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| 臭氧光催化降解水中甲醛的研究 | |
| 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. |
| 作者姓名： | 卢敬霞 张彭义 何为军 |
| 作者单位： | 1. 清华大学环境科学与工程系,北京,100084;中国矿业大学(北京)化学与环境工程学院,北京,100083 2. 清华大学环境科学与工程系,北京,100084 3. 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） |
| 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(TiO_2/UV/O_3)降解甲醛的影响。结果表明,紫外臭氧(UV/O_3)、光催化(TiO_2/UV)和TiO_2/UV/O_3对甲醛的降解均符合表观一级反应动力学,TiO_2/UV/O_3降解甲醛的一级表观速率常数大于TiO_2/UV与UV/O_3之和,说明臭氧、光催化有明显的协同作用。pH值对臭氧光催化降解甲醛的速率几乎没有影响;甲醛初始浓度增加,表观反应速率常数下降,但甲醛的绝对去除量仍随初始浓度的增加而显著增加;臭氧投加速率增加,降解速率增加。甲醛降解的主要中间产物为甲酸,但甲酸在臭氧光催化反应过程中也快速降解而被矿化,说明臭氧光催化是一种能安全有效去除甲醛的方法。 |
| 关 键 词： | 臭氧光催化 甲醛 室内空气 空气净化器 |
| 收稿时间： | 3/1/2009 12:00:00 AM |
Research on degradation of formaldehyde in aqueous solution by combined photocatalysis and ozonation |
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| Lu Jingxi,Zhang Pengyi and He Weijun.Research on degradation of formaldehyde in aqueous solution by combined photocatalysis and ozonation[J].Techniques and Equipment for Environmental Pollution Control,2010,4(1):27-30. | |
| Authors: | Lu Jingxi Zhang Pengyi and He Weijun |
| Institution: | 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,1. Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084,China and 2.School of Chemical and Environmental Engineering, China University of Mining & Technology, Beijing, Beijing 100083,China |
| Abstract: | The degradation effects of low concentration formaldehyde in aqueous solution by three photochemical methods(UV/O_3,TiO_2/UV,TiO_2/UV/O_3) were compared,and the effects of initial pH,formaldehyde concentration and ozone addition rate on the formaldehyde degradation by TiO_2/UV/O_3 were studied.The results show that the degradations of formaldehyde in the three processes-UV/O_3 TiO_2/UV,TiO_2/UV/O_3,follow the apparent first-order reaction kinetics.The rate constant of TiO_2/UV/O_3 is larger than sum of thos... |
| Keywords: | combined photocatalysis and ozonation formaldehyde indoor air air purifier |
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