Photocatalytic degradation of fungicide difenoconazole via photo-Fento process usingα-Fe2O3

Hajar Lamkhanter; Sana Frindy; Yuri Park; Mika Sillanpӓӓ; Hafida Mountacer

doi:10.1016/j.matchemphys.2021.124713

Photocatalytic degradation of fungicide difenoconazole via photo-Fento process usingα-Fe₂O₃

Hajar Lamkhanter
, Sana Frindy
, Yuri Park
, Mika Sillanpӓӓ
, Hafida Mountacer^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

16 Citations (Scopus)

Abstract

Nowadays, Human consumption leads to massive industrial sector manufacturing. Pesticides are one of the most toxic chemicals widely used to increase agricultural production. Those compounds present several threats to the environment. The photodegradation of difenoconazole (DFL) fungicide was carried out via Photo-Fenton process using synthesized α-Fe₂O₃ nanoparticles. The α-Fe₂O₃ was prepared using hydrothermal approach at 180 °C with ferric chloride and sodium hydroxide reagents. The sample was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and Raman analysis. Average crystallite size has been recorded to be 27 nm and the surface area was found to be S_Bet = 24.82 m²/g. DFL removal has been tested under divers systems: UV photolysis, UV/H₂O₂, UV/α-Fe₂O_3, Fenton and Photo-Fenton process. The kinetic has been monitored using High-Performance Liquid Chromatography (HPLC). All irradiation tests were achieved at 254 nm using UVC Lamp. An optimization of reaction conditions (pH, oxidant concentration, and catalyst dosage) were performed As a result, it was demonstrated that Photo-Fenton process (UV/α-Fe₂O₃/H₂O₂) as most effective for DFL removal. The optimal catalyst dose of α-Fe₂O₃ for high removal rate is about 0.5 g/l at initial solution pH. The mineralization efficiency attained 83.67%. The oxidation kinetics of DFL was recorded to accord with the pseudo-first order kinetic model. Finally, a possible mechanism pathway was proposed based on detected intermediates using gas chromatography-mass spectrometry (GC-MS) analysis.

Original language	English
Article number	124713
Number of pages	9
Journal	Materials Chemistry and Physics
Volume	267
Early online date	7 May 2021
DOIs	https://doi.org/10.1016/j.matchemphys.2021.124713
Publication status	Published - 15 Jul 2021
MoE publication type	A1 Journal article-refereed

Funding

This work is the fruit of research internship at Department of Separation Sciences, University of Technology LUT, Mikkeli, Finland. The first author would like to thank Pr Sillanpaa for this collaboration. Dr Frindy would like to thank Maa- JA vesitekniikan tuki ry (MVTT) for her financial support.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 2 Zero Hunger
SDG 12 Responsible Consumption and Production

Keywords

Definoconazole
Hematite
Photo-Fenton
Photocatalysis
Wastewater treatment

Access to Document

10.1016/j.matchemphys.2021.124713

Cite this

@article{66156128e6b24ac88664c7d8a49421f1,

title = "Photocatalytic degradation of fungicide difenoconazole via photo-Fento process usingα-Fe2O3",

abstract = "Nowadays, Human consumption leads to massive industrial sector manufacturing. Pesticides are one of the most toxic chemicals widely used to increase agricultural production. Those compounds present several threats to the environment. The photodegradation of difenoconazole (DFL) fungicide was carried out via Photo-Fenton process using synthesized α-Fe2O3 nanoparticles. The α-Fe2O3 was prepared using hydrothermal approach at 180 °C with ferric chloride and sodium hydroxide reagents. The sample was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and Raman analysis. Average crystallite size has been recorded to be 27 nm and the surface area was found to be SBet = 24.82 m2/g. DFL removal has been tested under divers systems: UV photolysis, UV/H2O2, UV/α-Fe2O3, Fenton and Photo-Fenton process. The kinetic has been monitored using High-Performance Liquid Chromatography (HPLC). All irradiation tests were achieved at 254 nm using UVC Lamp. An optimization of reaction conditions (pH, oxidant concentration, and catalyst dosage) were performed As a result, it was demonstrated that Photo-Fenton process (UV/α-Fe2O3/H2O2) as most effective for DFL removal. The optimal catalyst dose of α-Fe2O3 for high removal rate is about 0.5 g/l at initial solution pH. The mineralization efficiency attained 83.67\%. The oxidation kinetics of DFL was recorded to accord with the pseudo-first order kinetic model. Finally, a possible mechanism pathway was proposed based on detected intermediates using gas chromatography-mass spectrometry (GC-MS) analysis.",

keywords = "Definoconazole, Hematite, Photo-Fenton, Photocatalysis, Wastewater treatment",

author = "Hajar Lamkhanter and Sana Frindy and Yuri Park and Mika Sillanpӓӓ and Hafida Mountacer",

note = "Funding Information: This work is the fruit of research internship at Department of Separation Sciences, University of Technology LUT, Mikkeli, Finland. The first author would like to thank Pr Sillanpaa for this collaboration. Dr Frindy would like to thank Maa- JA vesitekniikan tuki ry (MVTT) for her financial support. Publisher Copyright: {\textcopyright} 2021 Elsevier B.V. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

year = "2021",

month = jul,

day = "15",

doi = "10.1016/j.matchemphys.2021.124713",

language = "English",

volume = "267",

journal = "Materials Chemistry and Physics",

issn = "0254-0584",

publisher = "Elsevier",

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TY - JOUR

T1 - Photocatalytic degradation of fungicide difenoconazole via photo-Fento process usingα-Fe2O3

AU - Lamkhanter, Hajar

AU - Frindy, Sana

AU - Park, Yuri

AU - Sillanpӓӓ, Mika

AU - Mountacer, Hafida

N1 - Funding Information: This work is the fruit of research internship at Department of Separation Sciences, University of Technology LUT, Mikkeli, Finland. The first author would like to thank Pr Sillanpaa for this collaboration. Dr Frindy would like to thank Maa- JA vesitekniikan tuki ry (MVTT) for her financial support. Publisher Copyright: © 2021 Elsevier B.V. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/7/15

Y1 - 2021/7/15

N2 - Nowadays, Human consumption leads to massive industrial sector manufacturing. Pesticides are one of the most toxic chemicals widely used to increase agricultural production. Those compounds present several threats to the environment. The photodegradation of difenoconazole (DFL) fungicide was carried out via Photo-Fenton process using synthesized α-Fe2O3 nanoparticles. The α-Fe2O3 was prepared using hydrothermal approach at 180 °C with ferric chloride and sodium hydroxide reagents. The sample was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and Raman analysis. Average crystallite size has been recorded to be 27 nm and the surface area was found to be SBet = 24.82 m2/g. DFL removal has been tested under divers systems: UV photolysis, UV/H2O2, UV/α-Fe2O3, Fenton and Photo-Fenton process. The kinetic has been monitored using High-Performance Liquid Chromatography (HPLC). All irradiation tests were achieved at 254 nm using UVC Lamp. An optimization of reaction conditions (pH, oxidant concentration, and catalyst dosage) were performed As a result, it was demonstrated that Photo-Fenton process (UV/α-Fe2O3/H2O2) as most effective for DFL removal. The optimal catalyst dose of α-Fe2O3 for high removal rate is about 0.5 g/l at initial solution pH. The mineralization efficiency attained 83.67%. The oxidation kinetics of DFL was recorded to accord with the pseudo-first order kinetic model. Finally, a possible mechanism pathway was proposed based on detected intermediates using gas chromatography-mass spectrometry (GC-MS) analysis.

AB - Nowadays, Human consumption leads to massive industrial sector manufacturing. Pesticides are one of the most toxic chemicals widely used to increase agricultural production. Those compounds present several threats to the environment. The photodegradation of difenoconazole (DFL) fungicide was carried out via Photo-Fenton process using synthesized α-Fe2O3 nanoparticles. The α-Fe2O3 was prepared using hydrothermal approach at 180 °C with ferric chloride and sodium hydroxide reagents. The sample was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and Raman analysis. Average crystallite size has been recorded to be 27 nm and the surface area was found to be SBet = 24.82 m2/g. DFL removal has been tested under divers systems: UV photolysis, UV/H2O2, UV/α-Fe2O3, Fenton and Photo-Fenton process. The kinetic has been monitored using High-Performance Liquid Chromatography (HPLC). All irradiation tests were achieved at 254 nm using UVC Lamp. An optimization of reaction conditions (pH, oxidant concentration, and catalyst dosage) were performed As a result, it was demonstrated that Photo-Fenton process (UV/α-Fe2O3/H2O2) as most effective for DFL removal. The optimal catalyst dose of α-Fe2O3 for high removal rate is about 0.5 g/l at initial solution pH. The mineralization efficiency attained 83.67%. The oxidation kinetics of DFL was recorded to accord with the pseudo-first order kinetic model. Finally, a possible mechanism pathway was proposed based on detected intermediates using gas chromatography-mass spectrometry (GC-MS) analysis.

KW - Definoconazole

KW - Hematite

KW - Photo-Fenton

KW - Photocatalysis

KW - Wastewater treatment

UR - https://www.scopus.com/pages/publications/85105742823

U2 - 10.1016/j.matchemphys.2021.124713

DO - 10.1016/j.matchemphys.2021.124713

M3 - Article

AN - SCOPUS:85105742823

SN - 0254-0584

VL - 267

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

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