Cationic Dye Degradation and Real Textile Wastewater Treatment by Heterogeneous Photo-Fenton, Using a Novel Natural Catalyst
A photo-Fenton process using a local iron oxide as a natural catalyst was compared to Fenton and UV/H<sub>2</sub>O<sub>2</sub> advanced oxidation processes for degrading crystal violet (CV) dye in aqueous solutions. The catalyst was characterized by transmission electron micr...
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MDPI AG
2021-11-01
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| Series: | Catalysts |
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| author | Sirine Ben Ayed Mohammad Azam Saud I. Al-Resayes Fadhila Ayari Luigi Rizzo |
| author_facet | Sirine Ben Ayed Mohammad Azam Saud I. Al-Resayes Fadhila Ayari Luigi Rizzo |
| author_sort | Sirine Ben Ayed |
| collection | DOAJ |
| description | A photo-Fenton process using a local iron oxide as a natural catalyst was compared to Fenton and UV/H<sub>2</sub>O<sub>2</sub> advanced oxidation processes for degrading crystal violet (CV) dye in aqueous solutions. The catalyst was characterized by transmission electron microscopy (TEM), energy dispersive X-ray microanalysis (EDX), Fourier transform infrared spectroscopy (FT-IR), Raman spectrum, X-ray diffraction (XRD), UV-vis spectroscopy, and Brunauer–Emmett–Teller (BET) analysis. The optical properties proved that the catalyst represents a good candidate for photocatalytic activity. The impact of different parameters (catalyst dose, initial CV concentration, initial H<sub>2</sub>O<sub>2</sub> concentration, pH) on the photo-Fenton efficiency was evaluated. A photo-Fenton process operated under UVC light irradiation, at spontaneous pH, with 1.0 g/L of catalyst and 30 mg/L of H<sub>2</sub>O<sub>2</sub> was the most effective process, resulting in 98% CV dye removal within 3 h. LC-MS and ion-chromatography techniques were used to identify demethylated organic intermediates during the process. Furthermore, a regeneration study of the catalyst showed its stability and reusability (after three treatment cycles, CV dye degradation decreased from 94% to 83%). Finally, the photo-Fenton process was tested in the treatment of real textile wastewater, and the effluent was found to be in compliance with standards for industrial wastewater disposal into sewerage. |
| first_indexed | 2024-03-10T05:37:06Z |
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| language | English |
| last_indexed | 2024-03-10T05:37:06Z |
| publishDate | 2021-11-01 |
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| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-29b10b3fe49e4f9f8fcb96398c3e26d92023-11-22T22:46:02ZengMDPI AGCatalysts2073-43442021-11-011111135810.3390/catal11111358Cationic Dye Degradation and Real Textile Wastewater Treatment by Heterogeneous Photo-Fenton, Using a Novel Natural CatalystSirine Ben Ayed0Mohammad Azam1Saud I. Al-Resayes2Fadhila Ayari3Luigi Rizzo4Department of Chemistry, Faculty of Sciences of Bizerte, Laboratory of Applications of Chemistry to Resources and Natural Substances and to the Environment (LACReSNE), Carthage University, Zarzouna 7021, TunisiaDepartment of Chemistry, King Saud University, P.O. Box 2454, Riyadh 1145, Saudi ArabiaDepartment of Chemistry, King Saud University, P.O. Box 2454, Riyadh 1145, Saudi ArabiaDepartment of Chemistry, Faculty of Sciences of Bizerte, Laboratory of Applications of Chemistry to Resources and Natural Substances and to the Environment (LACReSNE), Carthage University, Zarzouna 7021, TunisiaWater Science and Technology Group (WaSTe), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, ItalyA photo-Fenton process using a local iron oxide as a natural catalyst was compared to Fenton and UV/H<sub>2</sub>O<sub>2</sub> advanced oxidation processes for degrading crystal violet (CV) dye in aqueous solutions. The catalyst was characterized by transmission electron microscopy (TEM), energy dispersive X-ray microanalysis (EDX), Fourier transform infrared spectroscopy (FT-IR), Raman spectrum, X-ray diffraction (XRD), UV-vis spectroscopy, and Brunauer–Emmett–Teller (BET) analysis. The optical properties proved that the catalyst represents a good candidate for photocatalytic activity. The impact of different parameters (catalyst dose, initial CV concentration, initial H<sub>2</sub>O<sub>2</sub> concentration, pH) on the photo-Fenton efficiency was evaluated. A photo-Fenton process operated under UVC light irradiation, at spontaneous pH, with 1.0 g/L of catalyst and 30 mg/L of H<sub>2</sub>O<sub>2</sub> was the most effective process, resulting in 98% CV dye removal within 3 h. LC-MS and ion-chromatography techniques were used to identify demethylated organic intermediates during the process. Furthermore, a regeneration study of the catalyst showed its stability and reusability (after three treatment cycles, CV dye degradation decreased from 94% to 83%). Finally, the photo-Fenton process was tested in the treatment of real textile wastewater, and the effluent was found to be in compliance with standards for industrial wastewater disposal into sewerage.https://www.mdpi.com/2073-4344/11/11/1358advanced oxidation processescrystal violet dyeheterogeneous catalystiron oxideregenerationreal wastewater |
| spellingShingle | Sirine Ben Ayed Mohammad Azam Saud I. Al-Resayes Fadhila Ayari Luigi Rizzo Cationic Dye Degradation and Real Textile Wastewater Treatment by Heterogeneous Photo-Fenton, Using a Novel Natural Catalyst Catalysts advanced oxidation processes crystal violet dye heterogeneous catalyst iron oxide regeneration real wastewater |
| title | Cationic Dye Degradation and Real Textile Wastewater Treatment by Heterogeneous Photo-Fenton, Using a Novel Natural Catalyst |
| title_full | Cationic Dye Degradation and Real Textile Wastewater Treatment by Heterogeneous Photo-Fenton, Using a Novel Natural Catalyst |
| title_fullStr | Cationic Dye Degradation and Real Textile Wastewater Treatment by Heterogeneous Photo-Fenton, Using a Novel Natural Catalyst |
| title_full_unstemmed | Cationic Dye Degradation and Real Textile Wastewater Treatment by Heterogeneous Photo-Fenton, Using a Novel Natural Catalyst |
| title_short | Cationic Dye Degradation and Real Textile Wastewater Treatment by Heterogeneous Photo-Fenton, Using a Novel Natural Catalyst |
| title_sort | cationic dye degradation and real textile wastewater treatment by heterogeneous photo fenton using a novel natural catalyst |
| topic | advanced oxidation processes crystal violet dye heterogeneous catalyst iron oxide regeneration real wastewater |
| url | https://www.mdpi.com/2073-4344/11/11/1358 |
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