Photocatalytic Degradation of Azo Dye Reactive Violet 5 on Fe-Doped Titania Catalysts under Visible Light Irradiation
The presence of azo dyes in textile effluents is an issue of major concern due to their potential impact on the environment and human health. In this study we investigate the photocatalytic degradation under visible light of Reactive Violet 5 (RV5), an azo dye widely used in the textile industry. A...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-07-01
|
| Series: | Catalysts |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4344/9/8/645 |
| id |
doaj-dffad6e6517c4a7ca1c239cd120d19c1 |
|---|---|
| record_format |
Article |
| spelling |
doaj-dffad6e6517c4a7ca1c239cd120d19c12020-11-25T00:54:44ZengMDPI AGCatalysts2073-43442019-07-019864510.3390/catal9080645catal9080645Photocatalytic Degradation of Azo Dye Reactive Violet 5 on Fe-Doped Titania Catalysts under Visible Light IrradiationAntonio Zuorro0Roberto Lavecchia1Marika Michela Monaco2Giuseppina Iervolino3Vincenzo Vaiano4Department of Chemical Engineering, Materials and Environment, Sapienza University, 00184 Rome, ItalyDepartment of Chemical Engineering, Materials and Environment, Sapienza University, 00184 Rome, ItalyDepartment of Chemical Engineering, Materials and Environment, Sapienza University, 00184 Rome, ItalyDepartment of Industrial Engineering, University of Salerno, 84084 Fisciano (SA), ItalyDepartment of Industrial Engineering, University of Salerno, 84084 Fisciano (SA), ItalyThe presence of azo dyes in textile effluents is an issue of major concern due to their potential impact on the environment and human health. In this study we investigate the photocatalytic degradation under visible light of Reactive Violet 5 (RV5), an azo dye widely used in the textile industry. A preliminary screening of different titania-based catalysts was carried out to identify the best candidate for RV5 removal. The selected catalyst was then tested in a stirred and aerated lab-scale reactor illuminated with a blue light-emitting diode (LED) source emitting in the wavelength range of 460−470 nm. The effects of pH, catalyst load, and hydrogen peroxide additions on the efficiency of dye removal were evaluated. Under the best conditions (pH 10, 3 g/L of catalyst, and 60 mM hydrogen peroxide), the dye solution was completely decolorized in about 2 h. Overall, the results obtained suggest that the proposed process may represent a suitable method for the removal of RV5 from textile effluents.https://www.mdpi.com/2073-4344/9/8/645photocatalysisvisible lighttitania catalystsazo dyereactive violet 5textile wastewater |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Antonio Zuorro Roberto Lavecchia Marika Michela Monaco Giuseppina Iervolino Vincenzo Vaiano |
| spellingShingle |
Antonio Zuorro Roberto Lavecchia Marika Michela Monaco Giuseppina Iervolino Vincenzo Vaiano Photocatalytic Degradation of Azo Dye Reactive Violet 5 on Fe-Doped Titania Catalysts under Visible Light Irradiation Catalysts photocatalysis visible light titania catalysts azo dye reactive violet 5 textile wastewater |
| author_facet |
Antonio Zuorro Roberto Lavecchia Marika Michela Monaco Giuseppina Iervolino Vincenzo Vaiano |
| author_sort |
Antonio Zuorro |
| title |
Photocatalytic Degradation of Azo Dye Reactive Violet 5 on Fe-Doped Titania Catalysts under Visible Light Irradiation |
| title_short |
Photocatalytic Degradation of Azo Dye Reactive Violet 5 on Fe-Doped Titania Catalysts under Visible Light Irradiation |
| title_full |
Photocatalytic Degradation of Azo Dye Reactive Violet 5 on Fe-Doped Titania Catalysts under Visible Light Irradiation |
| title_fullStr |
Photocatalytic Degradation of Azo Dye Reactive Violet 5 on Fe-Doped Titania Catalysts under Visible Light Irradiation |
| title_full_unstemmed |
Photocatalytic Degradation of Azo Dye Reactive Violet 5 on Fe-Doped Titania Catalysts under Visible Light Irradiation |
| title_sort |
photocatalytic degradation of azo dye reactive violet 5 on fe-doped titania catalysts under visible light irradiation |
| publisher |
MDPI AG |
| series |
Catalysts |
| issn |
2073-4344 |
| publishDate |
2019-07-01 |
| description |
The presence of azo dyes in textile effluents is an issue of major concern due to their potential impact on the environment and human health. In this study we investigate the photocatalytic degradation under visible light of Reactive Violet 5 (RV5), an azo dye widely used in the textile industry. A preliminary screening of different titania-based catalysts was carried out to identify the best candidate for RV5 removal. The selected catalyst was then tested in a stirred and aerated lab-scale reactor illuminated with a blue light-emitting diode (LED) source emitting in the wavelength range of 460−470 nm. The effects of pH, catalyst load, and hydrogen peroxide additions on the efficiency of dye removal were evaluated. Under the best conditions (pH 10, 3 g/L of catalyst, and 60 mM hydrogen peroxide), the dye solution was completely decolorized in about 2 h. Overall, the results obtained suggest that the proposed process may represent a suitable method for the removal of RV5 from textile effluents. |
| topic |
photocatalysis visible light titania catalysts azo dye reactive violet 5 textile wastewater |
| url |
https://www.mdpi.com/2073-4344/9/8/645 |
| work_keys_str_mv |
AT antoniozuorro photocatalyticdegradationofazodyereactiveviolet5onfedopedtitaniacatalystsundervisiblelightirradiation AT robertolavecchia photocatalyticdegradationofazodyereactiveviolet5onfedopedtitaniacatalystsundervisiblelightirradiation AT marikamichelamonaco photocatalyticdegradationofazodyereactiveviolet5onfedopedtitaniacatalystsundervisiblelightirradiation AT giuseppinaiervolino photocatalyticdegradationofazodyereactiveviolet5onfedopedtitaniacatalystsundervisiblelightirradiation AT vincenzovaiano photocatalyticdegradationofazodyereactiveviolet5onfedopedtitaniacatalystsundervisiblelightirradiation |
| _version_ |
1725232956476227584 |