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臭氧光催化降解水中甲醛的研究

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卢敬霞, 张彭义, 何为军. 臭氧光催化降解水中甲醛的研究[J]. 环境工程学报, 2010, 4(1): 27-30.
引用本文: 卢敬霞, 张彭义, 何为军. 臭氧光催化降解水中甲醛的研究[J]. 环境工程学报, 2010, 4(1): 27-30.
shu
Lu Jingxia1，2, Zhang Pengyi1, He Weijun2. Research on degradation of formaldehyde in aqueous solution by combined photocatalysis and ozonation[J]. Chinese Journal of Environmental Engineering, 2010, 4(1): 27-30.
Citation: Lu Jingxia1，2, Zhang Pengyi1, He Weijun2. Research on degradation of formaldehyde in aqueous solution by combined photocatalysis and ozonation[J]. Chinese Journal of Environmental Engineering, 2010, 4(1): 27-30.
shu

臭氧光催化降解水中甲醛的研究

  • 1.

    清华大学环境科学与工程系，北京 100084

  • 2.

    中国矿业大学（北京）化学与环境工程学院，北京 100083

  • 基金项目:

    国家“863”高技术研究发展计划项目（2006AA06Z377）

  • 中图分类号: X703.1

Research on degradation of formaldehyde in aqueous solution by combined photocatalysis and ozonation

  • 1.

    Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084,China

  • 2.

    School of Chemical and Environmental Engineering, China University of Mining & Technology, Beijing, Beijing 100083,China

  • Fund Project:

  • 摘要: 研究比较了3种光化学方法对水中低浓度甲醛的降解效果，考察了初始pH值、甲醛浓度和臭氧投加速率等因素对臭氧光催化（TiO2/UV/O3/sub>）降解甲醛的影响。结果表明，紫外臭氧(UV/O3)、光催化(TiO2/UV)和TiO2/UV/O3对甲醛的降解均符合表观一级反应动力学，TiO2/UV/O3降解甲醛的一级表观速率常数大于TiO2
    Abstract: The degradation effects of low concentration formaldehyde in aqueous solution by three photochemical methods（UV/O3,TiO2/UV，TiO2/UV/O3） were compared, and the effects of initial pH, formaldehyde concentration and ozone addition rate on the formaldehyde degradation by TiO2/UV/O3 were studied. The results show that the degradations of formaldehyde in the three processesUV/O3 TiO2/UV,TiO2/UV/O3, follow the apparent firstorder reaction kinetics. The rate constant of TiO2/UV/O3 is larger than sum of those of TiO2/UV and UV/O3, which indicates a synergistic effect of photocatalysis and ozonation. The effect of pH on formaldehyde degradation by TiO2/UV/O3 can be ignored. The rate constant decreases with the increase of initial concentration of formaldehyde, while the absolute removal amount of formaldehyde increases with the increase of its initial concentration. The rate constant increases with the increase of ozone addition rate. Formic acid is identified as the main intermediate product during formaldehyde degradation; however, formic acid is quickly degraded and mineralized during the reaction, indicating that TiO2/UV/O3 is a safe and effective method to remove formaldehyde.
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  • 收稿日期:  2009-03-28
卢敬霞, 张彭义, 何为军. 臭氧光催化降解水中甲醛的研究[J]. 环境工程学报, 2010, 4(1): 27-30.
引用本文: 卢敬霞, 张彭义, 何为军. 臭氧光催化降解水中甲醛的研究[J]. 环境工程学报, 2010, 4(1): 27-30.
shu
Lu Jingxia1，2, Zhang Pengyi1, He Weijun2. Research on degradation of formaldehyde in aqueous solution by combined photocatalysis and ozonation[J]. Chinese Journal of Environmental Engineering, 2010, 4(1): 27-30.
Citation: Lu Jingxia1，2, Zhang Pengyi1, He Weijun2. Research on degradation of formaldehyde in aqueous solution by combined photocatalysis and ozonation[J]. Chinese Journal of Environmental Engineering, 2010, 4(1): 27-30.
shu

臭氧光催化降解水中甲醛的研究

  • 1. 清华大学环境科学与工程系，北京 100084
  • 2. 中国矿业大学（北京）化学与环境工程学院，北京 100083
  • 收稿日期:  2009-03-28
基金项目:

国家“863”高技术研究发展计划项目（2006AA06Z377）

摘要: 研究比较了3种光化学方法对水中低浓度甲醛的降解效果，考察了初始pH值、甲醛浓度和臭氧投加速率等因素对臭氧光催化（TiO2/UV/O3/sub>）降解甲醛的影响。结果表明，紫外臭氧(UV/O3)、光催化(TiO2/UV)和TiO2/UV/O3对甲醛的降解均符合表观一级反应动力学，TiO2/UV/O3降解甲醛的一级表观速率常数大于TiO2

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