title: Comparison of enhancement of pentachlorophenol sonolysis at 20 kHz by dual-frequency sonication.
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.
authors.affiliation: School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, PR China.
authors.forename: Songlin
authors.initials: S
authors.lastname: Wang
authors.forename: Bingbing
authors.initials: B
authors.lastname: Huang
authors.forename: Yansong
authors.initials: Y
authors.lastname: Wang
authors.forename: Li
authors.initials: L
authors.lastname: Liao
mesh_terms: D006358:Hot Temperature; D017665:Hydroxyl Radical; D007700:Kinetics; D010416:Pentachlorophenol / Q000494:pharmacology*; D013010:Sonication; D013696:Temperature; D013997:Time Factors; D014465:Ultrasonics; D014867:Water / Q000737:chemistry
chemical_list: D014867:Water; D017665:Hydroxyl Radical; D010416:Pentachlorophenol