Design and testing of a laboratory apparatus for scaled experiments of in-situ thermal desorption

dc.contributor.advisorKatz, Lynn Ellen
dc.contributor.advisorPope, G.A.
dc.creatorHartman, Meghan M.en
dc.date.accessioned2015-06-04T20:38:09Zen
dc.date.available2015-06-04T20:38:09Zen
dc.date.issued2006-08en
dc.descriptiontexten
dc.description.abstractThere are 1,305 Superfund Sites on the United States Environmental Protection Agencies National Priorities List that may require remediation due to the environmental or human health risks associated with subsurface contamination. The contaminants present at these sites and others vary with respect to their physical and chemical properties which dictate the selection of appropriate remediation technologies. In-Situ Thermal Desorption (ISTD) has been studied as a remediation technique for removing many recalcitrant contaminants from soil. ISTD involves passing electrical current through heating elements in wells and removing contaminants through heater/vacuum wells. Heating occurs by heat conduction through the soil. At high temperatures, even relatively low volatility contaminants can be vaporized, removed by vacuum and treated with an on-site recovery system. The main objective of this research was to design and test a laboratory apparatus scaled to a typical ISTD field site and to use it to conduct experiments that could be used to aid in the validation of the STARS numerical simulator. A dimensional analysis was done on the governing energy balance equation to determine the most important scaling groups for the ISTD process so the laboratory experiments could be scaled up to the field. The laboratory apparatus was modeled after a symmetry element of the hexagonal field pattern and a triangular glass prism was constructed for heated sandpack experiments. Temperature data was measured in dry sand, sand partially saturated with water, and sand with both water and PCE added to it. The apparatus was made of glass so that the behavior of the PCE contaminant could be observed when the sand was heated.en
dc.description.departmentEnvironmental and Water Resources Engineeringen
dc.format.mediumelectronicen
dc.identifier.urihttp://hdl.handle.net/2152/30139en
dc.language.isoengen
dc.rightsCopyright is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.en
dc.rights.restrictionRestricteden
dc.subjectIn-situ thermal desorptionen
dc.subjectISTDen
dc.subjectSubsurface contaminationen
dc.titleDesign and testing of a laboratory apparatus for scaled experiments of in-situ thermal desorptionen
dc.typeThesisen
thesis.degree.departmentEnvironmental and Water Resources Engineeringen
thesis.degree.disciplineEnvironmental and Water Resources Engineeringen
thesis.degree.grantorThe University of Texas at Austinen
thesis.degree.levelMastersen
thesis.degree.nameMaster of Science in Engineeringen

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