CuO-Fe2O3/γ-Al2O3/H2O2/O3催化氧化深度处理制药二级生化出水

doi:10.16085/j.issn.1000-6613.2017-1466

摘要/Abstract

摘要： 采用浸渍法将CuO、Fe₂O₃负载在γ-Al₂O₃表面，制备高活性臭氧催化氧化催化剂，通过N₂吸附脱附曲线，X射线衍射、扫描电镜、X射线荧光光谱等方法对催化剂性能进行表征。与CuO-Fe₂O₃/γ-Al₂O₃/O₃、H₂O₂/O₃、γ-Al₂O₃/O₃等工艺相比，采用CuO-Fe₂O_3/γ-Al₂O₃/H₂O₂/O₃工艺降解制药二级生化出水效果最为明显，较高的催化氧化效率主要归功于H₂O₂的诱导作用和催化剂的催化作用的双重作用加速臭氧生成更多·OH。考察废水中COD去除率及影响降解的因素，包括催化剂投加量、pH、双氧水投加量、臭氧流量等，实验结果显示在催化剂投加量2g/L、废水pH为9、双氧水投加量3.6mg/L、臭氧流量1.0L/min条件下，COD去除率达到62.96%。催化剂循环使用10次后，COD去除率仍然可达到58%以上，并且金属离子浸出较少，其结构稳定。通过自由基捕获剂测试，探讨该催化氧化过程遵循自由基反应机理。

关键词: 臭氧催化氧化, 催化剂废水, 降解, 自由基

Abstract: A high activity ozone catalytic oxidation catalyst had been prepared by using impregnation method to load CuO,Fe₂O₃ onto the surface of γ-Al₂O₃. The catalyst was characterized by nitrogen adsorption desorption isotherms,X-ray powder diffraction,scanning electron microscopy,X-ray fluorescence. Compared with CuO-Fe₂O₃/γ-Al₂O₃/O₃,H₂O₂/O₃ and γ-Al₂O₃/O₃ technologies,it was proved that the. The effect was the most obvious on the degradation of secondary biochemical effluent by CuO-Fe₂O₃/γ-Al₂O₃/H₂O₂/O₃technology. The dual role of H₂O₂induction and the catalytic action of the catalyst speeded up the decomposition of ozone and more ·OH with higher oxidation ability was generated. The COD removal and the influencing factors of degradation effect were analyzed,such as catalyst dosage,pH,H₂O₂dosage and ozone flow rate. The results showed that the COD removal rate was 62.96% when catalyst dosage was 2g/L,pH=9,H₂O₂dosage 3.6mg/L,and ozone flow rate 1.0L/min. The COD removal rate could still reach more than 58%,after 10 consecutive cycles of the catalyst. The leaching of metal iron were very few and the structure of the catalyst was stable. It was deduced that the enhancement of catalytic activity was responsible for generating more radicals by radical scavenger detection.

Key words: ozone catalytic oxidation, catalyst, wastewater, degradation, radical

中图分类号:

X703

杨文玲, 郜子兴, 吴赳, 王妨茶. CuO-Fe₂O₃/γ-Al₂O₃/H₂O₂/O₃催化氧化深度处理制药二级生化出水[J]. 化工进展, 2018, 37(06): 2399-2405.

YANG Wenling, GAO Zixing, WU Jiu, WANG Fangcha. Advanced treatment of secondary biochemical effluent by CuO-Fe₂O₃/γ-Al₂O₃/H₂O₂/O₃[J]. Chemical Industry and Engineering Progress, 2018, 37(06): 2399-2405.

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CuO-Fe₂O₃/γ-Al₂O₃/H₂O₂/O₃催化氧化深度处理制药二级生化出水

Advanced treatment of secondary biochemical effluent by CuO-Fe₂O₃/γ-Al₂O₃/H₂O₂/O₃

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