In this study, O₃/FeOOH was used for degradation of nitrobenzene (NB) wastewater in a rotating packed bed (RPB) in order to improve the efficiency of heterogeneous catalytic ozonation, and the effects of high gravity factor β, FeOOH concentration, inlet O₃ concentration, liquid flow rate, initial pH and initial NB concentration on the degradation rate of NB and the removal rate of COD were also investigated. The results show that under the optimal conditions (high gravity factor β = 40, FeOOH concentration = 0.5 mg L⁻¹, inlet O₃ concentration = 40 mg L⁻¹, liquid flow rate = 60 L h⁻¹, initial pH = 7, initial NB concentration = 100 mg L⁻¹), the degradation rate of NB reaches 100 % after 20 min and the removal rate of COD reaches 94 % after 40 min. Tertiary butyl alcohol (TBA)is added to trap hydroxyl radicals, and the results show that the oxidation by hydroxyl radicals plays a dominant role in the degradation of NB. Gas chromatography-mass spectrometry was performed to investigate the degradation intermediates and the possible degradation pathways of NB by O₃/FeOOH in the RPB were also proposed.

在这项研究中，O ₃ / FeOOH用于在旋转填充床（RPB）中降解硝基苯（NB）废水，以提高非均相催化臭氧化的效率，以及高重力因子β，FeOOH浓度，进水口的影响。还研究了O ₃浓度，液体流速，初始pH和初始NB浓度对NB降解率和COD去除率的影响。结果表明，在最佳条件下（高重力因子β= 40，FeOOH浓度= 0.5 mg L ^-1，入口O ₃浓度= 40 mg L ^-1，液体流速= 60 L h ^-1，初始pH = 7 ，初始NB浓度= 100 mg L ^-1），20分钟后NB的降解率达到100％，40分钟后COD的去除率达到94％。加入叔丁醇（TBA）捕获羟基自由基，结果表明羟基自由基的氧化在NB的降解中起主要作用。进行了气相色谱-质谱法研究降解中间体，并提出了RPB中O ₃ / FeOOH对NB的可能降解途径。