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dc.contributor.author Mitchell, Andrew Charles
dc.contributor.author Phillips, Adrienne J.
dc.contributor.author Hiebert, Randy
dc.contributor.author Gerlach, Robin
dc.contributor.author Spangler, Lee H.
dc.contributor.author Cunninghamam, Alfred B.
dc.date.accessioned 2010-12-03T15:08:47Z
dc.date.available 2010-12-03T15:08:47Z
dc.date.issued 2009-01
dc.identifier.citation Mitchell , A C , Phillips , A J , Hiebert , R , Gerlach , R , Spangler , L H & Cunninghamam , A B 2009 , ' Biofilm enhanced geologic sequestration of supercritical CO2 ' International Journal of Greenhouse Gas Control , vol 3 , no. 1 , pp. 90-99 . , 10.1016/j.ijggc.2008.05.002 en
dc.identifier.issn 1750-5836
dc.identifier.other PURE: 154574
dc.identifier.other dspace: 2160/5981
dc.identifier.uri http://hdl.handle.net/2160/5981
dc.identifier.uri http://www.sciencedirect.com/science/journal/17505836 en
dc.description Mitchell, A. C., Phillips, A., Heibert, R., Gerlach, R., Cunningham, A., Spangler, L. (2009). Biofilm enhanced geologic sequestration of supercritical CO2. International Journal of Greenhouse Gas Control, 3 (1), 90-99. A Mitchell came to AU in 2009. Sponsorship: Zero Emissions Research Technology (ZERT) fund, from the U.S. Department of Energy (DOE), Award No. DE-FC26-04NT42262. en
dc.description.abstract In order to develop subsurface CO2 storage as a viable engineered mechanism to reduce the emission of CO2 into the atmosphere, any potential leakage of injected supercritical CO2 (SC-CO2) from the deep subsurface to the atmosphere must be reduced. Here, we investigate the utility of biofilms, which are microorganism assemblages firmly attached to a surface, as a means of reducing the permeability of deep subsurface porous geological matrices under high pressure and in the presence of SC-CO2, using a unique high pressure (8.9 MPa), moderate temperature (32 °C) flow reactor containing 40 millidarcy Berea sandstone cores. The flow reactor containing the sandstone core was inoculated with the biofilm forming organism Shewanella fridgidimarina. Electron microscopy of the rock core revealed substantial biofilm growth and accumulation under high-pressure conditions in the rock pore space which caused >95% reduction in core permeability. Permeability increased only slightly in response to SC-CO2 challenges of up to 71 h and starvation for up to 363 h in length. Viable population assays of microorganisms in the effluent indicated survival of the cells following SC-CO2 challenges and starvation, although S. fridgidimarina was succeeded by Bacillus mojavensis and Citrobacter sp. which were native in the core. These observations suggest that engineered biofilm barriers may be used to enhance the geologic sequestration of atmospheric CO2. en
dc.format.extent 10 en
dc.language.iso eng
dc.relation.ispartof International Journal of Greenhouse Gas Control en
dc.subject Carbon sequestration en
dc.subject Microorganism en
dc.subject Supercritical CO2 en
dc.subject Biofilm en
dc.subject Porous media en
dc.subject Permeability en
dc.subject Biomineralization en
dc.subject Climate change en
dc.title Biofilm enhanced geologic sequestration of supercritical CO2 en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.description.version preprint en
dc.identifier.doi http://dx.doi.org/10.1016/j.ijggc.2008.05.002
dc.contributor.institution Other IGES Research en
dc.contributor.institution Institute of Geography & Earth Sciences en
dc.description.status Peer reviewed en


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