Journal of Zhejiang University SCIENCE
(ISSN 1009-3095, Monthly)
2005 Vol. 6B No. 5 p.319-323
Ozonation with ultrasonic enhancement of p-nitrophenol wastewater
XU Xian-wen†, SHI Hui-xiang, WANG Da-hui
(Department of Environmental Science and Engineering, Zhejiang University, Hangzhou 310027, China)
†E-mail:x xxw118@zju.edu.cn
Received Oct. 15, 2004; revision accepted Jan. 27, 2005
Abstract: Synergetic effects for p-nitrophenol degradation were observed in the ozonation with ultrasonic enhancement. The enhancements of removal rate for p-nitrophenol and TOC were around 116% and 294% respectively in comparison with the individual ultrasound and ozonation systems. The synergetic phenomenon is attributed to two physicochemical mechanisms: (1) Ultrasound decomposes ozone causing augmentation of the activity of free radicals; (2) Ultrasonic wave increased the concentration of O3 in solution because of ultrasonic dispersion.
Key words: Ozonolysis, Sonolysis, Synergetic effect, p-nitrophenol degradation
doi:10.1631/jzus.2005.B0319 CLC number: TQ150.9; X783