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The Sonolytic Destruction of Methyl tert-Butyl Ether Present in Contaminated Groundwater

Hung, Hui-Ming and Kang, Joon-Wun and Hoffmann, Michael R. (2002) The Sonolytic Destruction of Methyl tert-Butyl Ether Present in Contaminated Groundwater. Water Environment Research, 74 (6). pp. 545-556. ISSN 1061-4303. https://resolver.caltech.edu/CaltechAUTHORS:20150806-153837630

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Abstract

Ultrasonic irradiation in the presence of ozone was used to efficiently eliminate methyl tert-butyl ether (MTBE) from groundwater. The sonolytic degradation of MTBE was investigated in three different reactor configurations and frequencies: vibrating-plate reactor (VPR, 358 kHz), near-field acoustical processor (NAP 20 and 16 kHz), and radial-tube resonator (RTR, 20 kHz). The sonochemical reactors can be ordered in terms of their efficiency with respect to the degradation of MTBE in the following way: VPR > RTR > NAP. The higher elimination rates of MTBE in groundwater by combined ultrasound–ozone systems are attributed to the effective conversion of ozone to the OH radical, even in the presence of high alkalinity. Carbonate radicals, which were formed from the oxidation of bicarbonate by hydroxyl radicals, are shown to react with MTBE via a hydrogen-atom abstraction pathway. Methyl-tert-butyl ether was also rapidly eliminated from the groundwater underlying a major international airport by direct chemical oxidation with a mixture of hydrogen peroxide and ozone.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.2175/106143002X140350DOIArticle
http://www.ingentaconnect.com/content/wef/wer/2002/00000074/00000006/art00006PublisherArticle
ORCID:
AuthorORCID
Hung, Hui-Ming0000-0002-6755-6359
Hoffmann, Michael R.0000-0001-6495-1946
Additional Information:© 2002 Water Environment Federation. Submitted for publication January 4, 2000; revised manuscript submitted May 24, 2002; accepted for publication June 10, 2002. Support for this research was provided by the Defense Advanced Research Project Agency, Arlington, Virginia; Office of Naval Research, Arlington, Virginia; and Department of Energy, Argonne, Illinois.
Funders:
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Office of Naval Research (ONR)UNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Subject Keywords:ultrasonic irradiation, methyl tert-butyl ether, groundwater, ozone, hydrogen peroxide, sonolysis
Issue or Number:6
Record Number:CaltechAUTHORS:20150806-153837630
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150806-153837630
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59275
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:10 Aug 2015 16:13
Last Modified:09 Mar 2020 13:18

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