Photocatalytic degradation of 2,4-dichlorophenoxyacetic acid from aqueous solutions by Ag3PO4/TiO2 nanoparticles under visible light: kinetic and thermodynamic studies

Between the countless chemical substances applied in agriculture, 2,4-dichlorophenoxyacetic acid (2,4-D) herbicide is considered as a toxic and carcinogenic pollutant which is difficult to remove from water due to its biological and chemical stability and high solubility. The goal of this study was...

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Autores principales:	Fatemeh Amiri, Mansooreh Dehghani, Zeinab Amiri, Saeed Yousefinejad, Aboolfazl Azhdarpoor
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	2,4-dichlorophenoxyacetic acid ag3po4/tio2 nanoparticle photocatalytic degradation visible light Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/43fd8a561b7f43419912f97493efefdd
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spelling	oai:doaj.org-article:43fd8a561b7f43419912f97493efefdd2021-11-06T11:10:08ZPhotocatalytic degradation of 2,4-dichlorophenoxyacetic acid from aqueous solutions by Ag3PO4/TiO2 nanoparticles under visible light: kinetic and thermodynamic studies0273-12231996-973210.2166/wst.2021.193https://doaj.org/article/43fd8a561b7f43419912f97493efefdd2021-06-01T00:00:00Zhttp://wst.iwaponline.com/content/83/12/3110https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Between the countless chemical substances applied in agriculture, 2,4-dichlorophenoxyacetic acid (2,4-D) herbicide is considered as a toxic and carcinogenic pollutant which is difficult to remove from water due to its biological and chemical stability and high solubility. The goal of this study was photocatalytic degradation of 2,4-D, using Ag3PO4/TiO2 nanoparticles under visible light. The Ag3PO4/TiO2 nanoparticles were characterized using XRD, FESEM and EDS analysis to investigate its crystal structure and elemental compounds. The effect of operating parameters such as pH, contact time, catalyst dose, and initial concentration of herbicide on the efficiency of the process was studied. Increasing the pH and initial concentration of herbicide led to the reduction of the efficiency of removing the herbicide, while increasing contact time and catalyst dose increased the efficiency. The best result (98.4% removal efficiency) was achieved at pH = 3, 1 g/L catalyst dose, 60 min contact time, and 10 mg/L initial concentration of 2,4-D. According to the results, 2,4-D removal efficiency with Ag3PO4/TiO2 photocatalyst reached 96.1% from 98.4% after 5 cycles of reaction. The pseudo-first-order kinetics was the best fit for the 2,4-D degradation by Ag3PO4/TiO2 with correlation coefficients (R2 = 0.9945). The results demonstrated that the photocatalytic process using Ag3PO4/TiO2 nanoparticles in the presence of visible light had a relatively good efficiency in removing 2,4-D. Moreover, Ag3PO4/TiO2 can be used as a reusable photocatalyst for the degradation of such toxins from polluted water and wastewater. HIGHLIGHTS Photocatalytic degradation of 2,4-D by Ag3PO4/TiO2 under visible light.; Higher performance of Ag3PO4/TiO2 compared with TiO2.; High stability of the Ag3PO4/TiO2 photocatalyst after 5 cycles.; Investigation of kinetics of 2,4-D degradation.; Investigation of thermodynamics of 2,4-D degradation.;Fatemeh AmiriMansooreh DehghaniZeinab AmiriSaeed YousefinejadAboolfazl AzhdarpoorIWA Publishingarticle2,4-dichlorophenoxyacetic acidag3po4/tio2 nanoparticlephotocatalytic degradationvisible lightEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 12, Pp 3110-3122 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	2,4-dichlorophenoxyacetic acid ag3po4/tio2 nanoparticle photocatalytic degradation visible light Environmental technology. Sanitary engineering TD1-1066
spellingShingle	2,4-dichlorophenoxyacetic acid ag3po4/tio2 nanoparticle photocatalytic degradation visible light Environmental technology. Sanitary engineering TD1-1066 Fatemeh Amiri Mansooreh Dehghani Zeinab Amiri Saeed Yousefinejad Aboolfazl Azhdarpoor Photocatalytic degradation of 2,4-dichlorophenoxyacetic acid from aqueous solutions by Ag3PO4/TiO2 nanoparticles under visible light: kinetic and thermodynamic studies
description	Between the countless chemical substances applied in agriculture, 2,4-dichlorophenoxyacetic acid (2,4-D) herbicide is considered as a toxic and carcinogenic pollutant which is difficult to remove from water due to its biological and chemical stability and high solubility. The goal of this study was photocatalytic degradation of 2,4-D, using Ag3PO4/TiO2 nanoparticles under visible light. The Ag3PO4/TiO2 nanoparticles were characterized using XRD, FESEM and EDS analysis to investigate its crystal structure and elemental compounds. The effect of operating parameters such as pH, contact time, catalyst dose, and initial concentration of herbicide on the efficiency of the process was studied. Increasing the pH and initial concentration of herbicide led to the reduction of the efficiency of removing the herbicide, while increasing contact time and catalyst dose increased the efficiency. The best result (98.4% removal efficiency) was achieved at pH = 3, 1 g/L catalyst dose, 60 min contact time, and 10 mg/L initial concentration of 2,4-D. According to the results, 2,4-D removal efficiency with Ag3PO4/TiO2 photocatalyst reached 96.1% from 98.4% after 5 cycles of reaction. The pseudo-first-order kinetics was the best fit for the 2,4-D degradation by Ag3PO4/TiO2 with correlation coefficients (R2 = 0.9945). The results demonstrated that the photocatalytic process using Ag3PO4/TiO2 nanoparticles in the presence of visible light had a relatively good efficiency in removing 2,4-D. Moreover, Ag3PO4/TiO2 can be used as a reusable photocatalyst for the degradation of such toxins from polluted water and wastewater. HIGHLIGHTS Photocatalytic degradation of 2,4-D by Ag3PO4/TiO2 under visible light.; Higher performance of Ag3PO4/TiO2 compared with TiO2.; High stability of the Ag3PO4/TiO2 photocatalyst after 5 cycles.; Investigation of kinetics of 2,4-D degradation.; Investigation of thermodynamics of 2,4-D degradation.;
format	article
author	Fatemeh Amiri Mansooreh Dehghani Zeinab Amiri Saeed Yousefinejad Aboolfazl Azhdarpoor
author_facet	Fatemeh Amiri Mansooreh Dehghani Zeinab Amiri Saeed Yousefinejad Aboolfazl Azhdarpoor
author_sort	Fatemeh Amiri
title	Photocatalytic degradation of 2,4-dichlorophenoxyacetic acid from aqueous solutions by Ag3PO4/TiO2 nanoparticles under visible light: kinetic and thermodynamic studies
title_short	Photocatalytic degradation of 2,4-dichlorophenoxyacetic acid from aqueous solutions by Ag3PO4/TiO2 nanoparticles under visible light: kinetic and thermodynamic studies
title_full	Photocatalytic degradation of 2,4-dichlorophenoxyacetic acid from aqueous solutions by Ag3PO4/TiO2 nanoparticles under visible light: kinetic and thermodynamic studies
title_fullStr	Photocatalytic degradation of 2,4-dichlorophenoxyacetic acid from aqueous solutions by Ag3PO4/TiO2 nanoparticles under visible light: kinetic and thermodynamic studies
title_full_unstemmed	Photocatalytic degradation of 2,4-dichlorophenoxyacetic acid from aqueous solutions by Ag3PO4/TiO2 nanoparticles under visible light: kinetic and thermodynamic studies
title_sort	photocatalytic degradation of 2,4-dichlorophenoxyacetic acid from aqueous solutions by ag3po4/tio2 nanoparticles under visible light: kinetic and thermodynamic studies
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/43fd8a561b7f43419912f97493efefdd
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Photocatalytic degradation of 2,4-dichlorophenoxyacetic acid from aqueous solutions by Ag3PO4/TiO2 nanoparticles under visible light: kinetic and thermodynamic studies

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