New approach to degrade sodium dodecyl benzene sulphonate in water by ultrasonic irradiation
A new method of ultrasonic irritation was applied to decompose sodium dodecyl benzene sulphonate (SDBS) in aqueous solution. Influence factors of degradation efficiency and mechanism were discussed, i.e sonication time, ultrasonic frequency, ultrasonic power, ultrasonic intensity, probe diameter, initial pH value and cavitating gases. The mechanism and process of ultrasonic degradation of SDBS were investigated by characterizing the sample with IR and chemical methods. The results showed that degradation efficiencies of SDBS increase linearly with sonication time in the first-order kinetics (r=0.985). It is not clear to the effects of change of ultrasonic frequency in low frequency ranges on the degradation of SDBS. With the increasing of ultrasonic power, intensity and probe diameters, degradation efficiencies of SDBS increase with a maximum value of 42.5%. Effects of initial pH value on SDBS degradation are significant and acidic condition is more favorable for the reaction. The remarkable sequence of the above factors was ultrasonic power > initial pH value > probe diameter > ultrasonic frequency. The attendance of selected cavitating gases enhanced the degradation of SDBS, among which the most contribution gas was Ar, then O2 and N2.In combination with the above factors, SDBs was decomposed effectively by sonication.
ultrasonic wave degradation sodium dodecyl benzene sulphonate organic pollutant
Hongjie Sun Yinan Zhao Kun Ma Huiming Jiang Lei Liu Yubo Cui
Department of Environmental Engineering, Dalian Nationalities University, 116600
国际会议
2009 Beijing International Environmental Technology Conference(2009北京国际环境技术会议暨第五届“中、德、波环境技术研讨会)
北京
英文
371-382
2009-10-16（万方平台首次上网日期，不代表论文的发表时间）