Ozonation with ultrasonic enhancement of p-nitrophenol wastewater.
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 O(3) in solution because of ultrasonic dispersion.
Xu
Xian-Wen
XW
Department of Environmental Science and Engineering, Zhejiang University, Hangzhou 310027, China. xxw118@zju.edu.cn
Shi
Hui-Xiang
HX
Wang
Da-Hui
DH
D006861:Hydrogen Peroxide / Q000737:chemistry; D009596:Nitrophenols / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry; D010126:Ozone / Q000737:chemistry*; D012996:Solutions; D013010:Sonication; D014865:Waste Disposal, Fluid; D014876:Water Pollution
D009596:Nitrophenols; D012996:Solutions; D010126:Ozone; D006861:Hydrogen Peroxide; D010100:Oxygen