Solar photocatalytic degradation of chlorophenols mixture (4-CP and 2,4-DCP): Mechanism and kinetic modelling
The solar-photocatalytic degradation mechanisms and kinetics of 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP) using TiO2 have been investigated both individually and combined. The individual solar-photocatalytic degradation of both phenolic compounds showed that the reaction rates follow ps...
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| Format: | Journal Article |
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Taylor & Francis Group
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/40513 |
| _version_ | 1848755891606650880 |
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| author | Abeish, Abdul Basit Mohamad S Ang, Ming Znad, Hussein |
| author_facet | Abeish, Abdul Basit Mohamad S Ang, Ming Znad, Hussein |
| author_sort | Abeish, Abdul Basit Mohamad S |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The solar-photocatalytic degradation mechanisms and kinetics of 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP) using TiO2 have been investigated both individually and combined. The individual solar-photocatalytic degradation of both phenolic compounds showed that the reaction rates follow pseudo–first-order reaction. During the individual photocatalytic degradation of both 4-CP and 2,4-DCP under the same condition of TiO2 (0.5 g L¡1) and light intensities (1000 mW cm-2) different intermediates were detected, three compounds associated with 4-CP (hydroquinone (HQ), phenol (Ph) and 4-chlorocatechol (4-cCat)) and two compounds associated with 2,4-DCP (4-CP and Ph). The photocatalytic degradation of the combined mixture (4-CP and 2,4-DCP) was also investigated at the same conditions and different 2,4-DCP initial concentrations. The results showed that the degradation rate of 4-CP decreases when the 2,4-DCP concentration increases. Furthermore, the intermediates detected were similar to that found in the individual degradation but with high Ph concentration. Therefore, a possible reaction mechanism for degradation of this combined mixture was proposed. Moreover, a modified Langmuir–Hinshelwood (L-H) kinetic model considering all detected intermediates was developed. A good agreement between experimental and estimated results was achieved. This model can be useful for scaling-up purposes more accurately as its considering the intermediates formed, which has a significant effect on degrading the main pollutants (4-CP and 2,4-DCP). |
| first_indexed | 2025-11-14T09:03:31Z |
| format | Journal Article |
| id | curtin-20.500.11937-40513 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:03:31Z |
| publishDate | 2015 |
| publisher | Taylor & Francis Group |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-405132017-09-13T14:08:48Z Solar photocatalytic degradation of chlorophenols mixture (4-CP and 2,4-DCP): Mechanism and kinetic modelling Abeish, Abdul Basit Mohamad S Ang, Ming Znad, Hussein 4-DCP 2 degradation chlorophenols mixture solar photocatalytic mechanism 4-CP kinetic modelling The solar-photocatalytic degradation mechanisms and kinetics of 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP) using TiO2 have been investigated both individually and combined. The individual solar-photocatalytic degradation of both phenolic compounds showed that the reaction rates follow pseudo–first-order reaction. During the individual photocatalytic degradation of both 4-CP and 2,4-DCP under the same condition of TiO2 (0.5 g L¡1) and light intensities (1000 mW cm-2) different intermediates were detected, three compounds associated with 4-CP (hydroquinone (HQ), phenol (Ph) and 4-chlorocatechol (4-cCat)) and two compounds associated with 2,4-DCP (4-CP and Ph). The photocatalytic degradation of the combined mixture (4-CP and 2,4-DCP) was also investigated at the same conditions and different 2,4-DCP initial concentrations. The results showed that the degradation rate of 4-CP decreases when the 2,4-DCP concentration increases. Furthermore, the intermediates detected were similar to that found in the individual degradation but with high Ph concentration. Therefore, a possible reaction mechanism for degradation of this combined mixture was proposed. Moreover, a modified Langmuir–Hinshelwood (L-H) kinetic model considering all detected intermediates was developed. A good agreement between experimental and estimated results was achieved. This model can be useful for scaling-up purposes more accurately as its considering the intermediates formed, which has a significant effect on degrading the main pollutants (4-CP and 2,4-DCP). 2015 Journal Article http://hdl.handle.net/20.500.11937/40513 10.1080/10934529.2015.975045 Taylor & Francis Group restricted |
| spellingShingle | 4-DCP 2 degradation chlorophenols mixture solar photocatalytic mechanism 4-CP kinetic modelling Abeish, Abdul Basit Mohamad S Ang, Ming Znad, Hussein Solar photocatalytic degradation of chlorophenols mixture (4-CP and 2,4-DCP): Mechanism and kinetic modelling |
| title | Solar photocatalytic degradation of chlorophenols mixture (4-CP and 2,4-DCP): Mechanism and kinetic modelling |
| title_full | Solar photocatalytic degradation of chlorophenols mixture (4-CP and 2,4-DCP): Mechanism and kinetic modelling |
| title_fullStr | Solar photocatalytic degradation of chlorophenols mixture (4-CP and 2,4-DCP): Mechanism and kinetic modelling |
| title_full_unstemmed | Solar photocatalytic degradation of chlorophenols mixture (4-CP and 2,4-DCP): Mechanism and kinetic modelling |
| title_short | Solar photocatalytic degradation of chlorophenols mixture (4-CP and 2,4-DCP): Mechanism and kinetic modelling |
| title_sort | solar photocatalytic degradation of chlorophenols mixture (4-cp and 2,4-dcp): mechanism and kinetic modelling |
| topic | 4-DCP 2 degradation chlorophenols mixture solar photocatalytic mechanism 4-CP kinetic modelling |
| url | http://hdl.handle.net/20.500.11937/40513 |