Interactions dans un système césium, strontium/matière organique naturelle/argiles des sols. De la décontamination à la remédiation

Abstract : This study is part of the DEMETERRES project, which aims to develop new methods and technologies in the field of decontamination and remediation of contaminated soils and effluents after a nuclear accident. The objective of this PhD is to obtain a better knowledge of 137Cs and 90Sr interactions onto agricultural soils and to better predict the chemical state of these elements in soils after a nuclear accident. A database in the multi-sites ion exchanger formalism has been built, reflecting the adsorption behaviours of Cs+ and Sr2+ onto illite and smectite (two major clay minerals) with regards to major environmental cations: i.e. H+, Na+, and Ca2+. It was used to predict the adsorption of Cs+ and Sr2+ onto French agricultural soil samples (Pusignan, Etoile-sur-Rhône and Herqueville). Good simulations of the adsorption of Cs+ and Sr2+ onto Pusignan and Etoile-sur-Rhône are obtained. In the case of Herqueville, the removal of NOM does not improve the agreement between experimental results and simulations, but the removal of exchangeable aluminum allows a better representation of the adsorption results of Sr2+ onto Herqueville, but not for Cs+. This work allows efficiently simulating the adsorption of Cs and Sr onto soils and support decontamination and remediation strategies after a nuclear accident.
Complete list of metadatas

https://hal-cea.archives-ouvertes.fr/tel-01813289
Contributor : Pascal Reiller <>
Submitted on : Tuesday, June 12, 2018 - 11:09:11 AM
Last modification on : Friday, January 4, 2019 - 5:33:23 PM
Long-term archiving on : Thursday, September 13, 2018 - 2:40:14 PM

File

SIROUX_Brice_these.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : tel-01813289, version 1

Collections

Citation

Brice Siroux. Interactions dans un système césium, strontium/matière organique naturelle/argiles des sols. De la décontamination à la remédiation. Géochimie. Université Sorbonne Paris Cité - Université Paris Diderot (Paris 7), 2017. Français. ⟨tel-01813289⟩

Share

Metrics

Record views

120

Files downloads

184