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Comparison of enhancement of pentachlorophenol sonolysis at 20 kHz by dual-frequency sonication |
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| Authors: | Wang Songlin Huang Bingbing Wang Yansong Liao Li |
| Institution: | aSchool of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China bSchool of Stomatology, Wuhan University, Wuhan 430079, PR China |
| Abstract: | The comparison of enhancement effect of pentachlorophenol sonolysis at 20 kHz by different dual-frequency ultrasonic irradiations has been investigated. Dual-frequency (20 kHz/40 kHz, 20 kHz/530 kHz, 20 kHz/800 kHz and 20 kHz/1040 kHz) ultrasounds have been used. It has been found that the rate of pentachlorophenol degradation at dual-frequency ultrasonic irradiation is the highest compared to mono-frequency ultrasonic systems. The combination of dual-frequency systems has synergistic effect and the enhancement effect of sonochemical degradation of pentachlorophenol at 20 kHz by dual-frequency systems appears to be remarkable frequency sensitive. The order of contribution to the enhancement effect of sonochemical degradation of pentachlorophenol at 20 kHz is as follows: 530 kHz > 800 kHz > 40 kHz > 1040 kHz. |
| Keywords: | Dual-frequency ultrasonic irradiation Pentachlorophenol Hydroxyl radical Synergistic effect Frequency effect |
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