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Sonochemical Decomposition of Phenol: Evidence for a Synergistic Effect of Ozone and Ultrasound for the Elimination of Total Organic Carbon from Water

Lesko, Timothy and Colussi, Agustín J. and Hoffmann, Michael R. (2006) Sonochemical Decomposition of Phenol: Evidence for a Synergistic Effect of Ozone and Ultrasound for the Elimination of Total Organic Carbon from Water. Environmental Science and Technology, 40 (21). pp. 6818-6823. ISSN 0013-936X. https://resolver.caltech.edu/CaltechAUTHORS:20150623-154753039

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Abstract

Advanced oxidation processes (AOPs) for water and wastewater treatment are often handicapped by their inability to completely eliminate total organic carbon (TOC). In order to explore the capability of the combination of ultrasonic irradiation with ozone for the rapid removal of TOC, we examined the degradation rates of dissolved phenol (C_6H_5OH) in water with high-frequency ultrasound over the range of 200−1000 kHz, with ozone and with the combined application of sonication and ozonation. When ozone and ultrasound are applied simultaneously, a pronounced synergistic effect is observed that leads to the complete and rapid elimination of TOC at enhanced reaction rates. At longer reaction times, phenol oxidation by O_3 leads to oxalate and formate, which accounts for the majority of the residual TOC. However, the combination of US (ultrasound) and ozone together readily oxidizes HCO_2- and C_2O_4^(2-) to CO_2 while they prove to be relatively resistant to further oxidation to CO_2 by O_3 alone.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/es052558iDOIArticle
http://pubs.acs.org/doi/abs/10.1021/es052558iPublisherArticle
ORCID:
AuthorORCID
Colussi, Agustín J.0000-0002-3400-4101
Hoffmann, Michael R.0000-0001-6495-1946
Additional Information:© 2006 American Chemical Society. Received for review December 21, 2005. Revised manuscript received July 31, 2006. Accepted July 31, 2006.
Issue or Number:21
Record Number:CaltechAUTHORS:20150623-154753039
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150623-154753039
Official Citation:Sonochemical Decomposition of Phenol:  Evidence for a Synergistic Effect of Ozone and Ultrasound for the Elimination of Total Organic Carbon from Water Timothy Lesko, Agustin J. Colussi, and Michael R. Hoffmann Environmental Science & Technology 2006 40 (21), 6818-6823 DOI: 10.1021/es052558i
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:58468
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:29 Jul 2015 15:02
Last Modified:03 Mar 2020 13:01

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