Dynamics of hydrocarbon mineralization characterized by isotopic analysis at a jet-fuel-contaminated site in subtropical climate
| Autor: | Hans H. Richnow, Elias Hideo Teramoto, Hung Kiang Chang, Carsten Vogt, Adriana U. Soriano, Luciana Polese, Marcus Paulus Martins Baessa |
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| Přispěvatelé: | Universidade Estadual Paulista (Unesp), Helmholtz Centre for Environmental Research – UFZ, Petrobras Research Center – CENPES |
| Rok vydání: | 2019 |
| Předmět: |
Interphase mass transfer
BTEX mineralization Methanogenesis 0207 environmental engineering Aquifer 02 engineering and technology BTEX 010501 environmental sciences Xylenes 01 natural sciences Methane chemistry.chemical_compound Benzene Derivatives Environmental Chemistry Humans 020701 environmental engineering 0105 earth and related environmental sciences Water Science and Technology Isotope analysis CSIA geography geography.geographical_feature_category Benzene Mineralization (soil science) Isotopic analysis Anoxic waters Hydrocarbons Biodegradation Environmental chemistry Environmental chemistry Environmental science Groundwater Brazil Water Pollutants Chemical Toluene |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 1873-6009 |
| Popis: | Made available in DSpace on 2020-12-12T02:46:11Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-10-01 Fundação para o Desenvolvimento da UNESP (FUNDUNESP) Helmholtz-Zentrum für Umweltforschung 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. São Paulo State University UNESP Environmental Studies Center (CEA) and Basin Studies Laboratory (LEBAC) Helmholtz Centre for Environmental Research – UFZ Petrobras Research Center – CENPES São Paulo State University UNESP Dept. of Applied Geology São Paulo State University UNESP Environmental Studies Center (CEA) and Basin Studies Laboratory (LEBAC) São Paulo State University UNESP Dept. of Applied Geology |
| Databáze: | OpenAIRE |
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