化工进展 ›› 2018, Vol. 37 ›› Issue (06): 2399-2405.DOI: 10.16085/j.issn.1000-6613.2017-1466

• 资源与环境化工 • 上一篇    下一篇

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

杨文玲1,2, 郜子兴1, 吴赳1, 王妨茶1   

  1. 1 河北科技大学化学与制药工程学院, 河北 石家庄 050018;
    2 天津大学化工学院, 天津 300350
  • 收稿日期:2017-07-17 修回日期:2017-08-03 出版日期:2018-06-05 发布日期:2018-06-05
  • 通讯作者: 杨文玲(1971-),女,教授,博士,主要研究方向为化工分离、环境化工。
  • 作者简介:杨文玲(1971-),女,教授,博士,主要研究方向为化工分离、环境化工。E-mail:yangwl@hebust.edu.cn。
  • 基金资助:
    河北省科技支撑计划项目(17273602D)。

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

YANG Wenling1,2, GAO Zixing1, WU Jiu1, WANG Fangcha1   

  1. 1 School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei, China;
    2 School of Chemical Engineering and Technolgy, Tianjin University, Tianjin 300350, China
  • Received:2017-07-17 Revised:2017-08-03 Online:2018-06-05 Published:2018-06-05

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-Fe2O3/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

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