Photooxidation Contribution Study on the Decomposition of Azo Dyes in Aqueous Solutions by VUV-Based AOPs
The effects of pH value, VUV intensity, initial dye concentration, initial H2O2 concentration, and TiO2 loading dose on the degradation of three azo dyes: acid Orange 8, acid Blue 29, and acid Blue 113 were studied to explore and compare the treatment efficiencies among the adopted AOPs. It was foun...
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| Format: | Article |
| Language: | English |
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Wiley
2011-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2011/156456 |
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| author | Chih-Ming Ma Gui-Bing Hong Hua-Wei Chen Nguyen-Thi Hang Yung-Shuen Shen |
| author_facet | Chih-Ming Ma Gui-Bing Hong Hua-Wei Chen Nguyen-Thi Hang Yung-Shuen Shen |
| author_sort | Chih-Ming Ma |
| collection | DOAJ |
| description | The effects of pH value, VUV intensity, initial dye concentration, initial H2O2 concentration, and TiO2 loading dose on the degradation of three azo dyes: acid Orange 8, acid Blue 29, and acid Blue 113 were studied to explore and compare the treatment efficiencies among the adopted AOPs. It was found that pH played an important role in the degradation of dyes using VUV irradiation. For VUV/H2O2, VUV/TiO2, and VUV/TiO2/H2O2 processes, the decoloration rates of the three azo dyes were more efficient under acidic conditions relative to alkaline conditions. The degradation rates of dyes increased with increasing concentrations of H2O2, but reaction rates were retarded at high concentrations of H2O2 because the H2O2 compound acted as a scavenger of the hydroxyl radical. In this paper, three azo dyes were decomposed efficiently by VUV irradiation only demonstrating the effectiveness of VUV direct photolysis. |
| format | Article |
| id | doaj-art-fb845a6a7b884c32a00fba91ab5b45b1 |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-fb845a6a7b884c32a00fba91ab5b45b12025-02-03T01:09:41ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2011-01-01201110.1155/2011/156456156456Photooxidation Contribution Study on the Decomposition of Azo Dyes in Aqueous Solutions by VUV-Based AOPsChih-Ming Ma0Gui-Bing Hong1Hua-Wei Chen2Nguyen-Thi Hang3Yung-Shuen Shen4Department of Cosmetic Application and Management, St. Mary's Medicine Nursing and Management College, No. 100, Lane 265, San-Shing Road, Sec. 2, San-Shing Shiang, Yi-Lan 266, TaiwanDepartment of Cosmetic Application and Management, St. Mary's Medicine Nursing and Management College, No. 100, Lane 265, San-Shing Road, Sec. 2, San-Shing Shiang, Yi-Lan 266, TaiwanDepartment of Cosmetic Application and Management, St. Mary's Medicine Nursing and Management College, No. 100, Lane 265, San-Shing Road, Sec. 2, San-Shing Shiang, Yi-Lan 266, TaiwanDepartment of Environmental Engineering, Da-Yeh University, No. 168, University Road, Dacun, Changhua 512, TaiwanHolistic Education Center, Mackay Medical College, No. 46, Sec. 3, Jhong-Jheng Road, San-Jhih, Taipei City 252, TaiwanThe effects of pH value, VUV intensity, initial dye concentration, initial H2O2 concentration, and TiO2 loading dose on the degradation of three azo dyes: acid Orange 8, acid Blue 29, and acid Blue 113 were studied to explore and compare the treatment efficiencies among the adopted AOPs. It was found that pH played an important role in the degradation of dyes using VUV irradiation. For VUV/H2O2, VUV/TiO2, and VUV/TiO2/H2O2 processes, the decoloration rates of the three azo dyes were more efficient under acidic conditions relative to alkaline conditions. The degradation rates of dyes increased with increasing concentrations of H2O2, but reaction rates were retarded at high concentrations of H2O2 because the H2O2 compound acted as a scavenger of the hydroxyl radical. In this paper, three azo dyes were decomposed efficiently by VUV irradiation only demonstrating the effectiveness of VUV direct photolysis.http://dx.doi.org/10.1155/2011/156456 |
| spellingShingle | Chih-Ming Ma Gui-Bing Hong Hua-Wei Chen Nguyen-Thi Hang Yung-Shuen Shen Photooxidation Contribution Study on the Decomposition of Azo Dyes in Aqueous Solutions by VUV-Based AOPs International Journal of Photoenergy |
| title | Photooxidation Contribution Study on the Decomposition of Azo Dyes in Aqueous Solutions by VUV-Based AOPs |
| title_full | Photooxidation Contribution Study on the Decomposition of Azo Dyes in Aqueous Solutions by VUV-Based AOPs |
| title_fullStr | Photooxidation Contribution Study on the Decomposition of Azo Dyes in Aqueous Solutions by VUV-Based AOPs |
| title_full_unstemmed | Photooxidation Contribution Study on the Decomposition of Azo Dyes in Aqueous Solutions by VUV-Based AOPs |
| title_short | Photooxidation Contribution Study on the Decomposition of Azo Dyes in Aqueous Solutions by VUV-Based AOPs |
| title_sort | photooxidation contribution study on the decomposition of azo dyes in aqueous solutions by vuv based aops |
| url | http://dx.doi.org/10.1155/2011/156456 |
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