Journal ArticleDOI
Oxidation of aromatic contaminants coupled to microbial iron reduction
Derek R. Lovley,Mary Jo Baedecker,Debra J. Lonergan,Isabella M. Cozzarelli,Elizabeth J. P. Phillips,Donald I. Siegel +5 more
TLDR
It is shown that in aquatic sediments, microbial activity is necessary for the oxidation of model aromatic compounds coupled to Fe(III) reduction, providing the first example of an organism of any type which can oxidize an aromatic hydrocarbon anaerobically.Abstract:
THE contamination of sub-surface water supplies with aromatic compounds is a significant environmental concern1,2. As these contaminated sub-surface environments are generally anaerobic, the microbial oxidation of aromatic compounds coupled to nitrate reduction, sulphate reduction and methane production has been studied intensively1–7. In addition, geochemical evidence suggests that Fe(III) can be an important electron acceptor for the oxidation of aromatic compounds in anaerobic groundwater. Until now, only abiological mechanisms for the oxidation of aromatic compounds with Fe(III) have been reported8–12. Here we show that in aquatic sediments, microbial activity is necessary for the oxidation of model aromatic compounds coupled to Fe(III) reduction. Furthermore, a pure culture of the Fe(III)-reducing bacterium GS-15 can obtain energy for growth by oxidizing benzoate, toluene, phenol or p-cresol with Fe(III) as the sole electron acceptor. These results extend the known physiological capabilities of Fe(III)-reducing organisms and provide the first example of an organism of any type which can oxidize an aromatic hydrocarbon anaerobically.read more
Citations
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Journal ArticleDOI
Dissimilatory Fe(III) and Mn(IV) reduction.
TL;DR: The physiological characteristics of Geobacter species appear to explain why they have consistently been found to be the predominant Fe(III)- and Mn(IV)-reducing microorganisms in a variety of sedimentary environments.
Journal ArticleDOI
Sedimentary organic matter preservation: an assessment and speculative synthesis
John I. Hedges,Richard G. Keil +1 more
TL;DR: For example, in a recent paper as discussed by the authors, the authors investigated the mechanisms governing sedimentary organic matter preservation in marine sediments and found that organic preservation in the marine environment is < 0.5% efficient, and that the factors which directly determine preservation vary with depositional regime, but have in common a critical interaction between organic and inorganic materials over locally variable time scales.
Journal ArticleDOI
Microorganisms pumping iron: anaerobic microbial iron oxidation and reduction
TL;DR: Biological iron apportionment has been described as one of the most ancient forms of microbial metabolism on Earth, and as a conceivable extraterrestrial metabolism on other iron-mineral-rich planets such as Mars.
Journal ArticleDOI
Microbial reduction of uranium
TL;DR: In this article, dissimilatory Fe(III)-reducing microorganisms can obtain energy for growth by electron transport to U(VI), which can be much faster than commonly cited abiological mechanisms for reduction.
Book ChapterDOI
Dissimilatory Fe(III) and Mn(IV) reduction.
TL;DR: The ability to oxidize hydrogen with the reduction of Fe(III) is a highly conserved characteristic of hyperthermophilic microorganisms, most notably those in the Geobacteraceae family as mentioned in this paper.
References
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Book ChapterDOI
The Chemistry of Submerged Soils
TL;DR: In this paper, the chemistry of submerged soils is discussed and the role of lake, estuarine, and ocean sediments as reservoirs of nutrients for aquatic plants and as sinks for terrestrial wastes.
Journal ArticleDOI
Novel mode of microbial energy metabolism: organic carbon oxidation coupled to dissimilatory reduction of iron or manganese.
TL;DR: This is the first demonstration that microorganisms can completely oxidize organic compounds with Fe(III) or Mn(IV) as the sole electron acceptor and that oxidation of organic matter coupled to dissimilatory Fe( III), Mn( IV), or Mn (IV) reduction can yield energy for microbial growth.
Biology of anaerobic microorganisms
TL;DR: The Principles and Limits of Anaerobic Degradation: Environmental and Technological Aspects (B. Vogels, et al.) are published.
Journal ArticleDOI
Bacterial Manganese Reduction and Growth with Manganese Oxide as the Sole Electron Acceptor
TL;DR: The characteristics of this reduction are consistent with a biological, and not an indirect chemical, reduction of manganese, which suggest that this bacterium uses manganic oxide as a terminal electron acceptor.
Journal ArticleDOI
Anaerobic production of magnetite by a dissimilatory iron-reducing microorganism
TL;DR: The GS-15 organism as mentioned in this paper is not magnetotactic, but reduces amorphic ferric oxide to extracellular magnetite during the reduction of ferric iron as the terminal electron acceptor for organic matter oxidation.
Related Papers (5)
Novel mode of microbial energy metabolism: organic carbon oxidation coupled to dissimilatory reduction of iron or manganese.
Transformation of toluene and benzene by mixed methanogenic cultures
D Grbić-Galić,Timothy M. Vogel +1 more