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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Autores principales:	Sirine Ben Ayed, Mohammad Azam, Saud I. Al-Resayes, Fadhila Ayari, Luigi Rizzo
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	advanced oxidation processes crystal violet dye heterogeneous catalyst iron oxide regeneration real wastewater Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/29b10b3fe49e4f9f8fcb96398c3e26d9
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spelling	oai:doaj.org-article:29b10b3fe49e4f9f8fcb96398c3e26d92021-11-25T17:06:17ZCationic Dye Degradation and Real Textile Wastewater Treatment by Heterogeneous Photo-Fenton, Using a Novel Natural Catalyst10.3390/catal111113582073-4344https://doaj.org/article/29b10b3fe49e4f9f8fcb96398c3e26d92021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1358https://doaj.org/toc/2073-4344A 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.Sirine Ben AyedMohammad AzamSaud I. Al-ResayesFadhila AyariLuigi RizzoMDPI AGarticleadvanced oxidation processescrystal violet dyeheterogeneous catalystiron oxideregenerationreal wastewaterChemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1358, p 1358 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	advanced oxidation processes crystal violet dye heterogeneous catalyst iron oxide regeneration real wastewater Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	advanced oxidation processes crystal violet dye heterogeneous catalyst iron oxide regeneration real wastewater Chemical technology TP1-1185 Chemistry QD1-999 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
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.
format	article
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
title	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_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_sort	cationic dye degradation and real textile wastewater treatment by heterogeneous photo-fenton, using a novel natural catalyst
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/29b10b3fe49e4f9f8fcb96398c3e26d9
work_keys_str_mv	AT sirinebenayed cationicdyedegradationandrealtextilewastewatertreatmentbyheterogeneousphotofentonusinganovelnaturalcatalyst AT mohammadazam cationicdyedegradationandrealtextilewastewatertreatmentbyheterogeneousphotofentonusinganovelnaturalcatalyst AT saudialresayes cationicdyedegradationandrealtextilewastewatertreatmentbyheterogeneousphotofentonusinganovelnaturalcatalyst AT fadhilaayari cationicdyedegradationandrealtextilewastewatertreatmentbyheterogeneousphotofentonusinganovelnaturalcatalyst AT luigirizzo cationicdyedegradationandrealtextilewastewatertreatmentbyheterogeneousphotofentonusinganovelnaturalcatalyst
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Cationic Dye Degradation and Real Textile Wastewater Treatment by Heterogeneous Photo-Fenton, Using a Novel Natural Catalyst

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