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 trichloroethyle􀀐e 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

PDF

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

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