The application of ultrasound to zero-valent iron in column studies and a proposed mechanism for the iron-mediated reductive dehalogenation of trichloroethylene and formation of its by-products
Abstract
Groundwater contamination by chlorinated solvents has been found at many sites throughout the United States. One of the major areas of interest pertains to the development of cost-effective methods for remediating contaminated groundwater. Current treatment technologies, such as the pump-and-treat system involves the removal of contaminated water by pumping, followed by above ground treatment, have proven ineffective. In preparation for field-scale studies, column studies have been conducted to determine the effectiveness of using zero-valent iron to treat trichloroethylene contaminated groundwater. Data on the by-products of the chlorinated hydrocarbons will be used to propose possible mechanistic pathways by which the trichloroethylee can degrade. Batch studies were also performed to determine how the different dichloroethylene isomers degrade. In addition, because this is a corrosion process ultrasound was studied as a means of cleaning and rejuvenating the iron surface. Preliminary work suggests that sonication can enhance and restore the degradation rate of the iron by removing corrosion products from the iron surface, in effect extending the life of the treatment wall and decreasing long term costs.
Notes
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Graduation Date
1998
Semester
Summer
Advisor
Geiger, Cherie L.
Degree
Master of Science (M.S.)
College
College of Arts and Sciences
Department
Chemistry
Format
Pages
73 p.
Language
English
Length of Campus-only Access
None
Access Status
Masters Thesis (Open Access)
Identifier
DP0028700
Subjects
Arts and Sciences -- Dissertations, Academic; Dissertations, Academic -- Arts and Sciences
STARS Citation
Lau, Nancy, "The application of ultrasound to zero-valent iron in column studies and a proposed mechanism for the iron-mediated reductive dehalogenation of trichloroethylene and formation of its by-products" (1998). Retrospective Theses and Dissertations. 2442.
https://stars.library.ucf.edu/rtd/2442