Molecular hydrogen: An abundant energy source for bacterial activity in nuclear waste repositories
作者： M. Libert , O. Bildstein , L. Esnault , M. Jullien , R. Sellier
DOI: 10.1016/J.PCE.2011.10.010
关键词: Redox 、 Microorganism 、 Autotroph 、 Waste disposal 、 Chemistry 、 Waste management 、 Hydrogen 、 Biosphere 、 Energy source 、 Radioactive waste
摘要: A thorough understanding of the energy sources used by microbial systems in deep terrestrial subsurface is essential since extreme conditions for life biospheres may serve as a model possible nuclear waste repository. In this respect, H2 known one most energetic substrates environments. This hydrogen produced from abiotic and biotic processes but its concentration natural usually maintained at very low levels due to hydrogen-consuming bacteria. A significant amount gas will be within repositories, essentially corrosion metallic components. consequently improve activity specific environment. paper discusses different study cases with experimental results illustrate fact that microorganisms are able use redox (reduction O2, NO3-, Fe III) several disposal conditions. Consequences include: alteration groundwater chemistry shift geochemical equilibria, production or consumption, biocorrosion, potential modifications confinement properties. In order quantify impact bacteria, next step determine kinetic rate reactions realistic
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