Biogenesis of Magnetite Nanoparticles Using Shewanella Species Isolated from Diverse Regions
The objective of this study was to synthesize magnetite (Fe3O4) nanoparticles using diverse Shewanella species isolated from different environments. Magnetite formation experiments were performed with 11 species of Shewanella using akaganeite (β-FeOOH)
as an electron acceptor and lactate (C3H6O3) as an electron donor under a N2 atmosphere at room temperature. Magnetites and other products formed by the bacteria were characterized by XRD and TEM-EDS analyses. In this study, all the strains of Shewanella
species produced magnetite nanoparticles with 2.5 to 20 nm in size. However, the size of the magnetite varied with the species of Shewanella, and a few species formed Fe(III) oxide as secondary minerals such as goethite and lepidocrocite. These results indicate that different species
of iron-reducing bacteria belonging to the genus Shewanella exhibit different rates of Fe(III) reduction resulting in magnetite nanocrystals of varying size and formation of secondary mineral species.
Keywords: Fe(III)-Reducing Bacteria; Magnetite; Nanoparticles; Shewanella Species
Document Type: Research Article
Affiliations: 1: Jeonnam Regional Headquarters, Korea Rural Community Corporation, 62359, Gwangju, Korea 2: Department of Earth and Environmental Sciences, Chonnam National University, 61186, Gwangju, Korea
Publication date: 01 February 2019
- Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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