Nitrate addition to groundwater impacted by ethanol-blended fuel accelerates ethanol removal and mitigates the associated metabolic flux dilution and inhibition of BTEX biodegradation

Corseuil, Henry Xavier; Gómez, Diego E.; Schambeck, Cássio Moraes; Ramos, Débora Toledo; Alvarez, Pedro J. J.

doi:10.1016/j.jconhyd.2014.12.004

Cited by 23 publications

(10 citation statements)

References 34 publications

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“…Hypotheses underlying these concerns are that the presence of an easily biodegradable compound such as ethanol will deplete electron acceptors required for attenuation processes (Corseuil et al. , ; Deeb et al. ); create thermodynamic barriers to petroleum degradation (Corseuil et al.…”

Section: Introductionmentioning

confidence: 99%

“…Since the 1990s, questions have been raised as to whether the release of ethanolblended fuel will inhibit the attenuation of other gasoline constituents (Hunt et al 1997 ;Corseuil et al 1998 ;McNab et al 1999 ). Hypotheses underlying these concerns are that the presence of an easily biodegradable compound such as ethanol will deplete electron acceptors required for attenuation processes (Corseuil et al 1998(Corseuil et al , 2015Deeb et al 2002 ); create thermodynamic barriers to petroleum degradation (Corseuil et al 2011 ;Wilson et al 2015 ); and/or repress genes responsible for hydrocarbon transformation (Corseuil et al 1998 ;Gomez and Alvarez 2009 ) . Corseuil et al ( 2011 ) and Wilson et al ( 2015 ), for example, describe how the presence of ethanol or its degradative intermediates (e.g., acetate) could limit the thermodynamic feasibility of benzene degradation.…”

Section: Introductionmentioning

confidence: 99%

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An Empirical Evaluation of the Influence of Ethanol on Natural Attenuation of Gasoline Constituents

O’Reilly¹,

Devine²,

Sihota³

et al. 2016

Groundwater Monitoring Rem

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Since the 1990s, questions have arisen as to whether the release of ethanol‐blended fuel will inhibit natural attenuation of other gasoline constituents in groundwater. This study evaluated the hypothesis that ethanol affects hydrocarbon attenuation and whether the use of ethanol‐blended fuel alters the applicability of monitored natural attenuation (MNA) as an approach for managing risks at fuel‐release sites. Groundwater data from California's GeoTracker database were used to compare attenuation of benzene, toluene, methyl tert‐butyl ether (MTBE), and tert‐butyl alcohol (TBA) at sites with and without detections of ethanol. Excel‐based tools were developed to conduct attenuation evaluations on thousands of wells simultaneously. Ethanol was detected at least once in 4.5% of the wells and 0.6% of the samples of which it was analyzed. The distribution of Mann‐Kendall concentration trend analysis results and first‐order attenuation rates were essentially the same at sites with or without ethanol detections. Median plume lengths were shorter at sites where ethanol had not been detected compared to sites where ethanol was detected (36 vs. 43 m for benzene; 36 vs. 42 m for toluene; 43 vs. 52 m for MTBE; and 44 vs. 59 m for TBA). However, the distribution of plume lengths was similar irrespective of ethanol concentrations, suggesting other factors may influence plume elongation. Finally, while anaerobic ethanol degradation can result in methane generation, the distributions of methane concentrations were the same at sites with and without ethanol detections. These results suggest that the use of ethanol‐blended fuel should not limit the application of MNA at most biodegrading fuel‐release sites.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Empirical Evaluation of the Influence of Ethanol on Natural Attenuation of Gasoline Constituents

O’Reilly¹,

Devine²,

Sihota³

et al. 2016

Groundwater Monitoring Rem

View full text Add to dashboard Cite

show abstract

“…Different parcels of the same field site with the same relatively uniform microbial ecology were polluted and cleaned-up over the last 15 years (Figure 1) [9][10][11][12][13][14][15][16][17] . A range of pollution events was used including pollution by gasoline-ethanol (E10, E25, E85), biodiesel (B100) and dieselbiodiesel blends (B20).…”

Section: Methodsmentioning

confidence: 99%

Back to the Wild: Polluted Site Remediation and Biosphere Resilience

Vogel

2021

Preprint

Self Cite

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Worldwide efforts to depollute environments altered by human industrial activity have begun to produce an ever-increasing number of "clean" sites. "Clean" is defined by local regulatory processes and often responds to low compound concentrations or risk evaluations. Yet, these sites have been critically derailed from their historical biological activity by both the pollution event and the clean-up technology. This work explored the impact of contaminated (and remediated) sites on local microbial ecosystems. Different parcels of the same field site with the same relatively uniform microbial ecology were polluted and cleaned-up over the last 15 years. The statistical evaluation of the perturbation described changes to the local ecosystem that went back to the original baseline microbial composition although the pollution sources and the clean-up technologies affected the rate of return to the pre-disturbed condition. This rate reflected the intensity of the clean-up treatments. The role played by microbial communities on ecosystem maintenance and mitigation of pollution events lays the groundwork for predicting the microbial community responses to perturbations and the ability to reassert themselves. Predictions of ecosystem response to anthropogenic impacts could support decision-making on environmental management strategies for contaminated sites clean-up, depending on the ecosystem services desired to maintain or the risk posed to sensitive receptors.

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“…Os compostos aromáticos, mais precisamente os hidrocarbonetos monoaromáticos, benzeno, tolueno, etilbenzeno e xilenos, são denominados BTEX (MARTINS, 2015). No caso da gasolina brasileira, há a combinação BTEX-Etanol, uma vez que a mesma possui aproximadamente 24% de Etanol em sua constituição, fator dificultador dos processos de biodegradação (CORSEUIL et al, 2015).…”

Section: Hidrocarbonetos De Petróleounclassified

Estudo de parâmetros de transporte de contaminantes no solo

Oliveira¹,

Martins²,

Almeida³

et al. 2022

Congresso Brasileiro De Mecânica Dos Solos E Engenharia Geotécnica

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Nitrate addition to groundwater impacted by ethanol-blended fuel accelerates ethanol removal and mitigates the associated metabolic flux dilution and inhibition of BTEX biodegradation

Abstract: HIGHLIGHTS:• The attenuation of two controlled ethanol-blended fuel releases were monitored• One release was biostimulated with nitrate as terminal electron acceptor• This accelerated removal of ethanol and its inhibitory effect on BTEX degradation

Cited by 23 publications

References 34 publications

An Empirical Evaluation of the Influence of Ethanol on Natural Attenuation of Gasoline Constituents

An Empirical Evaluation of the Influence of Ethanol on Natural Attenuation of Gasoline Constituents

Back to the Wild: Polluted Site Remediation and Biosphere Resilience

Estudo de parâmetros de transporte de contaminantes no solo

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