Zhu Xiang-Feng, Xu Xin-Hua
Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, China.
J Zhejiang Univ Sci. 2004 Dec;5(12):1543-7. doi: 10.1631/jzus.2004.1543.
Fe (III)-catalyzed ozonation yielded better degradation rate and extent of COD (Chemical Oxygen Demand) or oxalic acid as compared with oxidation by ozone alone. Two parameters with strong effects on the efficiency of ozonation are pH of the solution and the catalyst (Fe(3+)) dosage. The existence of a critical pH value determining the catalysis of Fe (III) in acid conditions was observed in phenol and oxalic acid systems. The best efficiency of catalysis was obtained at a moderate concentration of the catalyst. A reasonable mechanism of Fe (III)-catalyzed ozonation of phenol was obtained based on the results and literature.
与单独使用臭氧氧化相比，铁（III）催化臭氧化对化学需氧量（COD）或草酸的降解速率和程度更高。对臭氧化效率有强烈影响的两个参数是溶液的pH值和催化剂（Fe(3+)）用量。在苯酚和草酸体系中观察到，在酸性条件下存在一个决定铁（III）催化作用的临界pH值。在催化剂浓度适中时可获得最佳催化效率。基于这些结果和文献，得出了铁（III）催化苯酚臭氧化的合理机理。
