Efeitos dos parâmetros operacionais na fotodegradação do azo corante direct red 23 na interface dióxido de titânio/água Effects of operational parameters on the photodegradation of direct red 23 azo dye at the titanium dioxide/water interface
<abstract language="eng">The decolorization and degradation of direct red 23 azo dye have been investigated in aqueous suspension of titanium dioxide under artificial irradiation. The effects of some operational parameters such as azo dye concentration, catalyst loading, and solution...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2007-01-01
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| Series: | Química Nova |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000800019 |
| _version_ | 1819315541675868160 |
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| author | Débora Nobile Clausen Keiko Takashima |
| author_facet | Débora Nobile Clausen Keiko Takashima |
| author_sort | Débora Nobile Clausen |
| collection | DOAJ |
| description | <abstract language="eng">The decolorization and degradation of direct red 23 azo dye have been investigated in aqueous suspension of titanium dioxide under artificial irradiation. The effects of some operational parameters such as azo dye concentration, catalyst loading, and solution pH were investigated at 30.0 ºC and optimized values were obtained. The first-order kinetic model was used to discuss the results. The UV-Vis spectra changes showed that the azo dye sample, collected after 6 h irradiation, was 98% decolorized while the residual total carbon was 97.9% degraded, indicating simultaneous photodecolorization and degradation. |
| first_indexed | 2024-12-24T10:01:45Z |
| format | Article |
| id | doaj.art-d54ec0d4f0bc47d6b55dacfd6f877cd7 |
| institution | Directory Open Access Journal |
| issn | 0100-4042 1678-7064 |
| language | English |
| last_indexed | 2024-12-24T10:01:45Z |
| publishDate | 2007-01-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Química Nova |
| spelling | doaj.art-d54ec0d4f0bc47d6b55dacfd6f877cd72022-12-21T17:01:01ZengSociedade Brasileira de QuímicaQuímica Nova0100-40421678-70642007-01-013081896189910.1590/S0100-40422007000800019Efeitos dos parâmetros operacionais na fotodegradação do azo corante direct red 23 na interface dióxido de titânio/água Effects of operational parameters on the photodegradation of direct red 23 azo dye at the titanium dioxide/water interfaceDébora Nobile ClausenKeiko Takashima<abstract language="eng">The decolorization and degradation of direct red 23 azo dye have been investigated in aqueous suspension of titanium dioxide under artificial irradiation. The effects of some operational parameters such as azo dye concentration, catalyst loading, and solution pH were investigated at 30.0 ºC and optimized values were obtained. The first-order kinetic model was used to discuss the results. The UV-Vis spectra changes showed that the azo dye sample, collected after 6 h irradiation, was 98% decolorized while the residual total carbon was 97.9% degraded, indicating simultaneous photodecolorization and degradation.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000800019photocatalysisdiazo dyetitanium dioxide |
| spellingShingle | Débora Nobile Clausen Keiko Takashima Efeitos dos parâmetros operacionais na fotodegradação do azo corante direct red 23 na interface dióxido de titânio/água Effects of operational parameters on the photodegradation of direct red 23 azo dye at the titanium dioxide/water interface Química Nova photocatalysis diazo dye titanium dioxide |
| title | Efeitos dos parâmetros operacionais na fotodegradação do azo corante direct red 23 na interface dióxido de titânio/água Effects of operational parameters on the photodegradation of direct red 23 azo dye at the titanium dioxide/water interface |
| title_full | Efeitos dos parâmetros operacionais na fotodegradação do azo corante direct red 23 na interface dióxido de titânio/água Effects of operational parameters on the photodegradation of direct red 23 azo dye at the titanium dioxide/water interface |
| title_fullStr | Efeitos dos parâmetros operacionais na fotodegradação do azo corante direct red 23 na interface dióxido de titânio/água Effects of operational parameters on the photodegradation of direct red 23 azo dye at the titanium dioxide/water interface |
| title_full_unstemmed | Efeitos dos parâmetros operacionais na fotodegradação do azo corante direct red 23 na interface dióxido de titânio/água Effects of operational parameters on the photodegradation of direct red 23 azo dye at the titanium dioxide/water interface |
| title_short | Efeitos dos parâmetros operacionais na fotodegradação do azo corante direct red 23 na interface dióxido de titânio/água Effects of operational parameters on the photodegradation of direct red 23 azo dye at the titanium dioxide/water interface |
| title_sort | efeitos dos parametros operacionais na fotodegradacao do azo corante direct red 23 na interface dioxido de titanio agua effects of operational parameters on the photodegradation of direct red 23 azo dye at the titanium dioxide water interface |
| topic | photocatalysis diazo dye titanium dioxide |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000800019 |
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