Assessment of a cryogenic coring method to preserve depth-discrete distributions of trichloroethylene and volatile reaction products in a low-permeability aquitard

dc.contributor.advisorWerth, Charles J.
dc.creatorKearney, Kade J.
dc.date.accessioned2023-01-20T19:42:30Z
dc.date.available2023-01-20T19:42:30Z
dc.date.created2022-08
dc.date.issued2022-08-16
dc.date.submittedAugust 2022
dc.date.updated2023-01-20T19:42:31Z
dc.description.abstractBack diffusion of trichloroethylene (TCE) from low permeability zones (LPZs), such as clay aquitards, presents a challenge in attainment of site cleanup goals. There is not a clear understanding of the extent by which naturally occurring reactions can attenuate TCE and its daughter products within the LPZs. In this study, a soil coring method that freezes the soil in-situ (a.k.a., cryogenic coring) was utilized to measure depth-discrete distributions of TCE and its volatile reaction products through a TCE-impacted silty clay aquitard. The results were compared with those from adjacent soil cores taken using a conventional coring approach, and found the two coring methods recovered statistically equivalent concentrations of select volatiles across most depths. Biotic reductive dechlorination was found to be the dominant TCE reaction pathway at the site, and concentrations of TCE, cis-1,2-dichloroethylene (DCE), vinyl chloride (VC), ethane, and methane were all compared between the two coring methods. Benefits of the cryogenic coring were better recovery of dispersed sand layers and more variable concentration profiles for TCE, DCE, and VC.
dc.description.departmentEnvironmental and Water Resources Engineering
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/2152/117271
dc.identifier.urihttp://dx.doi.org/10.26153/tsw/44152
dc.language.isoen
dc.subjectRemediation
dc.subjectTrichloroethylene
dc.subjectNatural attenuation
dc.subjectLow permeability
dc.titleAssessment of a cryogenic coring method to preserve depth-discrete distributions of trichloroethylene and volatile reaction products in a low-permeability aquitard
dc.typeThesis
dc.type.materialtext
thesis.degree.departmentEnvironmental and Water Resources Engineering
thesis.degree.disciplineEnvironmental and Water Resources Engineering
thesis.degree.grantorThe University of Texas at Austin
thesis.degree.levelMasters
thesis.degree.nameMaster of Science in Engineering
Files
Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
KEARNEY-THESIS-2022.pdf
Size:
1020.88 KB
Format:
Adobe Portable Document Format
License bundle
Now showing 1 - 2 of 2
No Thumbnail Available
Name:
PROQUEST_LICENSE.txt
Size:
4.46 KB
Format:
Plain Text
Description:
No Thumbnail Available
Name:
LICENSE.txt
Size:
1.85 KB
Format:
Plain Text
Description: