Magnetite Formation by the Novel Fe(III)-reducing Geothrix fermentans Strain HradG1 Isolated from a Hydrocarbon-Contaminated Sediment with Increased Magnetic Susceptibility

Nicole Klueglein, Tina Lösekann-Behrens, Martin Obst, Sebastian Behrens, Erwin Appel, Andreas Kappler

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Surface sediments at the former military base Hradcany, Czech Republic, heavily contaminated with hydrocarbons, were remediated over years by air-sparging. The sediments show a strong magnetic enhancement at the groundwater fluctuation zone. Here we describe the isolation of a new Fe(III)-reducing and magnetite-producing bacterial strain Geothrix fermentans HradG1from this magnetic and redox-dynamic layer. This isolation underlines that the genus Geothrix is a relevant group of bacteria in hydrocarbon-contaminated environments that undergo dynamic oxic-anoxic redox fluctuations. The Fe(III)-reducing metabolic activity of these organisms potentially leads to changing magnetic soil properties that can potentially be used to identify biogeochemical hotspots.

Original languageEnglish (US)
Pages (from-to)863-873
Number of pages11
JournalGeomicrobiology Journal
Volume30
Issue number10
DOIs
StatePublished - Nov 1 2013

Keywords

  • biodegradation
  • biomineralization
  • groundwater
  • iron reduction
  • molecular ecology

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