Photocatalytic degradation of 2,4-dichlorophenol in irradiated aqueous ZnO suspension.
This paper focuses on the destruction of aqueous 2,4-dichorophenol in ZnO suspension irradiated by low wattage UV light at 299 K. The operating variables studied include initial 2,4-dichlorophenol concentration, photocatalyst doses and pH. At 1.5 g l-1 feed concentration of ZnO and 50 mg l-1 initial...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English English |
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Canadian Center of Science and Education (CCSE)
2010
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| Online Access: | http://psasir.upm.edu.my/id/eprint/16185/1/Photocatalytic%20degradation%20of%202.pdf |
| _version_ | 1825945766890307584 |
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| author | Ibrahim Gaya, Umar Abdullah, Abdul Halim Zainal, Zulkarnain Hussein, Mohd. Zobir |
| author_facet | Ibrahim Gaya, Umar Abdullah, Abdul Halim Zainal, Zulkarnain Hussein, Mohd. Zobir |
| author_sort | Ibrahim Gaya, Umar |
| collection | UPM |
| description | This paper focuses on the destruction of aqueous 2,4-dichorophenol in ZnO suspension irradiated by low wattage UV light at 299 K. The operating variables studied include initial 2,4-dichlorophenol concentration, photocatalyst doses and pH. At 1.5 g l-1 feed concentration of ZnO and 50 mg l-1 initial 2,4-dichlorophenol level, a complete degradation was achieved in 180 min. The decomposition kinetics with respect to 2,4-dichlorophenol approximates pseudo zero-order with rate constant peaking at 0.38 mg l-1 min-1. High performance liquid chromatography (HPLC) and gas chromatography-mass spectrometry (GC-MS) detected benzoquinone, 2-chlorohydroquinone, 4-chlorophenol, 3,5-dichlorocatechol, hydroquinone, 4-hydroxybenzaldehyde and phenol during the ZnO-assisted photodegradation of 2,4-dichlorophenol among which some pathway products are disclosed for the first time. The reaction mechanism accounting for the degradation pathway intermediates is proposed. Inorganic anion additives such as S2O8 2-, SO4 2-, Cland HPO4 2- manifested inhibition against 2,4-dichlorophenol removal. |
| first_indexed | 2024-03-06T07:36:35Z |
| format | Article |
| id | upm.eprints-16185 |
| institution | Universiti Putra Malaysia |
| language | English English |
| last_indexed | 2024-03-06T07:36:35Z |
| publishDate | 2010 |
| publisher | Canadian Center of Science and Education (CCSE) |
| record_format | dspace |
| spelling | upm.eprints-161852015-09-28T02:28:35Z http://psasir.upm.edu.my/id/eprint/16185/ Photocatalytic degradation of 2,4-dichlorophenol in irradiated aqueous ZnO suspension. Ibrahim Gaya, Umar Abdullah, Abdul Halim Zainal, Zulkarnain Hussein, Mohd. Zobir This paper focuses on the destruction of aqueous 2,4-dichorophenol in ZnO suspension irradiated by low wattage UV light at 299 K. The operating variables studied include initial 2,4-dichlorophenol concentration, photocatalyst doses and pH. At 1.5 g l-1 feed concentration of ZnO and 50 mg l-1 initial 2,4-dichlorophenol level, a complete degradation was achieved in 180 min. The decomposition kinetics with respect to 2,4-dichlorophenol approximates pseudo zero-order with rate constant peaking at 0.38 mg l-1 min-1. High performance liquid chromatography (HPLC) and gas chromatography-mass spectrometry (GC-MS) detected benzoquinone, 2-chlorohydroquinone, 4-chlorophenol, 3,5-dichlorocatechol, hydroquinone, 4-hydroxybenzaldehyde and phenol during the ZnO-assisted photodegradation of 2,4-dichlorophenol among which some pathway products are disclosed for the first time. The reaction mechanism accounting for the degradation pathway intermediates is proposed. Inorganic anion additives such as S2O8 2-, SO4 2-, Cland HPO4 2- manifested inhibition against 2,4-dichlorophenol removal. Canadian Center of Science and Education (CCSE) 2010-02 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/16185/1/Photocatalytic%20degradation%20of%202.pdf Ibrahim Gaya, Umar and Abdullah, Abdul Halim and Zainal, Zulkarnain and Hussein, Mohd. Zobir (2010) Photocatalytic degradation of 2,4-dichlorophenol in irradiated aqueous ZnO suspension. International Journal of Chemistry, 2 (1 ). pp. 180-193. ISSN 1916-9698 English |
| spellingShingle | Ibrahim Gaya, Umar Abdullah, Abdul Halim Zainal, Zulkarnain Hussein, Mohd. Zobir Photocatalytic degradation of 2,4-dichlorophenol in irradiated aqueous ZnO suspension. |
| title | Photocatalytic degradation of 2,4-dichlorophenol in irradiated aqueous ZnO suspension. |
| title_full | Photocatalytic degradation of 2,4-dichlorophenol in irradiated aqueous ZnO suspension. |
| title_fullStr | Photocatalytic degradation of 2,4-dichlorophenol in irradiated aqueous ZnO suspension. |
| title_full_unstemmed | Photocatalytic degradation of 2,4-dichlorophenol in irradiated aqueous ZnO suspension. |
| title_short | Photocatalytic degradation of 2,4-dichlorophenol in irradiated aqueous ZnO suspension. |
| title_sort | photocatalytic degradation of 2 4 dichlorophenol in irradiated aqueous zno suspension |
| url | http://psasir.upm.edu.my/id/eprint/16185/1/Photocatalytic%20degradation%20of%202.pdf |
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