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Influence of hydrogen in the presence of organic matter on bacterial activity under radioactive waste disposal conditions

Camille Chautard 1, 2 A. Ritt 2 M. Libert 3 Laurent de Windt 1
3 LMTE - Laboratoire de Modélisation des Transferts dans l'Environnement
SMTA - Service Mesures et modélisation des Transferts et des Accidents graves : DEN/DTN
Abstract : According to the French design for the disposal of high level radioactive waste (HLW), waste will be emplaced in an environment involving metallic materials into a geological clay formation. The presence of microorganisms has recently been evidenced in such environments. Therefore, at this state of knowledge, the introduction of microbial species during the construction and operational phases as well as the survival of bacteria after the disposal closure are to be accounted for in safety assessment context. Sulfate- reducing bacteria (SRB) activities are notably expected to have an impact on corrosion processes and thus to influence the evolution of metallic and clayey materials involved in a HLW disposal cell. The present work investigates the potential development of a SRB, Thermodesulfovibrio hydrogeniphilus, in order to better assess its metabolism in the presence of dissolved organic matter (DOM), representative of the DOM present in an argillaceous pore water, and hydrogen which will be produced by the anaerobic corrosion of metallic materials. After 49 days of batch experiments, hydrogen enhances the bacterial development in presence of a low amount of DOM, whereas the DOM alone does not seem to sustain bacteria activities.
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https://hal-mines-paristech.archives-ouvertes.fr/hal-00820358
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Soumis le : jeudi 3 novembre 2016 - 10:52:04
Dernière modification le : jeudi 24 septembre 2020 - 16:34:19
Archivage à long terme le : : samedi 4 février 2017 - 12:10:29

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  • HAL Id : hal-00820358, version 1

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Camille Chautard, A. Ritt, M. Libert, Laurent de Windt. Influence of hydrogen in the presence of organic matter on bacterial activity under radioactive waste disposal conditions. Water Rock Interaction [WRI 14], Jun 2013, Avignon, France. pp.147 - 150. ⟨hal-00820358⟩

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