Microbial Metabolism of Benzene and the Oxidation of Ferrous Iron under Anaerobic Conditions: Implications for Bioremediation

Caldwell, Matthew E.; Tanner, Ralph S.; Suflita, Joseph M.

doi:10.1006/anae.1999.0193

Cited by 39 publications

(26 citation statements)

References 59 publications

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“…4 ( 1.7‰ for hydrogen isotopes (Table 1). While two of the benzenes have similar δ 13 C values, each of them has a distinct pair of δ 13 C and δ 2 H values.…”

Section: Resultsmentioning

confidence: 99%

“…The limited spreading of petroleum hydrocarbon compounds is usually attributed to the occurrence of biodegradation. Numerous laboratory studies have confirmed that BTEX compounds can be biodegraded under aerobic (3) and anaerobic conditions (4)(5)(6). However, it is often difficult to prove biodegradation at field sites since concentration changes can also be due to physical processes such as dispersion and sorption.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hydrogen and Carbon Isotope Fractionation during Aerobic Biodegradation of Benzene

Hunkeler

Andersen

Aravena

et al. 2001

Environ. Sci. Technol.

163

112

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The main aim of the study was to evaluate hydrogen and carbon isotope fractionation during biodegradation of benzene as a possible tool to trace the process in contaminated environments. Aerobic biodegradation of benzene by two bacterial isolates, Acinetobacter sp. and Burkholderia sp., was accompanied by significant hydrogen and carbon isotope fractionation with hydrogen isotope enrichment factors of -12.8 ( 0.7‰ and -11.2 ( 1.8‰, respectively, and average carbon isotope enrichment factors of -1.46 ( 0.06‰ and -3.53 ( 0.26‰, respectively. Inorganic carbon produced by Acinetobacter sp. was depleted in 13 C by 3.6-6.2‰ as compared to the initial δ 13 C of benzene, while the produced biomass was enriched in 13 C by 3.8‰. The secondary aim was to determine isotope ratios of benzenes from different manufacturers with regard to the use of isotopes for source differentiation. While two of the four analyzed benzenes had similar δ 13 C values, each of them had a distinct δ 2 H-δ 13 C pair and δ 2 H values spread over a range of 66.5‰. Thus, combined analyses of hydrogen and carbon isotopes may be a more promising approach to trace sources and/or biodegradation of benzene than measuring carbon isotopes only.

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“…4 ( 1.7‰ for hydrogen isotopes (Table 1). While two of the benzenes have similar δ 13 C values, each of them has a distinct pair of δ 13 C and δ 2 H values.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrogen and Carbon Isotope Fractionation during Aerobic Biodegradation of Benzene

Hunkeler

Andersen

Aravena

et al. 2001

Environ. Sci. Technol.

163

112

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“…Caldwell et al [1999] suggested, instead, that these sporadic observations are due to an indirect effect of nitrate-dependent oxidation of Fe(II) to Fe(III) in some anaerobic environments containing both nitrate and Fe(II), generating a more suitable TEA for benzene degradation. Recently, two pure cultures identified as Dechloromonas spp.…”

Section: Benzenementioning

confidence: 99%

Anaerobic Biodegradation of Aromatic Hydrocarbons: Pathways and Prospects

Foght¹

2008

Microb Physiol

271

151

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Aromatic hydrocarbons contaminate many environments worldwide, and their removal often relies on microbial bioremediation. Whereas aerobic biodegradation has been well studied for decades, anaerobic hydrocarbon biodegradation is a nascent field undergoing rapid shifts in concept and scope. This review presents known metabolic pathways used by microbes to degrade aromatic hydrocarbons using various terminal electron acceptors; an outline of the few catabolic genes and enzymes currently characterized; and speculation about current and potential applications for anaerobic degradation of aromatic hydrocarbons.

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“…Previous studies have demonstrated that anoxic Fe(II) oxidation is mediated by some anoxygenic phototrophs (14,25,53) as well as by various nitrate-or perchlorate-respiring organisms (3,5,8,45,52). Microbial communities capable of nitrate-dependent Fe(II) oxidation have been observed in a variety of freshwater and saline environments (3,6,15,19,23,24,26,39,42,46,52). However, the microorganisms sustaining this metabolism in situ are virtually unknown.…”

mentioning

confidence: 99%

Anaerobic Nitrate-Dependent Iron(II) Bio-Oxidation by a Novel Lithoautotrophic Betaproteobacterium, Strain 2002

Weber

Pollock

Cole

et al. 2006

Appl Environ Microbiol

209

161

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Microbial nitrate-dependent Fe(II) oxidation is known to contribute to iron biogeochemical cycling; however, the microorganisms responsible are virtually unknown. In an effort to elucidate this microbial metabolic process in the context of an environmental system, a 14-cm sediment core was collected from a freshwater lake and geochemically characterized concurrently with the enumeration of the nitrate-dependent Fe (

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Microbial Metabolism of Benzene and the Oxidation of Ferrous Iron under Anaerobic Conditions: Implications for Bioremediation

Cited by 39 publications

References 59 publications

Hydrogen and Carbon Isotope Fractionation during Aerobic Biodegradation of Benzene

Hydrogen and Carbon Isotope Fractionation during Aerobic Biodegradation of Benzene

Anaerobic Biodegradation of Aromatic Hydrocarbons: Pathways and Prospects

Anaerobic Nitrate-Dependent Iron(II) Bio-Oxidation by a Novel Lithoautotrophic Betaproteobacterium, Strain 2002

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