摘要
分别采用臭氧、单频超声协同臭氧处理、双频超声强化臭氧氧化处理对硝基苯胺废水,考察了废水初始pH、臭氧通入量、超声波频率及功率等因素对处理效果的影响。结果表明,超声与臭氧协同作用可以有效地降解对硝基苯胺废水,且以双频超声强化臭氧氧化效果最佳,其优化处理条件:pH为11,臭氧的产生速率为30 mg.min-1,双频功率搭配为110 W-50 W,反应时间为50 min。此时COD、对硝基苯胺和硝基苯的去除率分别为96.4%、99.8%和98.8%,经处理后的水质能达到GB 8978-1996的一级排放标准。
The dual-frequency ultrasonic enhanced ozonation was applied to treat the wastewater containingp-nitroaniline. The factors, such as the wastewater initial pH, the ozone inflow, the frequency and power of ultrasonic were investigated by experiment to determine the optimal condition of the treatment by dual-frequency ultrasonic/ozone. The results showed that ozonation combined with dual-frequency ultrasonic was effective for the degradation of wastewater containing p-nitroaniline, the best removal rates of COD, p-Nitroaniline and nitrobenzene were 96.4%, 99.8% and 98.8% respectively at pH=11, velocity of O3=30 mg-min^-1, dual-frequency of 110 W-50 W and reaction time=50 rain. The indexes of the effluent can reach the first criteria specified in integrated wastewater discharge standard （GB 8978-- 1996）.
出处
《水处理技术》
CAS
CSCD
北大核心
2011年第4期64-67,71,共5页
Technology of Water Treatment
基金
西南科技大学环境工程省级实验教学示范中心支助项目(053005)
关键词
臭氧
双频超声波
对硝基苯胺废水
ozone
dual-frequency ultrasonic
pharmaceutical wastewater containing p-nitroaniline
