Bacterial community changes in TCE biodegradation detected in microcosm experiments

Révész, Sára; Sipos, Rita; Kende, Anikó; Rikker, Tamás; Romsics, Csaba; Mészáros, Éva; Mohr, Anita; Táncsics, Andräs; Màrialigeti, Károly

doi:10.1016/j.ibiod.2006.06.018

Cited by 35 publications

(19 citation statements)

References 26 publications

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“…The absolute quantification of RDase proteins during the dechlorination process is performed by using nano-liquid chromatography-tandem mass spectrometry in two PCE/TCE degradation consortia. Within 5 selected RDases, only the quantities of PceA and TceA are detectable [72]. The regulation on the expression of rdh genes during dechlorination reaction or steady state is not clear.…”

Section: Genomic Structure and Transcription Regulation Of Reductive mentioning

confidence: 99%

Microbial Degradation of Some Halogenated Compounds: Biochemical and Molecular Features

Peng¹,

Shih²

2013

Biodegradation of Hazardous and Special Products

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Section: Genomic Structure and Transcription Regulation Of Reductive mentioning

confidence: 99%

Microbial Degradation of Some Halogenated Compounds: Biochemical and Molecular Features

Peng¹,

Shih²

2013

Biodegradation of Hazardous and Special Products

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“…25,51,52 The reductive dehalogenase, vcrA, of Dehalococcoides sp. is responsible for the complete dechlorination of TCE to ethane.…”

Section: Rt-pcr and Dgge Analysismentioning

confidence: 99%

A novel three-stage treatment train for the remediation of trichloroethylene-contaminated groundwater

et al. 2016

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This study used a novel three-stage treatment train that was composed of chemical oxidation, anaerobic bioremediation and a passive reactive barrier (PRB) to remediate trichloroethylene (TCE)-contaminated groundwater. Batch oxidation and biodegradation experiments and a continuous column study were used to evaluate the compatibility of different technologies and the feasibility of the removal of TCE by the treatment train. The results of batch experiments show that high concentrations of TCE (50 mg L À1 ) were removed completely by the addition of 5000 to 50 000 mg L À1 persulfate during 24 to 96 h of reaction. Ferrous ion-activated persulfate may result in a residue of TCE due to the rapid consumption of persulfate by ferrous ions. Significant inhibition of soil bacteria was observed upon the addition of persulfate in concentrations greater than 20 000 mg L À1 . Both low pH and the oxidative stress of persulfate were responsible for the adverse effect on indigenous microorganisms. The results of a microcosm study reveal that the presence of high concentrations of sulfate (up to 50 000 mg L À1 ) had no adverse effect on TCE removal. Sulfate significantly enhanced the dechlorination of vinyl chloride via sulfate reduction, which demonstrates that sulfate produced from persulfate oxidation could be utilized by indigenous bacteria to achieve the complete dechlorination of TCE. The addition of 5000 to 50 000 mg L À1 bioremediation reagent improved the degradation of TCE. Dechlorinating bacteria, Dehalococcoides, and the reductive dehalogenase, vcrA, of Dehalococcoides were detected during TCE biodegradation. The results of a column study show that the proposed treatment train removed TCE and its byproducts effectively and there was no problem with the connection of chemical oxidation and anaerobic bioremediation in the novel treatment train technology. The use of 10 000 mg L À1 of persulfate and the bioremediation reagent, and the PRB that can continuously release 6000 mg L À1 of persulfate are suggested to operate the treatment train. The proposed treatment scheme will provide a more effective alternative for the remediation of contaminated sites in the future.

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“…in the presence of another organic compound representing a primary carbon and energy source for the microorganisms [18]. Much attention had been paid to study various microorganisms and multiple substrates such as toluene, cresol or phenol to co-metabolize TCE pollutants from contaminated air streams [18][19][20][21][22][23][24][25][26][27][28][29][30][31]. It has also been reported that in anaerobic environments, chlorinated solvents can be used as electron acceptors by microorganisms in the presence of a favorable electron donor.…”

Section: Referencementioning

confidence: 99%

“…However, VC accumulation was observed in the presence of slightly dissolved oxygen 0.7-0.8 mg m −3 [30,31]. Slow consumption rates and handing capacities remain bottlenecks to both TCE and substrate biodegradation due to the toxic effect of TCE intermediates as well as the competitive inhibition by growth substrates [21][22][23][24][25]. A maximum elimination capacity of TCE 28 g m −3 h −1 was observed by Kan and Deshusses [28] in a foamed emulsion bioreactor by alternative feeding of TCE and toluene to circumvent the competitive inhibition using Burkholderia cepacia G4.…”

Section: Referencementioning

confidence: 99%

Cometabolic degradation of trichloroethylene in a hollow fiber membrane reactor with toluene as a substrate

Zhao

Liu

et al. 2011

Journal of Membrane Science

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Bacterial community changes in TCE biodegradation detected in microcosm experiments

Cited by 35 publications

References 26 publications

Microbial Degradation of Some Halogenated Compounds: Biochemical and Molecular Features

Microbial Degradation of Some Halogenated Compounds: Biochemical and Molecular Features

A novel three-stage treatment train for the remediation of trichloroethylene-contaminated groundwater

Cometabolic degradation of trichloroethylene in a hollow fiber membrane reactor with toluene as a substrate

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