Multi-Response/Multi-Step Optimization of Heterogeneous Fenton Process with Fe3O4 Catalyst for the Treatment of Landfill Leachate

Since conventional biological treatment methods are not sufficient alone to treat landfill leachate, this study investigated the efficacy of the heterogeneous Fenton process as a preliminary treatment technique. With this aim, a two-level factorial design combined with the response surface methodolo...

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Veröffentlicht in:Water, air, and soil pollution air, and soil pollution, 2021-07, Vol.232 (7), Article 275
Hauptverfasser: Taşcı, Salih, Özgüven, Ayşe, Yıldız, Burçin
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creator Taşcı, Salih
Özgüven, Ayşe
Yıldız, Burçin
description Since conventional biological treatment methods are not sufficient alone to treat landfill leachate, this study investigated the efficacy of the heterogeneous Fenton process as a preliminary treatment technique. With this aim, a two-level factorial design combined with the response surface methodology (RSM) was used to optimize the operating parameters for the heterogeneous Fenton process used for treatment of leachate. The surface morphology and elemental analysis of Fe 3 O 4 nanoparticles used in the heterogeneous Fenton process were completed with scanning electron microscope (SEM), energy dispersive X-ray (EDX) and Fourier transform infrared spectroscopy (FT-IR). In order to obtain maximum 75% chemical oxygen demand (COD) removal for treatment of leachate with the heterogeneous Fenton process, the optimum conditions for H 2 O 2 and Fe 3 O 4 dosages, stirring rate and initial pH parameters were 800 mg/L, 334.54 mg/L, 255 rpm and 3.34, respectively. The results obtained show the heterogeneous Fenton process abides by the second-order model ( R 2  = 0.9896), and the variables mentioned above were confirmed to significantly affect the COD removal efficiency. Response surface graphs show the use of higher pH and chemical agents do not increase the COD removal efficiency. This study proves the applicability of the multi-response optimization program for treatment of leachate from a landfill site representing a serious problem in environmental terms.
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Response surface graphs show the use of higher pH and chemical agents do not increase the COD removal efficiency. 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With this aim, a two-level factorial design combined with the response surface methodology (RSM) was used to optimize the operating parameters for the heterogeneous Fenton process used for treatment of leachate. The surface morphology and elemental analysis of Fe 3 O 4 nanoparticles used in the heterogeneous Fenton process were completed with scanning electron microscope (SEM), energy dispersive X-ray (EDX) and Fourier transform infrared spectroscopy (FT-IR). In order to obtain maximum 75% chemical oxygen demand (COD) removal for treatment of leachate with the heterogeneous Fenton process, the optimum conditions for H 2 O 2 and Fe 3 O 4 dosages, stirring rate and initial pH parameters were 800 mg/L, 334.54 mg/L, 255 rpm and 3.34, respectively. The results obtained show the heterogeneous Fenton process abides by the second-order model ( R 2  = 0.9896), and the variables mentioned above were confirmed to significantly affect the COD removal efficiency. Response surface graphs show the use of higher pH and chemical agents do not increase the COD removal efficiency. This study proves the applicability of the multi-response optimization program for treatment of leachate from a landfill site representing a serious problem in environmental terms.</abstract><cop>Cham</cop><pub>Springer International Publishing</pub><doi>10.1007/s11270-021-05225-w</doi><orcidid>https://orcid.org/0000-0003-1071-2813</orcidid></addata></record>
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subjects Analytical methods
Atmospheric Protection/Air Quality Control/Air Pollution
Biological treatment
Catalysts
Chemical agents
Chemical analysis
Chemical oxygen demand
Climate Change/Climate Change Impacts
Earth and Environmental Science
Electron microscopes
Environment
Environmental monitoring
Factorial design
Fourier analysis
Fourier transforms
Graphs
Hydrogen peroxide
Hydrogeology
Infrared spectroscopy
Iron oxides
Landfill
Landfills
Leachates
Morphology
Nanoparticles
Optimization
Parameters
pH effects
Removal
Response surface methodology
Scanning electron microscopy
Soil Science & Conservation
Waste disposal sites
Waste treatment
Wastewater treatment
Water pollution treatment
Water Quality/Water Pollution
title Multi-Response/Multi-Step Optimization of Heterogeneous Fenton Process with Fe3O4 Catalyst for the Treatment of Landfill Leachate
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