Catalytic activities of zeolite compounds for decomposing aqueous ozone |
| |
| Authors: | Ai KUSUDA Mikito KITAYAMA Yoshio OHTA |
| |
| Institution: | 1. Division of Material Science and Production Engineering, Graduate school of Engineering, Fukuoka Institute of Technology, Fukuoka, 811-0295, Japan;2. Department of Life, Environment and Materials Science, Faculty of Engineering, Fukuoka Institute of Technology, Fukuoka, 811-0295, Japan;1. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;2. College of Chemical and Environmental Engineering, China University of Mining and Technology, Xueyuan Road 11, Beijing 100083, China;3. Department of Environmental Science and Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China;1. Tokai University, Fac. Eng., Material Science Department, Kitakaname 4-1-1, Hiratsuka 259-1292, Japan;2. Centre for Materials for Electronics Technology (C-MET), Department of Electronics and Information Technology, Kerala-680581, India;3. Energy Research Institute, CleanTech Loop, #05-08, CleanTech One, 637141 Singapore;4. Division of Inorganic and Physical Chemistry, Institut Teknologi Bandung, Jl. Ganesha no. 10 Bandung, 40132, Indonesia;1. Division of Inorganic and Physical Chemistry, Institut Teknologi Bandung, Jl. Ganesha No. 10, Bandung, 40132, Indonesia;2. Research Center for Nanosciences and Nanotechnology, Institut Teknologi Bandung, Jl. Ganesha No. 10, Bandung, 40132, Indonesia;3. School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia |
| |
| Abstract: | The advanced oxidation process (AOP), chemical oxidation using aqueous ozone in the presence of appropriate catalysts to generate highly reactive oxygen species, offers an attractive option for removing poorly biodegradable pollutants. Using the commercial zeolite powders with various Si/Al ratios and crystal structures, their catalytic activities for decomposing aqueous ozone were evaluated by continuously flowing ozone to water containing the zeolite powders. The hydrophilic zeolites (low Si/Al ratio) with alkali cations in the crystal structures were found to possess high catalytic activity for decomposing aqueous ozone. The hydrophobic zeolite compounds (high Si/Al ratio) were found to absorb ozone very well, but to have no catalytic activity for decomposing aqueous ozone. Their catalytic activities were also evaluated by using the fixed bed column method. When alkali cations were removed by acid rinsing or substituted by alkali-earth cations, the catalytic activities was significantly deteriorated. These results suggest that the metal cations on the crystal surface of the hydrophilic zeolite would play a key role for catalytic activity for decomposing aqueous ozone. |
| |
| Keywords: | ozone advanced oxidation process catalyst hydroxyl radical zeolite |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
