Masters Theses
Abstract
"Recent interest in the use of phyto-mapping for plume delineation at contaminated sites has promoted a need for new and innovative sampling techniques. Solid-phase micro-extraction (SPME) methods have been developed as a chemical analysis tool offering fast, simple, non-invasive sampling without the use of solvents. In this study SPME devices were tested for applicability for in-planta detection of chlorinated solvents. To evaluate the use of SPME for VOCs in-planta a number of integrated studies were undertaken. Uptake profiles were developed for nine chlorinated solvents in a liquid polydimethylsiloxane (PDMS) matrix with 100 µm Carboxene SPME fibers. Timeweighted average (TWA) sampling was conducted by exposing the SPME fiber to the chemical mixtures using three retraction lengths. Linear uptake profiles were demonstrated for 25 of the 27 of the sampling conditions. A storage experiment was conducted to determine sample retention on the SPME fiber for transport prior to analysis. It was demonstrated that all chemicals except dichloromethane are retained on the fiber for up to 24 hours. Field sampling with SPME devices was conducted at a known chlorinated solvent contaminated site using a newly designed in-planta sampler. Sampling with SPME fibers produced detections ranging from 5 to 234 times higher than tree core sampling"--Abstract, page iii.
Advisor(s)
Burken, Joel G. (Joel Gerard)
Committee Member(s)
Fitch, Mark W.
Ludlow, Douglas K.
Department(s)
Civil, Architectural and Environmental Engineering
Degree Name
M.S. in Environmental Engineering
Sponsor(s)
United States. Environmental Protection Agency
National Science Foundation (U.S.)
Publisher
Missouri University of Science and Technology
Publication Date
Spring 2009
Pagination
ix, 67 pages
Rights
© 2009 Emily Moore Sheehan, All rights reserved.
Document Type
Thesis - Open Access
File Type
text
Language
English
Subject Headings
Extraction (Chemistry)Organochlorine compounds -- BiodegradationPhytoremediationSolvents -- Biodegradation
Thesis Number
T 9494
Print OCLC #
436098089
Electronic OCLC #
401304322
Recommended Citation
Sheehan, Emily Moore, "Time-weighted average solid-phase microextraction (TWA-SPME) for in-planta detection of chlorinated solvents" (2009). Masters Theses. 6888.
https://scholarsmine.mst.edu/masters_theses/6888