Ultrasonic irradiation of p-nitrophenol in aqueous solution
- Creators
- Kotronarou, A.
- Mills, G.
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Hoffmann, M. R.
Abstract
The kinetics and mechanism of the sonochemical reactions of p-nitrophenol have been investigated in oxygenated aqueous solutions. In the presence of ultrasound (20 kHz, 84 W) p-nitrophenol was degraded primarily by denitration to yield NO_2^-, NO_3^-, benzoquinone, hydroquinone, 4-nitrocatechol, formate, and oxalate. These reaction products and the kinetic observations are consistent with a model involving high-temperature reactions of p-nitrophenol in the interfacial region of cavitation bubbles. The main reaction pathway appears to be carbon-nitrogen bond cleavage. Reaction with hydroxyl radical provides a secondary reaction channel. The average effective temperature of the interfacial region surrounding the cavitation bubbles was estimated to be T ≃ 800 K.
Additional Information
© 1991 American Chemical Society. Received: August 17, 1990; In Final Form: November 19, 1990. Publication Date: May 1991. This research was supported by the US. EPA Office of Exploratory Research (Grant Nos. R813326-01-0 and R-815041-01-0).Additional details
- Eprint ID
- 59483
- DOI
- 10.1021/j100162a037
- Resolver ID
- CaltechAUTHORS:20150813-105952810
- Environmental Protection Agency (EPA)
- R813326-01-0
- Environmental Protection Agency (EPA)
- R-81504 -01-0
- Created
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2015-08-14Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field