Biotransformations of Manganese

Chapter 100 Biotransformations of Manganese Bradley M. Tebo, Bradley M. TeboSearch for more papers by this authorBrian G. Clement, Brian G. ClementSearch for more papers by this authorGregory J. Dick, Gregory J. DickSearch for more papers by this author Bradley M. Tebo, Bradley M. TeboSearch for more papers by this authorBrian G. Clement, Brian G. ClementSearch for more papers by this authorGregory J. Dick, Gregory J. DickSearch 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.ch100Citations: 1 AboutPDFPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShareShare a linkShare onFacebookTwitterLinked InRedditWechat Summary The redox properties of manganese (Mn), make it central to a variety of biological processes and result in significant and often rapid biogeochemical cycling that is mediated by abiotic and biotic oxidation and reduction, biological uptake, and mineral formation. In nature Mn occurs in three different oxidation states, +II, +III, and +IV. Mn(III) and Mn(IV) are found in environmentally prevalent ferromanganese (oxyhydr)oxide minerals, which often occur as layer-type or tunnel-structure minerals. As biotic and abiotic processes both play important roles in the oxidation and reduction of Mn, a major challenge to understanding Mn biotransformations is the differentiation and subsequent quantification of the biotic and abiotic components of the processes. Total manganese concentrations are facilely measured by using the formaldoxime colorimetric technique. In general, two considerations are important for the assays. First, the Mn(II) concentration utilized must not inhibit biological activity. Second, effective abiotic controls must be employed to distinguish biological Mn(II) removal and/or oxidation from the adsorption and autocatalytic oxidation of Mn(II) on Mn oxide surfaces. The assay proceeds with few modifications to the leucoberbelin blue (LBB) and formaldoxime methods and can be scaled to different volumes, Mn concentrations. Manual of Environmental Microbiology, Third Edition RelatedInformation