Impact of iron-reducing bacteria on the properties of argillites in the context of radioactive waste geological disposal
| Autor: | Christian Mustin, Michel Jullien, Marie Libert, Loïc Esnault, F. Marsal, Olivier Bildstein |
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| Přispěvatelé: | ECOGEOSAFE, Département Technologie Nucléaire (DTN), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Terre et Environnement de Lorraine (OTELo), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), PRP-DGE/SEDRAN/BERIS, Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Bureau d'Expertise et de Recherche sur les Installations de Stockage (IRSN/PRP-DGE/SEDRAN/BERIS), Service d'expertise des Déchets Radioactifs et de la radioactivité Naturelle (IRSN/PRP-DGE/SEDRAN), Institut de Radioprotection et de Sûreté Nucléaire (IRSN)-Institut de Radioprotection et de Sûreté Nucléaire (IRSN) |
| Rok vydání: | 2013 |
| Předmět: |
Argillites
Geochemistry Context (language use) Experimental laboratory 010502 geochemistry & geophysics 01 natural sciences Geological disposal 03 medical and health sciences Iron bacteria Geochemistry and Petrology Bacterial activity Illite-smectite [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment 0105 earth and related environmental sciences 0303 health sciences 030306 microbiology Radioactive waste Geology Fe(III) reduction Clay alteration Iron reducing bacteria [SDU]Sciences of the Universe [physics] [SDE]Environmental Sciences Clay minerals Indigenous microorganisms Waste disposal |
| Zdroj: | Applied Clay Science Applied Clay Science, Elsevier, 2013, 83-84, pp.42-49. ⟨10.1016/j.clay.2013.08.018⟩ Applied Clay Science, 2013, 83-84, pp.42-49. ⟨10.1016/j.clay.2013.08.018⟩ |
| ISSN: | 0169-1317 |
| DOI: | 10.1016/j.clay.2013.08.018 |
| Popis: | International audience; The presence of indigenous microorganisms in deep clayey geological formations raises the issue, regarding radioactive waste geological disposal, of the influence of bacterial activity on the confinement properties of materials, including the clayey host rock. Iron-reducing bacteria (IRB) activity is assessed in batch experiments in the presence of argillite samples from an in situ experimental laboratory at Tournemire (Aveyron, France). The results show the availability of structural Fe(III) from the clay minerals for biochemical reactions (bioreduction). In laboratory conditions, a significant impact of IRB on the alteration of clay minerals, mainly the illite-smectite mixed layer (I-Sm), is indeed observed. Such reactions may locally modify the physicochemical conditions and the stability of clay minerals (essentially smectites) prevailing in such deep facilities. More generally, bacterial activity could play an important role on clay mineral alteration and in situ experiments need to be performed in order to quantify the reaction rates and show the representative of these phenomena in the framework of the safety assessment of waste disposal. |
| Databáze: | OpenAIRE |
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