Abstract:

Mn²⁺ - MnO₂ catalysts are used for catalytic ozonation of oxytetracycli ne wastewater. The influential factors, such as different pH values, the optimum ratio and the amount of catalyst, the flow of ozone,and the radical depressant have been discussed. The results show that, After using Mn²⁺ - MnO₂ catalysts,t he removal rate of COD_Cr<\sub> could reach 70.8% from 35.3% by using ozone only. At th e same time, it is indicated that HO· is the main factor in catalytic ozonation_.

Key words: catalytic oxidation, ozone, oxytetracycline wastewater

摘要：

采用Mn²⁺-MnO₂催化臭氧氧化降解土霉素废水,考察了pH值、臭氧流量、催化剂配比及投加量、自由基抑制剂等因素对降解效果的影响。结果表明:Mn²⁺-MnO₂催化剂的使用,可使废水COD_Cr<\sub>去除率由单独臭氧氧化的35.3%提高到70.8%,同时还证实了催化臭氧氧化降解土霉素废水主要是自由基的氧化作用。

关键词: 催化氧化, 臭氧, 土霉素废水

CLC Number: 

• X787

• X703