Influence of air oxidation and anaerobic biodegradation on the organic matter of oligocene Boom clay formation (Mol, Belgium) : Consequences on the formation of the soluble organic species ; Influences de l'oxydation et de la biodégradation anaérobie sur la matière organique de l'argile oligocène de Boom (Mol, Belgique) : Conséquences sur la formation d'espèces organiques hydrosolubles
The Boom Clay was focused because it is identified by SCK-CEN as a possible radioactive waste storage in the geological disposal site and in situ experiments are performed in the underground laboratory of Mol (Belgium). In this context, it is important to assess the consequences of galleries excavation on the properties of the Boom Clay. The particular focus of this study is the effects of air oxidation and anaerobic biodegradation on the OM. The experiments dealing with the effects of air oxidation have combined studies of artificial oxidized samples (artificial series) and samples altered in... Mehr ...
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Dokumenttyp: | doctoralThesis |
Erscheinungsdatum: | 2011 |
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HAL CCSD
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Schlagwörter: | Organic matter / Boom Clay / Dissolved organic matter / Oxidation / Anaerobic biodegradation / Geological disposal / Storage of nuclear wastes / Matière organique / Argiles de Boom / Matière organique hydrosoluble / Oxydation / Biodégradation anaérobie / Stockage de déchets nucléaire / Déchets radioactifs -- Élimination dans le sol / Argile / Matière organique-Biodégradation / [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
Sprache: | Französisch |
Permalink: | https://search.fid-benelux.de/Record/base-26999973 |
Datenquelle: | BASE; Originalkatalog |
Powered By: | BASE |
Link(s) : | https://hal.univ-lorraine.fr/tel-01749442 |
The Boom Clay was focused because it is identified by SCK-CEN as a possible radioactive waste storage in the geological disposal site and in situ experiments are performed in the underground laboratory of Mol (Belgium). In this context, it is important to assess the consequences of galleries excavation on the properties of the Boom Clay. The particular focus of this study is the effects of air oxidation and anaerobic biodegradation on the OM. The experiments dealing with the effects of air oxidation have combined studies of artificial oxidized samples (artificial series) and samples altered in the gallery of the underground laboratory (natural series). These experiments focus on the Kerogen, the EOM and the DOM. The comparison of data from artificial and natural series shows firstly that our experimental simulations are the representative of processes taking place in the galleries. These studies show that air oxidation induced (i) a significant increase in the amount of DOM and (ii) a major change in the chemistry of the EOM and DOM characterized by the formation of low molecular weight oxygenated molecules. Moreover, comparison between water extracted from altered samples and piezometers shows that the water of the site is not affected by oxidation processes. The piezometer water samples are similar to that extracted from non-altered samples. Biodegradation experiments conducted on non altered and artificially oxidized clay did not show significant changes of fossil and dissolved organic matter. It seems that anaerobic biodegradation is not a major process in the context of disturbances induced by the excavation ; Les Argiles de Boom ont été identifiées par le SCK-CEN comme un éventuel site de stockage de déchets nucléaires en couche géologique profonde : elles font l'objet d'études dans le laboratoire souterrain de Mol (Belgique). Dans ce contexte, il est important d'évaluer les conséquences du creusement de galeries sur les propriétés de ces Argiles. Ce travail de thèse cible plus particulièrement les effets ...