標題: Catalytic decomposition of hydrogen peroxide and 2-chlorophenol with iron oxides
作者: Huang, HH
Lu, MC
Chen, JN
環境工程研究所
Institute of Environmental Engineering
關鍵字: hydrogen peroxide;iron oxides;heterogeneous catalysis;Fenton-like reaction;2-chlorophenol;diffusion
公開日期: 1-Jun-2001
摘要: The aim of this study was to examine the catalyzed decomposition of hydrogen peroxide and 2-chlorophenol (2-CP) in the presence of iron oxides. C;ranular ferrihydrite, goethite, and hematite were selected as catalysts in this study. 2-CP was used as the model compound because it is a typical toxic compound and has not been investigated in the catalytic decomposition by iron oxides. The catalytic activity for hydrogen peroxide decomposition followed the sequence: granular ferrihydrite > goethite > hematite. However, hematite exhibited the highest activity in catalyzing 2-CP oxidation. The oxidation efficiency of 2-CP corresponded with the inverse sequence of specific area and pH,,, of the iron oxides. The catalytic activity of granular ferrihydrite was affected significantly by the mixing speed and particle size for its large value of Thiele modulus (phi) and Damkohler number (Da). The strong diffusion resistance for granular ferrihydrite was attributed either to its microporous structure or to the formation of oxygen in the pores of the iron oxide leading to the unexpected catalytic activity of granular ferrihydrite to hydrogen peroxide and 2-CP. (C) 2001 Elsevier Science Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/S0043-1354(00)00496-6
http://hdl.handle.net/11536/29600
ISSN: 0043-1354
DOI: 10.1016/S0043-1354(00)00496-6
期刊: WATER RESEARCH
Volume: 35
Issue: 9
起始頁: 2291
結束頁: 2299
Appears in Collections:Articles


Files in This Item:

  1. 000168558400023.pdf