Sonochemistry of degrading p-chlorophenol in water by high frequency ultrasound.
The degradation process and mechanism of p-chlorophenol in water using high frequency ultrasound (1.7 mHz) was investigated in this paper. The p-chlorophenol was degraded successfully in the high frequency ultrasonic device with low consumption of energy. The degradation effect was improved by increasing the solution concentration. No products or intermediate products were detected in the reaction mixture by the analytic methods of MS and 1H-NMR after ultrasonic irradiation. The dominant degradation mechanism is high temperature pyrolysis in ultrasonic cavities rather than free radical oxidation, and the experimental results can be explained completely according to pyrolysis mechanism.
Hao
Hongwei
H
Department of Mechanical Engineering, Tsinghua University, 100084 Beijing, PR China. hhw99@mails.tsinghua.edu.cn
Chen
Yifang
Y
Wu
Minsheng
M
Wang
Hai
H
Yin
Yingwu
Y
Lü
Zhaolin
Z
D002733:Chlorophenols / Q000737:chemistry / Q000528:radiation effects*; D007700:Kinetics; D013058:Mass Spectrometry; D010084:Oxidation-Reduction; D013056:Spectrophotometry, Ultraviolet; D014465:Ultrasonics; D014881:Water Supply / Q000032:analysis*
D002733:Chlorophenols; C029107:4-chlorophenol