为提高臭氧氧化降解含酚废水的效能，对载体活性炭进行超声改性，并利用浸渍沉淀法制备Mn/AC催化剂，通过BET、SEM、EDS、XRD表征分析超声处理对其结构的影响，同时用苯酚模拟废水考察超声改性对其去除效能的影响。结果表明，超声改性起到清灰造孔作用，载体孔道增多，比表面积和孔体积增高，强化了负载，Mn的负载量由2.40%升至3.85%并以MnO₂形式存在，增大分散度；超声改性增强了催化剂的吸附及催化臭氧化能力，提高体系的吸附-催化臭氧氧化协同效应，Mn/U₆₀-AC+O₃体系在催化剂质量浓度为2 g/L、苯酚初始质量浓度为100 mg/L、温度为（25±1）℃、臭氧质量浓度为3 mg/L、气体通入流量为4 mL/min、pH=10、水体积为1 L的条件下反应24 min，苯酚的去除率高达99.64%，比Mn/AC+O₃体系提高了16%。

Activated carbon (AC) is firstly modified via ultrasound and then Mn/AC catalyst is synthesized by means of impregnation precipitation method,aiming to improve the degradation efficiency of phenol-containing wastewater by catalytic ozonation.Influences of ultrasound modification on catalyst structure are inspected through characterization of SEM,BET,EDS and XRD.Imitated phenol-containing wastewater is used to evaluate the potency of ultrasonic modification.Results illustrates that ultrasonic modification of AC carrier can play a role in cleaning and making hole,bringing the number of holes,surface area and pore volume to increase,which in turn enhances the load of Mn to increase from 2.40% to 3.85%.Mn,in the form of MnO₂,exists more uniformly on the carrier,implying an increase of dispersity.The adsorption and catalytic ozonation abilities of catalyst are also improved by ultrasound modification,and the synergy of adsorption-catalytic ozonation are improved too.The removal rate of phenol can reach as high as 99.64% when the wastewater has been treated for 24 h over Mn/U₆₀-AC under the conditions that the mass content of catalyst is 2 g·L^-1,the initial phenol concentration is 100 mg·L^-1,temperature is at 25±1℃,the concentration of ozone is 3 mg·L^-1,gas flow rate is set at 4 mL·min^-1,pH=10 and water volume is 1 L.The removal rate is 16 percentage higher than that over Mn/AC under the same conditions.

占小翠(1994-),女,硕士研究生,研究方向为催化臭氧氧化降解有机废水,zxc_94@126.com