Microbial processes influencing the transport,fate and groundwater impacts of fuel ethanol releases
Institution:
1. Department of Civil and Environmental Engineering, Rice University, 6100 Main St., Houston, TX 77005, USA;2. Department of Civil and Environmental Engineering, University of Houston, 4800 Calhoun Rd., Houston, TX 77204-4003, USA;1. School of Bioresources and Technology, King Mongkut''s University of Technology Thonburi, Bangkok, Thailand;2. Department of Civil and Environmental Engineering, University of Washington, Seattle, WA, USA;1. Department of Microbiology, Federal University of Rio Grande do Sul, Sarmento Leite, 500, CEP 90050-170, Porto Alegre, RS, Brazil;2. Department of Engineering, Federal University of Pelotas, Benjamin Constant, 989, CEP 96010-020, Pelotas, RS, Brazil;3. Department of Inorganic Chemistry, Federal University of Rio Grande do Sul, Bento Gonçalves, 9500, CEP 91500-970, Porto Alegre, RS, Brazil;4. Department of Soils, Federal University of Rio Grande do Sul, Bento Gonçalves, 7712, CEP 91540-000, Porto Alegre, RS, Brazil;5. Institute of Petroleum and Natural Resources, PUCRS, Av. Ipiranga, 6681, Prédio 96J, Porto Alegre, RS, Brazil;1. Department of Earth and Environmental Sciences – University of Milano-Bicocca, Piazza della Scienza 1, 20126, Milano, Italy;2. Department of Chemistry, Universidad Técnica Federico Santa María, Av. España 1680, Valparaíso, Chile;3. Ricerca sul Sistema Energetico – RSE Spa, Department of Sustainable Development and Energy Sources, Via Rubattino, 54, 20134 Milan, Italy;4. INAIL Settore Ricerca, Certificazione e Verifica, Dipartimento di Innovazione Tecnologica (DIT) Laboratorio di Biotecnologie, Rome, Italy;5. Faculty of Chemical Engineering, Urmia University of Technology, Urmia, Iran;1. State Key Laboratory of Heavy Oil Processing, Beijing Key Lab of Oil & Gas Pollution Control, University of Petroleum-Beijing, Beijing 102249, China;2. College of Chemical Engineering, University of Petroleum-Beijing, Beijing 102249, China
Abstract:
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Highlights► Ethanol could hinder BTEX attenuation by various biogeochemical mechanisms. ► O2 depletion, enzyme repression and metabolic flux dilution elongate BTEX plumes. ► Elongation is site-specific and is offset by fortuitous growth of BTEX degraders. ► Ethanol migrates through the capillary fringe, a zone of high microbial activity. ► Ethanol-derived CH4 could pose an explosion risk and enhance BTEX vapor intrusion.
