Xie Wei-Ping, Qin Yan, Zou Yuan, He De-Wen, Song Dan
Shenzhen Key Laboratory of Industrial Water Conservation & Municipal Wastewater Resources Technology, Shenzhen Polytechnic, Shenzhen 518055, China.
Huan Jing Ke Xue. 2010 Sep;31(9):2092-9.
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.
采用高频超声辐照研究了含MX - 5B的偶氮染料废水的降解情况。研究了溶液初始pH值、超声分解参数、曝气、Fe2 +浓度等不同因素的影响，初步探讨了复合频率的协同作用及降解机理。结果表明，超声辐照可有效降解水溶液中的MX - 5B，当pH值为3.5、超声频率为418.3 kHz、超声功率为69 W时，180 min内脱色率可达100%。添加Fe2 +和曝气有一定影响。结果还表明，自由基氧化控制了MX - 5B的超声分解，在本研究测试的不同实验条件下，MX - 5B的超声去除表现为准一级动力学。处理前后的紫外 - 可见吸收光谱比较表明，超声辐照后共轭结构和部分芳香结构均被破坏。
