Title: Determining the Terminal Electron-Accepting Reaction in the Saturated Subsurface
Abstract: Chapter 69 Determining the Terminal Electron-Accepting Reaction in the Saturated Subsurface Richard L. Smith, Richard L. SmithSearch for more papers by this authorSteve H. Harris Jr., Steve H. Harris Jr.Search for more papers by this author Richard L. Smith, Richard L. SmithSearch for more papers by this authorSteve H. Harris Jr., Steve H. Harris Jr.Search for more papers by this author Book Editor(s):Christon J. Hurst, Christon J. Hurst Department of Biology, Xavier University, Cincinnati, Ohio Facultad de Ingeniería, Universidad del Valle, Ciudad Universitaria Meléndez, Santiago de Cali, ColombiaSearch for more papers by this authorRonald L. Crawford, Ronald L. Crawford Environmental Biotechnology Institute University of Idaho, Moscow, IdahoSearch for more papers by this authorJay L. Garland, Jay L. Garland Dynamac Corporation Kennedy Space Center, FloridSearch for more papers by this authorDavid A. Lipson, David A. Lipson Department of Biology, San Diego State University, San Diego, CaliforniaSearch for more papers by this authorAaron L. Mills, Aaron L. Mills Department of Environmental Sciences, University of Virginia, Charlottesville, VirginiaSearch for more papers by this authorLinda D. Stetzenbach, Linda D. Stetzenbach Department of Environmental and Occupational Health, School of Public Health, University of Nevada, Las Vegas, Las Vegas, NevadaSearch for more papers by this author First published: 14 May 2007 https://doi.org/10.1128/9781555815882.ch69Citations: 1 AboutPDFPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShareShare a linkShare onFacebookTwitterLinked InRedditWechat Summary Microorganisms obtain their energy for metabolism by catalyzing a variety of oxidation-reduction reactions. The distribution of the terminal electron-accepting reactions in an aquifer is dictated by several factors. The sequence of terminal electron-accepting reactions occurs in the order shown in a table, but very long periods can be necessary before the supply of a given electron acceptor is depleted. Determining whether aerobic respiration is the dominant terminal process is relatively straightforward. When oxygen is present, it is the electron acceptor, not only for the thermodynamic reasons but also because it is toxic to the obligately anaerobic processes (iron reduction, sulphate reduction, and methanogenesis) and inhibits the expression and the function of the denitrification enzymes. In many aspects, iron reduction differs from the other terminal electron-accepting reactions. The substrate, Fe(III), is present in many forms, all crystalline solids, and often in large quantities in the saturated subsurface. Concentrations of dissolved hydrogen can serve as an additional indicator of the predominant terminal electron-accepting reaction. An integral part of future characterizations and insights regarding microbial communities in the subsurface must necessarily involve the context of the terminal electron-accepting reactions. Manual of Environmental Microbiology, Third Edition RelatedInformation
Publication Year: 2007
Publication Date: 2007-05-14
Language: en
Type: other
Indexed In: ['crossref']
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Cited By Count: 24
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