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used t s conta than O3 ation o using ozone combined with Fenton reagent (O3/Fenton) in a rotating packed of its difficulty in degradation, wastewater containing phenol poses a serious problem to the environment. Wastewater with a high concentration of phenol is usually trea-ted by an extraction process to reuse phenol [1,2]. Wastewater with a low concentration of phenol is not easily extracted, and is also difficult to treat by conventional biological processes due to the low biodegradability. Several advanced technologies such as ation is effective e high oxidation ent on bio t ozone o phenol rapidly with a reaction rate of 1.3 103 M1 s1. et al. [14] obtained a phenol removal rate of 100 % after 15 treatment by using ozonation process. Chedeville et al. [ ported that ozone mass transfer was the limiting step of ozonation of phenol. Fenton reaction is also an effective method for phenol degrada-tion [11,16]. The Fenton reagent consists of hydrogen peroxide and ferrous salts such as ferrous sulfate. In Fenton reaction, H2O2 decomposes catalytically by Fe2+ to O2 and H2O rapidly with a large amount of hydroxyl radicals yielded [17]. Fenton reaction was used in acidic environment due to the instability of Fe2+ in basi