Dynamics of hydrocarbon mineralization characterized by isotopic analysis at a jet-fuel-contaminated site in subtropical climate

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dc.contributor.authorTeramoto, Elias Hideo [UNESP]
dc.contributor.authorVogt, Carsten
dc.contributor.authorMartins Baessa, Marcus Paulus
dc.contributor.authorPolese, Luciana [UNESP]
dc.contributor.authorSoriano, Adriana Ururahy
dc.contributor.authorChang, Hung Kiang [UNESP]
dc.contributor.authorRichnow, Hans Hermann
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionHelmholtz Centre for Environmental Research – UFZ
dc.contributor.institutionPetrobras Research Center – CENPES
dc.date.accessioned2020-12-12T02:46:11Z
dc.date.available2020-12-12T02:46:11Z
dc.date.issued2020-10-01
dc.description.abstractRelease of benzene, toluene, ethylbenzene, and xylene (BTEX) as components of the light non-aqueous phase liquids (LNAPL) contaminates soil and groundwater. Assessing the mechanisms of degradation and mineralization of BTEX in groundwater helps understand the migration of the dissolved plume, enabling the reduction of risks to humans. Here, we studied the fate of ethylbezene, m,p-xylenes and o-xylenes and the accompanying formation of methane in a Cenozoic lateritic aquifer in Brazil by compound-specific carbon stable isotope analysis (CSIA), to gain insights into the complex dynamics of release and biodegradation of BTEX in the LNAPL source zone. The enrichment of ∂13C in aromatic compounds dissolved in groundwater compared to the corresponding compounds in LNAPL indicate that CSIA can provide valuable information regarding biodegradation. The isotopic analysis of methane provides direct indication of oxidation mediated by aquifer oxygenation. The ∂13C-CO2 values indicate methanogenesis prevailing at the border and aerobic biodegradation in the center of the LNAPL source zone. Importantly, the isotopic results allowed major improvements in the previously developed conceptual model, supporting the existence of oxic and anoxic environments within the LNAPL source zone.en
dc.description.affiliationSão Paulo State University UNESP Environmental Studies Center (CEA) and Basin Studies Laboratory (LEBAC)
dc.description.affiliationHelmholtz Centre for Environmental Research – UFZ
dc.description.affiliationPetrobras Research Center – CENPES
dc.description.affiliationSão Paulo State University UNESP Dept. of Applied Geology
dc.description.affiliationUnespSão Paulo State University UNESP Environmental Studies Center (CEA) and Basin Studies Laboratory (LEBAC)
dc.description.affiliationUnespSão Paulo State University UNESP Dept. of Applied Geology
dc.description.sponsorshipFundação para o Desenvolvimento da UNESP (FUNDUNESP)
dc.description.sponsorshipHelmholtz-Zentrum für Umweltforschung
dc.identifierhttp://dx.doi.org/10.1016/j.jconhyd.2020.103684
dc.identifier.citationJournal of Contaminant Hydrology, v. 234.
dc.identifier.doi10.1016/j.jconhyd.2020.103684
dc.identifier.issn1873-6009
dc.identifier.issn0169-7722
dc.identifier.lattes1989662459244838
dc.identifier.scopus2-s2.0-85088254796
dc.identifier.urihttp://hdl.handle.net/11449/201958
dc.language.isoeng
dc.relation.ispartofJournal of Contaminant Hydrology
dc.sourceScopus
dc.subjectBTEX mineralization
dc.subjectCSIA
dc.subjectInterphase mass transfer
dc.subjectIsotopic analysis
dc.subjectMethanogenesis
dc.titleDynamics of hydrocarbon mineralization characterized by isotopic analysis at a jet-fuel-contaminated site in subtropical climateen
dc.typeArtigo
unesp.author.lattes1989662459244838[6]

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