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AN ENVIRONMENTALLY SUSTAINABLE DEVELOPMENT OF
ULTRASOUND-ASSISTED CHEMICAL PROCESS: THE USE OF FENTON’S
REAGENT AND ULTRASONIC TRANSDUCERS TO REMOVE METHYL
TERTIARY BUTYL ETHER FROM DRINKING WATER SUPPLIES
by
Hung-Li Chang
A Dissertation Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(ENVIRONMENTAL ENGINEERING)
December 2006
Copyright 2006 Hung-Li Chang
Object Description
| Title | An environmentally sustainable development of ultrasound-assisted chemical process: the use of Fenton's reagent and ultrasonic transducers to remove methyl tertiary butyl ether from drinking water supplies |
| Author | Chang, Hung-Li |
| Author email | hunglich@yahoo.com |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Environmental Engineering |
| School | Viterbi School of Engineering |
| Date defended/completed | 2006-09-07 |
| Date submitted | 2006 |
| Restricted until | Unrestricted |
| Date published | 2006-10-04 |
| Advisor (committee chair) | Yen, Teh Fu |
| Advisor (committee member) |
Pirbazari, Massoud M. Shing, Katherine S. |
| Abstract | Methyl tertiary butyl ether (MTBE) is used as a fuel additive to reduce air pollution. However, the threat to public health from MTBE contaminated groundwater prompted the legislature to ban MTBE. Through the years, numerous methods have been developed to treat MTBE, and many of these advanced treatment processes are complicated and costly. The present research investigates the development of a simple and cost-effective process for the degradation of MTBE.; Chain reactions involving ultrasound and Fenton's reagent are the epitome of this system. Fenton's reagent can be continuously supplied by sonolysis of water and naturally occurring metal salts in groundwater. The laboratory test results have shown complete MTBE degradation under the ultrasound-assisted chemical process (UACP) within one hour. For subsurface operations in the field, ultrasonic transducers attached on the double-wall pipe and horizontal directional drilling technology can greatly increase the effective area of in-situ remediation.; A whistle type in-line mixer installed in a re-circulating flow loop without external electric power was used to create hydrodynamic cavitation and induce oxidation in UACP. Experimental data have shown 13 percent addition to 75 percent degradation of MTBE by Fenton's reagent in five minutes.; The groundwater systems usually only have a water pump and a disinfection process. Once there is a MTBE plume approaching, the only choice for them is to shut down the production wells unless they have enough funding. Equipment wise, UACP only needs chemical pump and ultrasonic transducer. This allows for low cost, easy installation, convenient maintenance, and easy decommissioning. Therefore, UACP with in-line mixer can be used as a drinking water package plant to benefit small water systems in rural communities.; Furthermore, UACP can be placed at the start of a treatment chain to avoid contamination breakthrough, placed at the end of a treatment chain as a polishing step, or added to the distribution systems to solve disinfection by-product problem. |
| Keyword | ultrasound; Fenton's reagent; MTBE; sustanable development; Hydrogen Peroxide; in-line Mixer |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Type | texts |
| Legacy record ID | usctheses-m82 |
| Contributing entity | University of Southern California |
| Rights | Chang, Hung-Li |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | cisadmin@lib.usc.edu |
| Filename | etd-Chang-20061004 |
| Archival file | uscthesesreloadpub_Volume23/etd-Chang-20061004.pdf |
Description
| Title | Page 1 |
| Contributing entity | University of Southern California |
| Repository email | cisadmin@lib.usc.edu |
| Full text | AN ENVIRONMENTALLY SUSTAINABLE DEVELOPMENT OF ULTRASOUND-ASSISTED CHEMICAL PROCESS: THE USE OF FENTON’S REAGENT AND ULTRASONIC TRANSDUCERS TO REMOVE METHYL TERTIARY BUTYL ETHER FROM DRINKING WATER SUPPLIES by Hung-Li Chang A Dissertation Presented to the FACULTY OF THE GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (ENVIRONMENTAL ENGINEERING) December 2006 Copyright 2006 Hung-Li Chang |
