Decolorization of dark brown colored coffee effluent by solar photo-Fenton reaction: Effect of solar light dose on decolorization kinetics
The decolorization of dark brown colored coffee effluent by solar photo-Fenton process has been studied. Effects of accumulated solar light energy and dosage of Fenton reagents (iron and hydrogen peroxide) on the color removal have been examined. With increasing Fe dosage the rate of the decolorizat...
| Main Authors: | , , |
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| Format: | Journal Article |
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IWA Publishing
2008
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| Online Access: | http://hdl.handle.net/20.500.11937/32302 |
| _version_ | 1848753624094605312 |
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| author | Tokumura, M. Znad, Hussein Kawase, Y. |
| author_facet | Tokumura, M. Znad, Hussein Kawase, Y. |
| author_sort | Tokumura, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The decolorization of dark brown colored coffee effluent by solar photo-Fenton process has been studied. Effects of accumulated solar light energy and dosage of Fenton reagents (iron and hydrogen peroxide) on the color removal have been examined. With increasing Fe dosage the rate of the decolorization increased but the enhancement was not pronounced beyond 10 mg L-1. Although addition of H2O2 increased the decolorization rate up to around 1000 mg L-1 of H2O2, further addition of H2O2 could not enhance the color removal. At excess dosages of Fenton reagents, the color removal was not improved due to their scavenging of hydroxyl radicals. It was found that the pseudo-first order decolorization kinetic constant based on the accumulated solar energy is a sole parameter unifying solar photo-Fenton decolorization processes under the different weather conditions. The kinetic constant can be readily used to calculate the amount of solar energy required to achieve a certain degree of color removal. The mineralization was rather slower as compared with the decolorization. The decolorization capability with solar irradiation was found to be comparable to UV light irradiation. The present results suggest that abundant solar energy driving decolorization of coffee effluent by photo-Fenton reaction is highly efficient. © 2008 Elsevier Ltd. All rights reserved. |
| first_indexed | 2025-11-14T08:27:28Z |
| format | Journal Article |
| id | curtin-20.500.11937-32302 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:27:28Z |
| publishDate | 2008 |
| publisher | IWA Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-323022017-09-13T15:24:47Z Decolorization of dark brown colored coffee effluent by solar photo-Fenton reaction: Effect of solar light dose on decolorization kinetics Tokumura, M. Znad, Hussein Kawase, Y. The decolorization of dark brown colored coffee effluent by solar photo-Fenton process has been studied. Effects of accumulated solar light energy and dosage of Fenton reagents (iron and hydrogen peroxide) on the color removal have been examined. With increasing Fe dosage the rate of the decolorization increased but the enhancement was not pronounced beyond 10 mg L-1. Although addition of H2O2 increased the decolorization rate up to around 1000 mg L-1 of H2O2, further addition of H2O2 could not enhance the color removal. At excess dosages of Fenton reagents, the color removal was not improved due to their scavenging of hydroxyl radicals. It was found that the pseudo-first order decolorization kinetic constant based on the accumulated solar energy is a sole parameter unifying solar photo-Fenton decolorization processes under the different weather conditions. The kinetic constant can be readily used to calculate the amount of solar energy required to achieve a certain degree of color removal. The mineralization was rather slower as compared with the decolorization. The decolorization capability with solar irradiation was found to be comparable to UV light irradiation. The present results suggest that abundant solar energy driving decolorization of coffee effluent by photo-Fenton reaction is highly efficient. © 2008 Elsevier Ltd. All rights reserved. 2008 Journal Article http://hdl.handle.net/20.500.11937/32302 10.1016/j.watres.2008.08.007 IWA Publishing restricted |
| spellingShingle | Tokumura, M. Znad, Hussein Kawase, Y. Decolorization of dark brown colored coffee effluent by solar photo-Fenton reaction: Effect of solar light dose on decolorization kinetics |
| title | Decolorization of dark brown colored coffee effluent by solar photo-Fenton reaction: Effect of solar light dose on decolorization kinetics |
| title_full | Decolorization of dark brown colored coffee effluent by solar photo-Fenton reaction: Effect of solar light dose on decolorization kinetics |
| title_fullStr | Decolorization of dark brown colored coffee effluent by solar photo-Fenton reaction: Effect of solar light dose on decolorization kinetics |
| title_full_unstemmed | Decolorization of dark brown colored coffee effluent by solar photo-Fenton reaction: Effect of solar light dose on decolorization kinetics |
| title_short | Decolorization of dark brown colored coffee effluent by solar photo-Fenton reaction: Effect of solar light dose on decolorization kinetics |
| title_sort | decolorization of dark brown colored coffee effluent by solar photo-fenton reaction: effect of solar light dose on decolorization kinetics |
| url | http://hdl.handle.net/20.500.11937/32302 |