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 incre...

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Bibliographic Details
Published in:Ultrasonics sonochemistry 2004, Vol.11 (1), p.43-46
Main Authors: Hao, Hongwei, Chen, Yifang, Wu, Minsheng, Wang, Hai, Yin, Yingwu, Lü, Zhaolin
Format: Article
Language:English
Subjects:
Cavitation
Chlorophenols - chemistry
Chlorophenols - radiation effects
Degradation
High frequency ultrasound
Kinetics
Mass spectra
Mass Spectrometry
Oxidation-Reduction
p-Chlorophenol
Pyrolysis
Spectrophotometry, Ultraviolet
Ultrasonics
Water Supply - analysis
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Summary: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.
ISSN:1350-4177
1873-2828
DOI:10.1016/S1350-4177(03)00114-7