Mineralization of hetero bi-functional reactive dye in aqueous solution by Fenton and photo-Fenton reactions

Torrades, Francesc; García‐Hortal, José Antonio; Garcı́a-Montaño, Julia

doi:10.1080/09593330.2015.1019931

Cited by 13 publications

(5 citation statements)

References 36 publications

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“…Fig.SI5 (b) showed that the fenuron degradation depended on pH, the optimal initial pH value for fenuron photodegradation by NIO and oxalic acid was about 3.0 because when the pH decreased, the formation of Fe +2 species decreased significantly. [26] This result showed that an initial pH lower than 3 was not favored to photo-Fenton-like system. [27] …”

Section: Ph Valuementioning

confidence: 90%

Oxidative photodegradation of herbicide fenuron in aqueous solution by natural iron oxide α-Fe₂O₃, influence of polycarboxylic acids

Kribéche¹,

Mechakra²,

Sehili³

et al. 2015

Environmental Technology

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The photodegradation of the herbicide fenuron (1,1-dimethyl-3-phenylurea) by using a natural iron oxide (NIO), α-Fe2O3, in aqueous solution at acidic pH has been undertaken. The NIO was characterized by the Raman spectroscopy method. The degradation pathways and the formation of degradation products were studied. A high-pressure mercury lamp and sunlight were employed as light source. Fenuron photodegradation using NIO with oxalic acid followed the pseudo-first-order kinetics, the optimal experimental conditions were [oxalic acid]0 = 10(-3) M and [NIO] = 0.1 g L(-1) at pH 3. A UVA/NIO/oxalic acid system led to a low fenuron half-life (60 min). The results were even better when solar light is used (30 min). The variables studied were the doses of iron oxide, of carboxylic acids, the solution pH and the effect of sunlight irradiation. The effects of four carboxylic acids, oxalic, citric, tartaric and malic acids, on the fenuron photodegradation with NIO have been investigated, oxalic acid was the most effective carboxylic acid used at pH 3. A similar trend was observed for the removal of total organic carbon (TOC), 75% of TOC was removed. The analytical study showed many aromatic intermediates, short-chain carboxylic acids and inorganic ion.

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Section: Ph Valuementioning

confidence: 90%

Oxidative photodegradation of herbicide fenuron in aqueous solution by natural iron oxide α-Fe₂O₃, influence of polycarboxylic acids

Kribéche¹,

Mechakra²,

Sehili³

et al. 2015

Environmental Technology

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“…Rahmani et al 2015 At a pH below 3, the hydrogen peroxide decomposes into hydroxyl radicals, which are highly reactive and capable of oxidizing a wide range of organic pollutants. At acidic pH, hydroxyl radicals are the dominant species in the environment (Bokhari et al, 2013) as well as the breakdown of H2O2 into water and oxygen, which occurs above pH 5 (Davarnejad and Hosseinitabar, 2016, Moreira et al, 2017, Torrades et al, 2015. However, as the pH increases, hydrogen peroxide decomposition slows down, reducing the availability of hydroxyl radicals and lowering the EF process' removal capability.…”

Section: Influence Of Voltage and Phmentioning

confidence: 99%

Efficient Removal of Reactive Textile Dye using Electro-Fenton Process: Response Surface Methodology Approach

Karabacakoğlu

Karaduman

2023

Preprint

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Electro-Fenton (EF) is a system where electrooxidation and electrocoagulation come together. In the EF method, it is aimed at creating OH radicals in an electrochemical cell by catalyzing H2O2 with Fe2+ ions. In this study, optimization of process variables for the removal of reactive azo dye (reactive yellow 145) from aqueous solution by the electro-Fenton method was carried out using response surface methodology. The percentage of dye removal and energy consumption were selected as the response functions for the 5 variables determined as voltage, H2O2 concentration, pH, electrode spacing, and processing time. As a result of 32 experiments determined by the Design Expert 13 program, the effect of variables on response functions was examined separately and together. 10 V voltage to 99.4%, which is the highest removal; pH 2.5; 1 cm electrode range; 1 mL H2O2 addition; and 22.16 Wh/L energy consumption in a 70-min treatment time were reached. The optimum values of the variables proposed by the program to ensure the highest dye removal efficiency (approximately 93%) and the lowest energy consumption (approx. 3.4 Wh/L) are approximately 9.4 V voltage, pH 3.7, 2.5 cm electrode range, 1 mL H2O2 addition, and a 40-minute treatment time.

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“…At a pH below 3, the hydrogen peroxide decomposes into hydroxyl radicals, which are highly reactive and capable of oxidizing a wide range of organic pollutants. At acidic pH, hydroxyl radicals are the dominant species in the environment (Bokhari et al, 2013) as well as the breakdown of H2O2 into water and oxygen, which occurs above pH 5 (Davarnejad & Hosseinitabar, 2016;Moreira et al, 2017;Torrades et al, 2015). However, as the pH increases, hydrogen peroxide decomposition slows down, reducing the availability of hydroxyl radicals and lowering the EF process removal capability.…”

Section: Influence Of Voltage and Phmentioning

confidence: 99%

Optimization of electro-Fenton process variables in terms of dye removal and energy consumption with response surface methodology

Karabacakoğlu,

Karaduman

2023

Preprint

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Waste water containing reactive textile dyes constitutes an important environmental problem as they are permanent and dangerous. The Electro-Fenton (EF) method is promising as an effective technique for the degradation of organic materials such as dyestuffs. In this study, the optimization of effective variables in the removal of reactive yellow 145 azo textile dye by the EF using response surface methodology (RSM) was investigated. Central composite design (CCD) was used to study the combined effects of key parameters such as voltage (2.5–12.5 V), H2O2 addition (0.1–1.3 mL), pH (1.75–4.75), electrode spacing (0.25–3.25 cm), and treatment time (25–85 min). The optimum values of the variables to ensure the highest dye removal efficiency (approx. 93%) with the lowest energy consumption (approx. 3.4 Wh/L) are approximately 9.4 V voltage, pH 3.7, 2.5 cm electrode range, 1 mL H2O2 addition, and a 40-minute treatment time. ANOVA analysis of the predicted quadratic polynomial model showed a regression coefficient value of approximately 0.97 for both objective functions; this highlights the applicability of the model for navigating the design space. Simultaneous optimization of process parameters using RSM was achieved with a low number of experiments.

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Mineralization of hetero bi-functional reactive dye in aqueous solution by Fenton and photo-Fenton reactions

Abstract: This study focused on the advanced oxidation of the hetero bi-functional reactive dye

Cited by 13 publications

References 36 publications

Oxidative photodegradation of herbicide fenuron in aqueous solution by natural iron oxide α-Fe₂O₃, influence of polycarboxylic acids

Oxidative photodegradation of herbicide fenuron in aqueous solution by natural iron oxide α-Fe₂O₃, influence of polycarboxylic acids

Efficient Removal of Reactive Textile Dye using Electro-Fenton Process: Response Surface Methodology Approach

Optimization of electro-Fenton process variables in terms of dye removal and energy consumption with response surface methodology

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Mineralization of hetero bi-functional reactive dye in aqueous solution by Fenton and photo-Fenton reactions

Abstract: This study focused on the advanced oxidation of the hetero bi-functional reactive dye

Cited by 13 publications

References 36 publications

Oxidative photodegradation of herbicide fenuron in aqueous solution by natural iron oxide α-Fe2O3, influence of polycarboxylic acids

Oxidative photodegradation of herbicide fenuron in aqueous solution by natural iron oxide α-Fe2O3, influence of polycarboxylic acids

Efficient Removal of Reactive Textile Dye using Electro-Fenton Process: Response Surface Methodology Approach

Optimization of electro-Fenton process variables in terms of dye removal and energy consumption with response surface methodology

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Oxidative photodegradation of herbicide fenuron in aqueous solution by natural iron oxide α-Fe₂O₃, influence of polycarboxylic acids

Oxidative photodegradation of herbicide fenuron in aqueous solution by natural iron oxide α-Fe₂O₃, influence of polycarboxylic acids