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dc.contributor.advisor Alvarez, Pedro J.
dc.creatorGomez, Diego E.
dc.date.accessioned 2009-06-03T21:10:09Z
dc.date.available 2009-06-03T21:10:09Z
dc.date.issued 2007
dc.identifier.urihttps://hdl.handle.net/1911/20555
dc.description.abstract A mathematical module was developed to evaluate the effect of the common fuel additive, ethanol, on benzene fate and transport in groundwater, and to discern the most influential benzene plume-elongating mechanisms. The module, developed for the RT3D (Reactive Transport in 3-Dimensions) model, includes previously evaluated fate and transport processes (advection, dispersion, adsorption, biodegradation and depletion of molecular oxygen during ethanol degradation) and substrate interactions (dilution of benzene metabolic flux, catabolite repression and microbial populations shifts) previously not considered. Benzene plume elongation predictions, based on literature model parameters, were on the order of 22%-40% for a constant source of E10 gasoline (10% v/v ethanol), which compares favorably to field observations (56%, Ruiz-Aguilar et al., 2003). Oxygen depletion during ethanol degradation was the principal mechanism hindering benzene natural attenuation, followed by metabolic flux dilution. When oxygen is not limiting, model simulations showed that microbial growth on ethanol could offset negative substrate interactions and enhance benzene degradation, resulting in shorter plumes.
dc.format.extent 79 p.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subjectEnvironmental science
Environmental engineering
dc.title Simulation of effects of ethanol on benzene plume length using RT3D with a general substrate interaction module
dc.type.genre Thesis
dc.type.material Text
thesis.degree.department Environmental Science and Engineering
thesis.degree.discipline Engineering
thesis.degree.grantor Rice University
thesis.degree.level Masters
thesis.degree.name Master of Science
dc.identifier.citation Gomez, Diego E.. "Simulation of effects of ethanol on benzene plume length using RT3D with a general substrate interaction module." (2007) Master’s Thesis, Rice University. https://hdl.handle.net/1911/20555.


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