Microbial Degradation of Nitrogen, Oxygen and Sulfur Heterocyclic Compounds Under Anaerobic Conditions: Studies With Aquifer Samples

Kuhn, Elmar P.; Suflita, Joseph M.

doi:10.1897/1552-8618(1989)8[1149:mdonoa]2.0.co;2

Cited by 19 publications

(23 citation statements)

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“…Nocardia (soil bacterium) was capable of using atrazine as the sole carbon and nitrogen source. It transformed atrazine into dealkylated and deaminated metabolites (Giardina et al, 1982;Kuhn and Suflita, 1989;Vaishampayan et al, 2007). In various biodegradation studies, dealkylation of both side chains was frequently observed over dechlorination by hydroxylation.…”

Section: Biodegradation Of Atrazinementioning

confidence: 99%

Untitled

2017

RJLBPCS

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ABSTRACT:Increasing human population is putting enormous pressure on food supply and agriculture. To increase crop production, pesticides are used intensively. Atrazine (herbicide) which has proved economical in case of maize and sorghum for yield increase and price reduction for farmers. However, extensive use of atrazine in agriculture resulted in pollution and adverse effects on the environment.There is need to tackle atrazine contamination. This review explores the way for atrazine remediation.

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Section: Biodegradation Of Atrazinementioning

confidence: 99%

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2017

RJLBPCS

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“…There are no reports of anaerobic degradation of benzofuran, whereas furan was degraded in a methanogenic aquifer sample (Kuhn & Suflita 1989).…”

Section: Introductionmentioning

confidence: 99%

“…This study focuses on the biological degradation ofheterocyclic compounds, which constitute approximately 5% of creosote (Muelter et al 1989). However, due to their relatively high water solubility (Kuhn & Suflita 1989) and thus weak sorption they can amount to 35-40% of the water soluble fraction of creosote. Heterocyclic compounds are therefore potential ground water contaminants.…”

Section: Introductionmentioning

confidence: 99%

Effects of electron acceptors, reducing agents, and toxic metabolites on anaerobic degradation of heterocyclic compounds

1996

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Degradation of four heterocyclic compounds was examined under nitrate-reducing, sulphate-reducing and methanogenic conditions. Soil samples from a creosote-polluted site in Denmark were used as inoculum. Indole and quinoline were degraded under all redox conditions with the highest degradation rates obtained under sulphatereducing conditions. Benzothiophene and benzofuran were not degraded during the observation period of 100 days under any of the redox conditions. Indole and quinoline degrading cultures could be repeatedly transferred under all redox conditions, except for degradation of quinoline under sulphate-reducing conditions which was inhibited by sulphide at concentrations above 0.8 mM. Degradation of quinoline under methanogenic conditions was also inhibited by 3.2 mM sulphide used as a reducing agent, but sulphide had no inhibitory effect on the degradation of indole in methanogenic and sulphate-reducing soil slurries.

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“…In practice, often two or more independent approaches are combined (Smets and Pritchard, 2003;Watanabe and Hamamuray, 2003), among these are evidence of concentration decrease of contaminants over time and distance (Wiedemeier et al, 1999), enrichment of heavy stable isotopes in the remaining fraction of organic contaminants (Hunkeler et al, 2002;Meckenstock et al, 2002;Sherwood Lollar et al, 1999), radiotracer studies (Bianchin et al, 2006;Conrad et al, 1997), succession of redox zones in the field (Kuhn and Suflita, 1989;Vroblesky and Chapelle, 1994); accumulation of signature metabolites (Beller, 2002;Elshahed et al, 2001), investigation of the intrinsic microbial biodegradation potential in microcosm studies e in parts with 14 C-labeled substrates e (Aelion and Bradley, 1991;Ambrosoli et al, 2005;Lovley, 2001); characterization of the bacterial community by molecular techniques (Amann et al, 1995;Bakermans et al, 2002), tracing 13 C in fatty acid profiles of bacteria (Geyer et al, 2005), and detection of bacterial enzymes (Hanson et al, 1999;Heinaru et al, 2005;Hendrickx et al, 2006;Löffler et al, 2000). Each of these methods has its advantages and limitations, and therefore it is advisable to base investigations on several approaches, even more when dealing with complex field sites.…”

Section: Introductionmentioning

confidence: 99%

Evidence for in situ degradation of mono-and polyaromatic hydrocarbons in alluvial sediments based on microcosm experiments with 13C-labeled contaminants

Morasch

Höhener

Hunkeler

2007

Environmental Pollution

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A method based on 13 C-labeled substrates was developed to determine the intrinsic biodegradation potential of aromatic pollutants under oxic and under anoxic conditions. AbstractA microcosm study was conducted to investigate the degradation of mono-and polyaromatic hydrocarbons under in situ-like conditions using alluvial sediments from the site of a former cokery. Benzene, naphthalene, or acenaphthene were added to the sediments as 13 C-labeled substrates. Based on the evolution of 13 C-CO 2 determined by gas chromatography isotope-ratio mass spectrometry (GC-IRMS) it was possible to prove mineralization of the compound of interest in the presence of other unknown organic substances of the sediment material. This new approach was suitable to give evidence for the intrinsic biodegradation of benzene, naphthalene, and acenaphthene under oxic and also under anoxic conditions, due to the high sensitivity and reproducibility of 13 C/ 12 C stable isotope analysis. This semi-quantitative method can be used to screen for biodegradation of any slowly degrading, strongly sorbing compound in long-term experiments.

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Microbial Degradation of Nitrogen, Oxygen and Sulfur Heterocyclic Compounds Under Anaerobic Conditions: Studies With Aquifer Samples

Cited by 19 publications

References 0 publications

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Effects of electron acceptors, reducing agents, and toxic metabolites on anaerobic degradation of heterocyclic compounds

Evidence for in situ degradation of mono-and polyaromatic hydrocarbons in alluvial sediments based on microcosm experiments with 13C-labeled contaminants

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