. The strontium transport in the presence of colloids was faster than transport without the bentonite colloids. The observed retention of strontium on granite suggests a higher affinity of strontium towards granitic rock than towards bentonite colloids, and showed the reversibility of the sorption of strontium on bentonite colloids.

Název v anglickém jazyce

Study of 85Sr transport through a column filled with crushed granite in the presence of bentonite colloids

Popis výsledku anglicky

The present work is focused on the study of strontium transport through crushed granite in the presence of bentonite colloids under dynamic arrangement. The aim of the experiments was to investigate the effect of bentonite colloids on strontium migration in crushed granite. The tracer behaviour was studied in a column set-up under aerobic conditions with a continuous inlet of the liquid phase of a constant tracer concentration (activity) and flow rate. Defined volumes of liquid phase were sampled at periodic time intervals at the column outlet for the measurements of tracer concentrations (activity). The transport was described by breakthrough curves. The stepwise approach included these steps: (1) an evaluation of the hydrodynamic column properties by the non-sorbing tracer 3H; (2) a column experiment with bentonite colloids in deionized water was performed; (3) migration of 85Sr solution in two liquid phases (deionized and synthetic granitic water); and (4) the transport of a radiocolloid suspension in deionized water was studied. Results showed different behaviour of bentonite colloids and strontium in the column. Bentonite colloids behaved as a non-sorbing tracer: Conversely, strontium showed strong sorption on granitic material. The strontium transport in the presence of bentonite colloids differed from strontium transport itself. The strontium transport in the presence of colloids was faster than transport without the bentonite colloids. The observed retention of strontium on granite suggests a higher affinity of strontium towards granitic rock than towards bentonite colloids, and showed the reversibility of the sorption of strontium on bentonite colloids.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20701 - Environmental and geological engineering, geotechnics

Projekt

—

Návaznosti

R - Projekt Ramcoveho programu EK

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

Radioactive Waste Confinement: Clays in Natural and Engineered Barriers

ISBN

—

ISSN

0305-8719

e-ISSN

—

Počet stran výsledku

11

Strana od-do

1-11

Název nakladatele

Geological Society, London

Místo vydání

London

Místo konání akce

Brussels, Belgium

Datum konání akce

1. 1. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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