Enhancing Phenanthrene Biomineralization in a Polluted Soil Using Gaseous Toluene as a Cosubstrate.

Ortíz, Irmene; Auria, Richard; Sigoillot, Jean‐Claude; Revah, Sergio

doi:10.1021/es030597t

Cited by 4 publications

(20 citation statements)

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“…The results were consistent to those previously reported [16], where the presence of toluene favored the biodegradation of phenanthrene and intermediates and mineralization increased from 39 to 86%. Several hypotheses have been suggested to explain the effect of toluene including increased biomass production and the activation of microorganisms or enzymes that improve the consumption rate of both the pollutants and their intermediates.…”

Section: Hydrocarbon Degradationsupporting

confidence: 93%

“…This behavior was consistent with the hypothesis that toluene favored the improved utilization of the formed intermediates as in Soil A. In our previous work on phenanthrene biodegradation, a mass balance of labeled-carbon ( 14 C) demonstrated the positive effect of toluene in the biodegradation and mineralization of soluble intermediates [16].…”

Section: Mineralization Of Hydrocarbons In Columns Experimentssupporting

confidence: 90%

“…They were performed in the experimental device previously described [16] and consisted in a ventilated temperature controlled chamber at 30 ± 2 • C. An air stream was provided by a compressor and controlled with two mass flow meters (Mathesson, USA, mod. 8141; Aalborg, USA, mod.…”

Section: Column Experimentsmentioning

confidence: 99%

“…For environmental applications, it has been reported that the addition of a second organic substrate can substantially alter the degradation kinetics of organic compounds in soil [13][14][15]. In a previous work on phenanthrene biodegradation in a model soil, it was demonstrated that the addition of toluene as gaseous cosubstrate enhanced the degradation rate and favored the mineralization of intermediates such as phthalic acid [16]. In a parallel work with petroleum hydrocarbon-polluted soils, various compounds including toluene, ethanol, glucose, pentane and hexadecane, were assayed in batch slurries to evaluate their effect on the degradation of total petroleum hydrocarbons (TPHs) [17].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of toluene as gaseous cosubstrate in bioremediation of hydrocarbon-polluted soil

Ortíz

Velasco²,

Revah

2006

Journal of Hazardous Materials

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Section: Hydrocarbon Degradationsupporting

confidence: 93%

Section: Mineralization Of Hydrocarbons In Columns Experimentssupporting

confidence: 90%

Section: Column Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of toluene as gaseous cosubstrate in bioremediation of hydrocarbon-polluted soil

Ortíz

Velasco²,

Revah

2006

Journal of Hazardous Materials

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“…Previous studies have found evidence of enhanced biodegradation rates as well as decreased biodegradation rates for PAHs present in mixtures [3–15]. These studies provided valuable insights regarding the significance for potential substrate interactions in the biodegradation of mixtures of PAHs, but when examined collectively, no clear pattern to the substrate interactions was found.…”

Section: Introductionmentioning

confidence: 99%

Multisubstrate biodegradation kinetics for binary and complex mixtures of polycyclic aromatic hydrocarbons

Knightes

Peters

2006

Enviro Toxic and Chemistry

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Biodegradation kinetics were studied for binary and complex mixtures of nine polycyclic aromatic hydrocarbons (PAHs): Naphthalene, 1-methylnaphthalene, 2-methylnaphthalene, 2-ethylnaphthalene, phenanthrene, anthracene, pyrene, fluorene, and fluoranthene. Discrepancies between the observed biodegradation rates and those predicted by a sole-substrate model indicate that significant substrate interactions occurred in both the binary and complex-mixture experiments. For all compounds except naphthalene, biodegradation was enhanced. The observations were compared to predictions from two multisubstrate biodegradation kinetic models: One that accounts for competitive inhibition, and one that does not. Both models are fully predictive in that parameters had been determined from an independent set of sole-substrate experiments. In the binary experiments, the major multisubstrate effect was biomass enhancement as a result of growth on naphthalene. Substrate interactions were orders of magnitude larger for most compounds in the complex mixtures, but significant competitive inhibition effects counteracted some of the biomass enhancement effect. The present study has demonstrated that the sole-substrate model is inadequate to describe multisubstrate biodegradation kinetics for a broad range of PAH mixtures. Whereas the multisubstrate model without inhibition did an adequate job of predicting the observed effects in some cases, we advocate the use of the multisubstrate model with inhibition for similar modeling efforts in light of the evidence that the model was correct more often than not. Theory supports its use because of the common enzyme pathways for biodegradation of PAHs.

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Modelling phenanthrene biodegradation and mineralisation in polluted soil using toluene as gaseous cosubstrate

Ortíz

Revah

2008

J of Chemical Tech & Biotech

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BACKGROUND: Mathematical models describing the physical, chemical and biological processes that take place in bioremediation are necessary to design and optimise these technologies. This work models the effect of toluene as a gaseous cosubstrate in the degradation of phenanthrene in soil, considering the consumption of pollutants, the production of intermediate degradation compounds and mineralisation. The proposed model consists of a set of sequential reactions to convert phenanthrene to carbon dioxide and biomass with the production and consumption of phthalic acid, which is the main intermediate metabolite.

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Enhancing Phenanthrene Biomineralization in a Polluted Soil Using Gaseous Toluene as a Cosubstrate.

Cited by 4 publications

References 0 publications

Effect of toluene as gaseous cosubstrate in bioremediation of hydrocarbon-polluted soil

Effect of toluene as gaseous cosubstrate in bioremediation of hydrocarbon-polluted soil

Multisubstrate biodegradation kinetics for binary and complex mixtures of polycyclic aromatic hydrocarbons

Modelling phenanthrene biodegradation and mineralisation in polluted soil using toluene as gaseous cosubstrate

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