In this study, high-gravity intensified heterogeneous catalytic ozonation is proposed for degradation of nitrobenzene (NB) in wastewater using Mn-Fe/ZSM-5 as the packing of the high-gravity rotating packed bed (RPB). The effects of inlet O₃ concentration, liquid flow rate, initial pH, and high-gravity factor on the removal rate of total organic carbon (TOC) at room temperature are investigated and compared with that in a bubbling reactor (BR), and the degradation mechanism is also discussed. The results show that under the optimal conditions of the high-gravity factor β = 20, initial O₃ concentration C_O3 = 25 mg/L, liquid flow rate Q_L = 60 L/h, and initial pH = 6, the removal rate of TOC reaches 72% after 40 min. The removal rate of TOC in RPB is 33.5% higher than that in BR. The radical quenching experiment shows that •OH plays a dominant role in high-gravity intensified heterogeneous catalytic ozonation with Mn-Fe/ZSM-5. It is concluded that high-gravity intensified heterogeneous catalytic ozonation with Mn-Fe/ZSM-5 can effectively improve the degradation efficiency of organic wastewater.

在这项研究中，使用 Mn-Fe/ZSM-5 作为高重力旋转填充床 (RPB) 的填料，提出了高重力强化多相催化臭氧化降解废水中的硝基苯 (NB)。研究了入口 O ₃浓度、液体流速、初始 pH 值和高重力因子对室温下总有机碳 (TOC) 去除率的影响，并与鼓泡反应器 (BR) 中的去除率进行了比较，并且还讨论了降解机制。结果表明，在高重力因子β= 20，初始的O在最佳条件下₃浓度C _O3  = 25毫克/升，液体流量Q_大号 = 60 L/h，初始 pH = 6，40 分钟后 TOC 去除率达到 72%。RPB中TOC的去除率比BR高33.5%。自由基淬火实验表明，•OH在Mn-Fe/ZSM-5的高重力强化多相催化臭氧化中起主导作用。结论 Mn-Fe/ZSM-5 的高重力强化多相催化臭氧化可有效提高有机废水的降解效率。