Microbial Reduction of Fe(III) in the Fithian and Muloorina Illites: Contrasting Extents and Rates of Bioreduction

Abstract

Shewanella putrefaciens CN32 reduces Fe(III) within illites which have different properties: the Fithian bulk fraction and the <0.2 micrometer fraction of Muloorina. The Fithian illite contained 4.6% (w/w) total Fe, 81% of which was Fe(III). It was dominated by illite with some jarosite (~32% of the total Fe(III) and goethite (11% of the total Fe(III)). the Muloorina illite was pure and contained 9.2% Fe, 93% of which was Fe(III). Illite suspensions were buffered at pH 7 and were inoculated with CN32 cells with lactate as the electron donor. Select treatments included anthraquinone-2,6-disulfonate (AQDS) as an electron shuttle. Bioproduction of Fe(II) was determined by ferrozine analysis. the unreduced and bioreduced solids were characterized by Mossbauer spectroscopy, X-ray diffraction and transmission electron .

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Document Details

Document Type
Technical Report
Publication Date
Jul 18, 2005
Accession Number
ADA450666

Entities

People

  • Dennis D. Eberl
  • Hailiang Dong
  • Jennifer L. Seabaugh
  • Jinwook Kim
  • John P. Morton
  • Ravi K Kukkadapu

Organizations

  • University of Miami

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemical Compounds
  • Chemical Synthesis
  • Chemistry
  • Diffraction
  • Ecology
  • Electron Donors
  • Electron Microscopy
  • Materials
  • Microscopy
  • Mineralogy
  • Minerals
  • Phyllosilicates
  • Soil Science
  • Spectra
  • Spectroscopy
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Environmental science

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  • Mathematics or Statistics
  • Microbial Pathology
  • Solar Physics

Technology Areas

  • Biotechnology
  • Microelectronics