在旋转填料床中进行Fe²⁺/O₃降解硝基苯废水的实验研究，并考察了初始pH、超重力因子β、液体流量、Fe²⁺浓度对硝基苯去除率的影响。结果表明，在硝基苯质量浓度为175 mg/L、臭氧质量浓度为40 mg/L、气体流量为75 L/h、pH为3.5、超重力因子β=80、液体流量为140 L/h、Fe²⁺浓度为0.4 mmol/L、循环处理40 min的条件下，硝基苯去除率和COD去除率分别为99.5%和67.97%。相同实验条件下，与O₃-RPB相比，该工艺的硝基苯去除率和COD去除率分别提高了7.1%和27.51%；与Fe²⁺/O₃/BR工艺相比，该工艺的硝基苯去除率和COD去除率分别提高了27.2%和32.55%。表明将超重力技术与均相催化臭氧技术相结合，可实现硝基苯的高效降解。

The experimental study on degradation of nitrobenzene wastewater over Fe²⁺/O₃ is carried out in a rotating packed bed.The effects of initial pH value,high gravity factor β,liquid flow and Fe²⁺ concentration on the removal rate of nitrobenzene are investigated.The results show that the removal rates of nitrobenzene and COD can reach 99.5% and 67.97% respectively when the concentration of nitrobenzene is 175 mg·L^-1,mass concentration of ozone being 40 mg·L^-1,gas flow 75 L·h^-1,initial pH 3.5,β=80,liquid flow 140 L·h^-1,Fe²⁺ concentration 0.4 mmol·L^-1 and recycling time 40 minutes.Under the same conditions,the removal rate of nitrobenzene and COD increase by 7.1% and 27.51% respectively compared with O₃-RPB technology,and increase by 27.2% and 32.55% respectively compared with Fe²⁺/O₃/BR technology.This translates that the high gravity technology combining with homogeneous catalytic ozonation technology is profitable,which can realize high efficient degradation of nitrobenzene.

杨鹏飞(1993-),男,硕士研究生,主要从事超重力技术在硝基苯废水处理方面的应用研究,1738746343@qq.com