Biodegradation of benzene, toluene, ethylbenzene and xylenes in gas-condensate-contaminated ground-water

Morgan, Phil G.; Lewis, Stephen T.; Watkinson, R. J.

doi:10.1016/0269-7491(93)90115-5

Cited by 67 publications

(41 citation statements)

References 27 publications

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“…No entanto, o decaimento na concentração do benzeno foi de apenas 35%. Embora haja muita controvérsia acerca da biodegradação de benzeno sob condições anaeró-bicas, em presença de nitrato, no presente es- tudo isto foi observado, ou seja, o benzeno é recalcitrante (Borden et al, 1995;Hutchins, 1991a;Morgan et al, 1993). Conforme os dados da Tabela 2, realizados para confirmar uma possível atenuação natural, as águas subterrâneas são ácidas, com pH variando entre 4,0 e 6,0.…”

Section: Resultsunclassified

“…Os teores de Fe(II), muito baixos (< 0,2mg.L -1 ), indicam que nesses poços provavelmente há ausência de Fe(III). Na Tabela 3, os potenciais químicos relativamente altos indicam um ambiente oxidante, que também é reforçado pelos teores de nitrato e oxigênio dissolvido que, além de serem fortes oxidantes, favorecem a atenuação natural, também observado por Morgan (1993). Na Figura 1, pode-se constatar que os pontos 01 e 02, localizados dentro da pluma de contami- …”

Section: Resultsunclassified

“…A determinação de BTEX foi realizada por cromatografia gasosa com sistema purge and trap, utilizando-se um cromatógrafo DFI/DIC -HP 5890 II, seguindo as metodologias 502.2, 503.1, 602 da EPA (Morgan et al, 1993). No sistema purge and trap (P&T), uma alíquota de 5,0mL da amostra de água é extraída e concentrada.…”

Section: Materiais E Métodosunclassified

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Estudo da contaminação de poços rasos por combustíveis orgânicos e possíveis conseqüências para a saúde pública no Município de Itaguaí, Rio de Janeiro, Brasil

et al. 2002

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Section: Resultsunclassified

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Estudo da contaminação de poços rasos por combustíveis orgânicos e possíveis conseqüências para a saúde pública no Município de Itaguaí, Rio de Janeiro, Brasil

et al. 2002

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“…Attempts for BTX removal using different electron acceptors such as nitrate (Burland & Edwards, 1999;Major et al, 1988;Martinez et al, 2007;Peña-Calva et al, 2004b;Weelink et al, 2010), sulfate (Craig et al, 1996;Feris et al, 2008) and CO 2 (Corseuil et al, 1998;Lovley, 2000;Morgan et al, 1993;Weelink 2010) have been conducted. There is scarce information describing interaction of BTX mixtures under anaerobic conditions.…”

mentioning

confidence: 99%

Simultaneous Elimination of Carbon and Nitrogen Compounds of Petrochemical Effluents by Nitrification and Denitrification

Texier¹,

Zepeda²,

Gómez³

et al. 2012

Petrochemicals

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“…C5+ components are used in industrial processes, singly or in mixtures [2,3]. Many are also components of gasoline [4,5]. Large-scale, wide-spread use of C5+ and its components increases the risk of their accidental release during transport or handling at industrial sites.…”

Section: Introductionmentioning

confidence: 99%

Microbial community composition at an ethane pyrolysis plant site at different hydrocarbon inputs

Greene

2002

FEMS Microbiology Ecology

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Aerobic biodegradation of C5+, a contaminant at ethane pyrolysis plants, consisting mainly of benzene, toluene, xylene, styrene, dicyclopentadiene (DCPD) and naphthalene, removes all components except the recalcitrant DCPD. The number (N) of total culturable heterotrophs in contaminated and uncontaminated soil cultures increased up to three orders of magnitude upon incubation with C5+, or with C5+ components other than DCPD. Exposure of soil cultures to C5+ for 2^4 weeks and to DCPD for a further 43^52 weeks caused N to increase 3, then decrease two orders of magnitude. Early microbial communities (up to 13 weeks) were dominated by Pseudomonas spp. and late communities (40^60 weeks) by Alcaligenes spp., especially in contaminated soil cultures. The hydrocarbon used (C5+ or one of its components) was a less important determinant of community composition than incubation time. Rates of aerobic degradation of benzene, toluene and styrene by the soil cultures were greater for the pure components than for the components in the C5+ mixture. The difference was less pronounced for m-xylene. The exception, naphthalene, was degraded more slowly when in pure form. However, the combined rate of all C5+ components in the mixture was similar to the highest rates observed for pure components. We conclude that soil communities efficiently metabolize a C5+ mixture or its pure components and that the community composition is hardly affected by different hydrocarbon inputs. Consequently, determination of the community composition does not provide a good indicator of the hydrocarbons being metabolized. ß

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Biodegradation of benzene, toluene, ethylbenzene and xylenes in gas-condensate-contaminated ground-water

Cited by 67 publications

References 27 publications

Estudo da contaminação de poços rasos por combustíveis orgânicos e possíveis conseqüências para a saúde pública no Município de Itaguaí, Rio de Janeiro, Brasil

Estudo da contaminação de poços rasos por combustíveis orgânicos e possíveis conseqüências para a saúde pública no Município de Itaguaí, Rio de Janeiro, Brasil

Simultaneous Elimination of Carbon and Nitrogen Compounds of Petrochemical Effluents by Nitrification and Denitrification

Microbial community composition at an ethane pyrolysis plant site at different hydrocarbon inputs

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