Cs-137 transport in crushed granitic rock: The effect of bentonite colloids

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46356088%3A_____%2F18%3AN0000010" target="_blank" >RIV/46356088:_____/18:N0000010 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.apgeochem.2018.06.005" target="_blank" >http://dx.doi.org/10.1016/j.apgeochem.2018.06.005</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apgeochem.2018.06.005" target="_blank" >10.1016/j.apgeochem.2018.06.005</a>

Result language

angličtina

Original language name

Cs-137 transport in crushed granitic rock: The effect of bentonite colloids

Original language description

The paper focuses on the study of caesium transport through crushed granite in the presence of bentonite colloids in a dynamic column arrangement with the continuous input of the liquid phase. The aim of the experiments was to investigate the effect of the presence of bentonite colloids on the behaviour of caesium in granitic rock. The behaviour of the tracer was studied under aerobic conditions applying a constant tracer concentration (activity) and constant flow rate. Defined volumes of the liquid phase were sampled periodically at the outlet of the column for the measurement of tracer concentrations (activity). Transport was described by means of breakthrough curves. The stepwise approach included the following steps: 1) the non sorbing tracer H-3 was used to evaluate the hydrodynamic properties of the column; 2) the conducing of a column experiment with bentonite colloids in deionised water; 3) the migration of Cs-137 in two liquid phases (deionised and synthetic granitic water); 4) the study of the transport of the radiocolloid suspension in deionised water. The results revealed the completely different behaviour of the bentonite colloids and the caesium in the granitic column and the effect of colloid particles on caesium sorption on granite. The bentonite colloids behaved as conservative non-sorbing tracers whereas, conversely, caesium sorbed strongly on the granitic material. It was determined that the behaviour of the caesium in the granitic rock was influenced by the strong sorption of caesium with respect to the bentonite colloids. A minor part of the caesium irreversibly sorbed on the bentonite colloids and passed through the granite immediately together with the bentonite colloids, and a major part of the caesium was desorbed from the bentonite colloids and was retained in the granite.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20701 - Environmental and geological engineering, geotechnics

Project

—

Continuities

R - Projekt Ramcoveho programu EK

Publication year

2018

Confidentiality

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

Name of the periodical

Applied Geochemistry

ISSN

0883-2927

e-ISSN

—

Volume of the periodical

96

Issue of the periodical within the volume

September

Country of publishing house

GB - UNITED KINGDOM

Number of pages

7

Pages from-to

55-61

UT code for WoS article

000442098100006

EID of the result in the Scopus database

2-s2.0-85048881902