Dynamics of hydrocarbon mineralization characterized by isotopic analysis at a jet-fuel-contaminated site in subtropical climate
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.jconhyd.2020.103684 http://hdl.handle.net/11449/201958 |
Resumo: | Release 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. |
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Dynamics of hydrocarbon mineralization characterized by isotopic analysis at a jet-fuel-contaminated site in subtropical climateBTEX mineralizationCSIAInterphase mass transferIsotopic analysisMethanogenesisRelease 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.Fundação para o Desenvolvimento da UNESP (FUNDUNESP)Helmholtz-Zentrum für UmweltforschungSão Paulo State University UNESP Environmental Studies Center (CEA) and Basin Studies Laboratory (LEBAC)Helmholtz Centre for Environmental Research – UFZPetrobras Research Center – CENPESSão Paulo State University UNESP Dept. of Applied GeologySão Paulo State University UNESP Environmental Studies Center (CEA) and Basin Studies Laboratory (LEBAC)São Paulo State University UNESP Dept. of Applied GeologyUniversidade Estadual Paulista (Unesp)Helmholtz Centre for Environmental Research – UFZPetrobras Research Center – CENPESTeramoto, Elias Hideo [UNESP]Vogt, CarstenMartins Baessa, Marcus PaulusPolese, Luciana [UNESP]Soriano, Adriana UrurahyChang, Hung Kiang [UNESP]Richnow, Hans Hermann2020-12-12T02:46:11Z2020-12-12T02:46:11Z2020-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.jconhyd.2020.103684Journal of Contaminant Hydrology, v. 234.1873-60090169-7722http://hdl.handle.net/11449/20195810.1016/j.jconhyd.2020.1036842-s2.0-850882547961989662459244838Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Contaminant Hydrologyinfo:eu-repo/semantics/openAccess2021-10-23T03:21:50Zoai:repositorio.unesp.br:11449/201958Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:32:53.963538Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Dynamics of hydrocarbon mineralization characterized by isotopic analysis at a jet-fuel-contaminated site in subtropical climate |
title |
Dynamics of hydrocarbon mineralization characterized by isotopic analysis at a jet-fuel-contaminated site in subtropical climate |
spellingShingle |
Dynamics of hydrocarbon mineralization characterized by isotopic analysis at a jet-fuel-contaminated site in subtropical climate Teramoto, Elias Hideo [UNESP] BTEX mineralization CSIA Interphase mass transfer Isotopic analysis Methanogenesis |
title_short |
Dynamics of hydrocarbon mineralization characterized by isotopic analysis at a jet-fuel-contaminated site in subtropical climate |
title_full |
Dynamics of hydrocarbon mineralization characterized by isotopic analysis at a jet-fuel-contaminated site in subtropical climate |
title_fullStr |
Dynamics of hydrocarbon mineralization characterized by isotopic analysis at a jet-fuel-contaminated site in subtropical climate |
title_full_unstemmed |
Dynamics of hydrocarbon mineralization characterized by isotopic analysis at a jet-fuel-contaminated site in subtropical climate |
title_sort |
Dynamics of hydrocarbon mineralization characterized by isotopic analysis at a jet-fuel-contaminated site in subtropical climate |
author |
Teramoto, Elias Hideo [UNESP] |
author_facet |
Teramoto, Elias Hideo [UNESP] Vogt, Carsten Martins Baessa, Marcus Paulus Polese, Luciana [UNESP] Soriano, Adriana Ururahy Chang, Hung Kiang [UNESP] Richnow, Hans Hermann |
author_role |
author |
author2 |
Vogt, Carsten Martins Baessa, Marcus Paulus Polese, Luciana [UNESP] Soriano, Adriana Ururahy Chang, Hung Kiang [UNESP] Richnow, Hans Hermann |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Helmholtz Centre for Environmental Research – UFZ Petrobras Research Center – CENPES |
dc.contributor.author.fl_str_mv |
Teramoto, Elias Hideo [UNESP] Vogt, Carsten Martins Baessa, Marcus Paulus Polese, Luciana [UNESP] Soriano, Adriana Ururahy Chang, Hung Kiang [UNESP] Richnow, Hans Hermann |
dc.subject.por.fl_str_mv |
BTEX mineralization CSIA Interphase mass transfer Isotopic analysis Methanogenesis |
topic |
BTEX mineralization CSIA Interphase mass transfer Isotopic analysis Methanogenesis |
description |
Release 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. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-12T02:46:11Z 2020-12-12T02:46:11Z 2020-10-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.jconhyd.2020.103684 Journal of Contaminant Hydrology, v. 234. 1873-6009 0169-7722 http://hdl.handle.net/11449/201958 10.1016/j.jconhyd.2020.103684 2-s2.0-85088254796 1989662459244838 |
url |
http://dx.doi.org/10.1016/j.jconhyd.2020.103684 http://hdl.handle.net/11449/201958 |
identifier_str_mv |
Journal of Contaminant Hydrology, v. 234. 1873-6009 0169-7722 10.1016/j.jconhyd.2020.103684 2-s2.0-85088254796 1989662459244838 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Contaminant Hydrology |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129332736950272 |