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Soil bacterial processes and dynamics

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dc.contributor.advisor Fowler, Andrew C.
dc.contributor.advisor Mitchell, Sarah L. Cribbin, Laura B. 2014-09-24T16:03:18Z 2014-09-24T16:03:18Z 2013
dc.description peer-reviewed en_US
dc.description.abstract Under the influence of regional groundwater ow, pollution in an aquifer can migrate to streams or wells. This can have catastrophic consequences for human health and local ecosystems. Fortunately, there is a suite of microorganisms that exist in the subsurface that can convert contaminants into less toxic chemicals. In this thesis, we seek to model the interaction between these microbial populations and the contaminant. A reaction-transport model is created to describe the migration of chemical species in a subsurface environment. With this model, we derive an expression for the location of a reaction front in the plume and the speed at which it moves. Oscillatory chemical concentration pro les are frequently observed in borehole readings but they are often dismissed as noisy data without closer examination. We propose that such oscillations are a result of microbial populations competing for nutrient sources. A description of this interaction is provided which is found to exhibit temporal and spatial oscillatory behaviour. A recent thesis by Razak (2009) is reviewed in which the phenol degradation rate by a particular strain of bacteria was experimentally measured. Building a modi ed version of the Van Impe et al. (2005) model, a description is derived of the biomass growth, oxygen depletion and phenol consumption in a continuous ow environment. en_US
dc.language.iso eng en_US
dc.publisher University of Limerick en_US
dc.subject pollution en_US
dc.subject soil bacteria en_US
dc.subject environment en_US
dc.title Soil bacterial processes and dynamics en_US
dc.type info:eu-repo/semantics/doctoralThesis en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.type.supercollection ul_theses_dissertations en_US
dc.contributor.sponsor SFI en_US
dc.relation.projectid 09/IN.1/I2645 en_US
dc.relation.projectid 06/MI/005 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US

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