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Cationic Dye Degradation and Real Textile Wastewater Treatment by Heterogeneous Photo-Fenton, Using a Novel Natural Catalyst
| Content Provider | MDPI |
|---|---|
| Author | Ayed, Sirine Ben Azam, Mohammad Al-Resayes, Saud I. Ayari, Fadhila Rizzo, Luigi |
| Copyright Year | 2021 |
| Description | A photo-Fenton process using a local iron oxide as a natural catalyst was compared to Fenton and $UV/H_{2}O_{2}$ 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 $H_{2}O_{2}$ 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 $H_{2}O_{2}$ 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. |
| Starting Page | 1358 |
| e-ISSN | 20734344 |
| DOI | 10.3390/catal11111358 |
| Journal | Catalysts |
| Issue Number | 11 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-11-12 |
| Access Restriction | Open |
| Subject Keyword | Catalysts Environmental Engineering Advanced Oxidation Processes Crystal Violet Dye Heterogeneous Catalyst Iron Oxide Regeneration Real Wastewater |
| Content Type | Text |
| Resource Type | Article |
