Impacts of heterogeneous sedimentary organic matter on phenanthrene sorption and fate processes.

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dc.contributor.advisorSabatini, David,en_US
dc.contributor.authorKarapanagioti, Hrissi Kassiani.en_US
dc.date.accessioned2013-08-16T12:30:47Z
dc.date.available2013-08-16T12:30:47Z
dc.date.issued1999en_US
dc.description.abstractNatural attenuation is currently one of the most important topics in groundwater management. Sorption and biodegradation are key processes impacting the efficiency of natural attenuation. Although extensive literature has been published on these topics additional research is required. Both processes are represented in ground water models using simplified relationships, which may result in predictions that are orders of magnitude different from actual results.en_US
dc.description.abstractChapter 3 addresses organic matter heterogeneity with depth by examining four samples taken from different depths of the same aquifer. A significant contribution of this chapter is the use of organic petrology as a quantitative tool for predicting equilibrium sorption properties as a function of organic matter characteristics. Organic carbon content values varied by one order of magnitude and sorption capacities varied by two orders of magnitude within a given depth and location for these samples.en_US
dc.description.abstractFinally, the intraparticle sorption model from Chapters 1--3 is expanded to include biodegradation in Chapter 4. Once validated, the model is used to perform sensitivity analyses, which show that sorption nonlinearity is important when studying coupled sorption and biodegradation processes. The sensitivity analyses also define scenarios where the sorption/desorption kinetics strongly impact biodegradation kinetics.en_US
dc.description.abstractIn summary, heterogeneous organic matter has been observed in an alluvial sediment. Each chapter presents different aspects of the impact this heterogeneity has on sorption properties, with the final chapter illustrating the potential impact on biodegradation. This knowledge advances our understanding of natural attenuation, and can help guide us in enhancing this attenuation when so desired.en_US
dc.description.abstractChapters 1 and 2 present equilibrium and kinetic sorption results for Canadian River Alluvium (CRA) aquifer material with phenanthrene. CRA was divided into more homogeneous samples and their properties were tested. Chapter 1 demonstrates the improvement of the kinetic model fit for each subgroup by introducing a fast sorption term in a two-component model. Chapter 2 presents data and pictures of the most important organic matter types affecting sorption, including characterization by organic petrology methods. Heterogeneous organic matter was observed to significantly impact equilibrium and kinetic sorption, causing sorption properties to vary by one to two orders of magnitude for different organic matter types.en_US
dc.format.extentxiv, 158 leaves :en_US
dc.identifier.urihttp://hdl.handle.net/11244/5897
dc.noteMajor Professor: David Sabatini.en_US
dc.noteSource: Dissertation Abstracts International, Volume: 60-11, Section: B, page: 5412.en_US
dc.subjectEnvironmental Sciences.en_US
dc.subjectPhenanthrene.en_US
dc.subjectHydrology.en_US
dc.subjectHazardous wastes Natural attenuation.en_US
dc.subjectAgriculture, Soil Science.en_US
dc.subjectGroundwater.en_US
dc.subjectGeochemistry.en_US
dc.thesis.degreePh.D.en_US
dc.thesis.degreeDisciplineSchool of Civil Engineering and Environmental Scienceen_US
dc.titleImpacts of heterogeneous sedimentary organic matter on phenanthrene sorption and fate processes.en_US
dc.typeThesisen_US
ou.groupCollege of Engineering::School of Civil Engineering and Environmental Science
ou.identifier(UMI)AAI9952414en_US

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