Abstract:

Taking simulated methyl orange wastewater as the research object,the effects of the influencing factors of multi-frequency ultrasonic on the degradation of methyl orange are investigated by orthogonal tests.The results show that the influence weights of orthogonal factors are as follows:the power of multi-frequency ultrasonicultrasonic reaction timeinitial concentration of methyl orange.Under the following optimum process conditions:multi-frequency ultrasonic power is 150 W,reaction time of multi-frequency ultrasonic 90 min,and initial concentration of methyl orange 10 mg/L,the decolorization rate of the solution is 89.6%.When pH=2,the decolorization rate can reach 98%.When CaCl₂is added,both the decolorization rate and COD removing rate of methyl orange are over 96%.In short,the degradation effectiveness of methyl orange wastewater by multi-frequency ultrasonic can significantly be improved by reducing pH,raising temperature and adding CaCl₂.

Key words: multi-frequency ultrasonic, methyl orangede, colorization rate, dye wastewater

摘要：

以甲基橙模拟废水为研究对象,用正交实验考察了影响复频超声降解甲基橙的因素。结果表明,正交因子影响权重:复频超声功率>超声作用时间>甲基橙初始浓度。最佳工艺条件:复频超声功率为150 W,超声作用时间为90 min,甲基橙初始质量浓度为10 mg/L,在此条件下,溶液脱色率为89.6%;当pH=2时,脱色率可达98%;添加CaCl2,脱色率和COD去除率均超过96%。总之,降低pH,提高温度,添加CaCl2均能显著提高复频超声降解甲基橙废水的效果。

关键词: 复频超声, 甲基橙, 脱色率, 染料废水

CLC Number: 

• X703.1