title: [Research in high frequency ultrasonic for degradation of azo dye wastewater containing MX-5B].
abstract: The degradation of azo dye wastewater, containing MX-5B, was investigated by using high frequency ultrasonic irradiation. The effect of different factors like the initial pH of solution, sonolysis parameters, air-blowing, Fe2+ concentration were studied, the synergistic action of complex frequency and the mechanism of degradation was explored primarily. The results show that MX-5B in aqueous solution can be degraded efficiently by ultrasonic irradiation, when the pH 3.5, ultrasonic frequency 418.3 kHz, ultrasonic power 69 W, color removal rate up to 100% in 180 min. Adding of Fe2+ and blowing air had some effects. The results also indicated that radical-oxidation controlled the ultrasonic decompose of MX-5B and MX-5B ultrasonic removal was observed to behave as pseudo-first-order kinetics under different experimental conditions tested in the present work. Comparison of UV-Vis absorption spectrums before and after treatment showed that all of the conjugate structure and part of aromatic structure were destroyed after being ultrasonic irradiation.
authors.affiliation: Shenzhen Key Laboratory of Industrial Water Conservation & Municipal Wastewater Resources Technology, Shenzhen Polytechnic, Shenzhen 518055, China. xiewp@szpt.edu.cn
authors.forename: Wei-Ping
authors.initials: WP
authors.lastname: Xie
authors.forename: Yan
authors.initials: Y
authors.lastname: Qin
authors.forename: Yuan
authors.initials: Y
authors.lastname: Zou
authors.forename: De-Wen
authors.initials: DW
authors.lastname: He
authors.forename: Dan
authors.initials: D
authors.lastname: Song
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D019149:Bioreactors; D004396:Coloring Agents / Q000737:chemistry; D010084:Oxidation-Reduction; D014465:Ultrasonics; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry; D018508:Water Purification / Q000379:methods
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; C466318:Procion Red MX-5B; D014874:Water Pollutants, Chemical