催化臭氧化处理抗生素废水催化剂的制备

Preparation of the Catalyst for Antibiotic Wastewater Treatment by Catalytic Ozonation

采用浸渍法制备催化剂,考察了活性组分、载体种类、浸渍液金属离子含量及配比、焙烧温度和时间等因素对催化剂活性的影响,以筛选出活性较高的催化剂,并对催化剂进行了表征。结果表明,在浸渍液Cu^(2+)浓度1.25mol/L,Fe^(3+)、Cu^(2+)浓度比为1:1,焙烧温度500℃、时间5 h条件下制备具有较高的活性的Cu O-Fe_2O_3/γ-Al_2O_3催化剂,连续7次循环使用后,COD去除率稳定,可达44%以上,且铁铜离子量浸出较少,证明其具有良好的稳定性。在优化条件下制备的Cu O-Fe_2O_3/γ-Al_2O_3,与载体γ-Al_2O_3相比,催化剂比表面积、孔容有所减少,孔径增加,负载的活性组分Cu O、Fe_2O_3的质量分数分别为9.676%、10.84%。

The catalyst was prepared by impregnation method,and the effect of active component,carrier species,metal ion content and ratio of impregnation liquid,calcination temperature and time on catalyst activity was researched.The catalyst with higher activity was screened out,and the catalyst was characterized.The results showed that,Cu O-Fe2O3/γ-Al2O3catalyst with higher activity was prepared,when Cu^2＋concentration of impregnation liquid,concentration ratio of Fe^3＋to Cu^2＋,calcination temperature and time was 1.25 mol/L,1：1,500℃and 5 h respectively.After 7 successive recycled,COD removal rate was stable and could reach above 44%,and leaching of iron and cupper ions was less,which indicated that the stability of the catalyst was good.The Cu O-Fe2O3/γ-Al2O3catalyst which prepared under the optimal condition had smaller specific surface area and pore volume,bigger pore diameter compared toγ-Al2O3,and the mass fraction of supported active component Cu O and Fe2O3was 9.676%and 10.84%respectively.