硝基苯类制药废水催化氧化降解的研究

Study on degradation of pharmaceutical wastewater via Ultrasound-assisted Fenton oxidation

采用超声波/Fenton试剂降解硝基苯类制药废水,研究了有关的工艺条件和硝基苯降解率的关系,并对其降解动力学规律进行了初步探讨。结果表明,降解反应的最佳工艺条件为:在常温常压下,反应时间为40 min,pH值为3,H2O2浓度和Fe2+浓度分别为200 mmol和20 mmol/L,超声功率为400 W,硝基苯降解效率可达94%。超声/Fenton对废水的处理符合一级动力学规律,超声/Fenton缩短了反应时间,提高了降解效率,体现了协同作用的优点。

Using Ultrasound （ US ）/Fenton reagent tO degrade nitrobenzene compounds in pharmaceutical wastewater we study the relationship between the conditions and degradation rate and search the degradation kinetics. The results show that the optimal conditions are： in the normal temperature and pressure, the treatment time is 40 min, pH value is 3, the concentration of H2O2 and Fe^2＋ are 200 mmol/L and 20 mmol/L respectively, the ultrasonic power is 400 W, the degradation efficiency is up to 940/60. The degradation kinetics follows the first order action law. The Ultrasound （US）/Fenton shortens the treatment time and increase the degradation efficiency, which presents the cooperative features.