超声耦合非均相催化过硫酸钠降解水中苯胺

Degradation of Aniline in Water With Sodium Persulfate by Ultrasonic-assisted Fe_3O_4@AC Heterogeneous Catalysis

利用共沉淀-浸渍的方法,制备出Fe_3O_4@AC非均相磁性催化剂,并在超声辐照条件下,采用该催化剂催化过硫酸钠降解水中的苯胺。实验结果表明,超声耦合Fe_3O_4@AC非均相催化过硫酸钠降解水中苯胺具有较好的效果,当超声功率为100 W,频率45 Hz,pH为3.0,过硫酸盐浓度为240 mg/L,温度20oC时,反应时间为30 min时苯胺的去除率达到了91.5%。而且苯胺的降解过程遵循准一级动力学过程。

Fe3O4@AC heterogeneous magnetic catalyst was synthesized by eoprecipitation and dipping method. Degradation of aniline in water was carried out with sodium persulfate by the catalyst under the condition of ultrasonic irradiation. The results show that the degradation effect of aniline with sodium persulfate by ultrasonic-assisted Fe3O4@AC heterogeneous catalysis is better. Under the optimal conditions of ultrasonic power 100W, frequency45 Hz, pH 3.0, Na2S2O8 concentration 240 mg/L aniline, reaction temperature 20℃ and reaction time 30 rain, the degradation rate can reach to 91.5%; and the aniline degradation process follows the pseudo-first order kinetic law.