Degradation of aniline from aqueous solution by Fenton process: modeling and optimization

Mousavi, Seyyed Alireza; Farrokhi, Fatemeh; Kianirad, Nazanin; Falahi, Farzaneh

doi:10.5004/dwt.2018.22941

Cited by 5 publications

(5 citation statements)

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“…The coefficient of determination (R 2 ) was 0.97 for OTC removal and 0.91 for COD removal, close to 1, confirming that the predicted data were matched with experimental values [37,38]. The lack of fit for both models was non-significant, indicating the suitability of the models.…”

Section: Statistical Analysis and Modeling For Photodegradation Of Ot...supporting

confidence: 61%

Comparative Study on Enhanced Photocatalytic Activity of Visible Light-Active Nanostructures for Degradation of Oxytetracycline and COD Removal of Licorice Extraction Plant Wastewater

Zangeneh

Mousavi

Eskandari

et al. 2023

Water

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This study evaluates the effects of carbon, nitrogen, and sulfur dopants on the photocatalytic activity of TiO2 for degradation of oxytetracycline (OTC) and chemical oxygen demand (COD) removal from licorice extraction plant wastewater (LEPW). Three novel visible-light-responsive nanostructures, including L-Histidine-TiO2, L-Methionine-TiO2 and L-Asparagine-TiO2, were successfully synthesized. The results showed that the modification of TiO2 with these three amino acids made the catalyst active in the visible light region and reduced the recombination rate of e−/h+ pairs according to PL analysis. The photodegradation efficiency of L-Histidine (2 wt.%)-TiO2 was 100% and 94% for OTC and COD, respectively. It showed the highest photocatalytic activity under illumination, compared to L-Methionine (1.5 wt.%)-TiO2 and L-Asparagine (2 wt.%)-TiO2. Synthesized composites were characterized with SEM, XRD, FTIR, DRS, and PL analyses. The biological oxygen demand to COD (BOD5/COD) ratio for treated LEPW was determined to be 0.5–0.6, confirming the enhanced biodegradability of the treated effluent. The effect of the independent variables, namely, initial concentration of OTC and COD, catalyst dosage, irradiation time, pH of solution, and light intensity, on the photocatalytic process was evaluated by Response Surface Methodology (RSM), and the optimum value of each independent parameter for maximum degradation of OTC and COD by L-Histidine (2 wt.%)-TiO2 was determined. The radical trapping experiment was performed with various scavengers in order to propose a photocatalytic mechanism, showing that hydroxyl radicals were the main active species. L-Histidine (2 wt.%)-TiO2 showed a stable and reusable structure even after four cycles of COD removal under the following optimal conditions of [COD]: 300 mg/L, [catalyst]: 1 g/L, light intensity: 25 W/cm2 at pH = 4 after 180 min irradiation.

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Section: Statistical Analysis and Modeling For Photodegradation Of Ot...supporting

confidence: 61%

Comparative Study on Enhanced Photocatalytic Activity of Visible Light-Active Nanostructures for Degradation of Oxytetracycline and COD Removal of Licorice Extraction Plant Wastewater

Zangeneh

Mousavi

Eskandari

et al. 2023

Water

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“…The tetracycline removal efficiency was increased until the reaction time of 10 min. In the Fenton process, it can be said that the effect of the reaction time on the process efficiency is important since the degradation efficiency increases with increasing reaction time [8]. However, the further increase in reaction time (>10 min) did not show a positive effect on the efficiency of the Fenton process.…”

Section: Effect Of Reaction Timementioning

confidence: 99%

“…Advanced oxidation processes are efficient alternative methods for treating organic wastewater pollutants with low biodegradable and high toxicity. Advanced oxidation methods such as Fenton, photo-Fenton, ozonation, electrochemical oxidation and photo catalysis are commonly used in the removal of recalcitrant and non-biodegradable organic contaminants in wastewa-ter [8]. Fenton process, which is one of the advanced oxidation processes, is one of the most widely used processes for removing of a wide variety of non-degradable organic contaminants because it has advantages such as high performance, technology simplicity, low cost and low toxicity of the chemicals used [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…Advanced oxidation methods such as Fenton, photo-Fenton, ozonation, electrochemical oxidation and photo catalysis are commonly used in the removal of recalcitrant and non-biodegradable organic contaminants in wastewa-ter [8]. Fenton process, which is one of the advanced oxidation processes, is one of the most widely used processes for removing of a wide variety of non-degradable organic contaminants because it has advantages such as high performance, technology simplicity, low cost and low toxicity of the chemicals used [8,9]. The Fenton process involves the formation of hydroxyl radical formed by the catalytic reaction between hydrogen peroxide and iron ions (Eq.…”

Section: Introductionmentioning

confidence: 99%

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Degradation and mineralization of tetracycline by Fenton process

Gürtekin

ÇELİK

Aydın

et al. 2022

Environmental Research and Technology

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In this study, we aimed to investigate the degradation and mineralization of tetracycline by Fenton process. For this purpose; optimum values were found for Fe2+ concentration, H2O2 concentration and pH, reaction time, sedimentation times which are effective operating parameters in Fenton process. In this study where initial tetracycline concentration was used as 100 mg/L; optimum values were found as 4 for pH, 30 mg/L for Fe2+ concentration, 100 mg/L for H2O2 concentration and 10 min for reaction time and 90 min for sedimentation time. Under these conditions, the TC degradation was 100%, while the COD removal efficiency was approximately 94%. As a result of kinetic studies, BMG is the most suitable kinetic model in terms of tetracycline degradation, while it is seen that the most suitable kinetic model for tetracycline mineralization in terms of COD is the first order kinetic model. The cost of removing 1 kg of tetracycline from the unit costs of chemicals and energy used in the Fenton process was found to be $ 1.527.

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“…Advanced oxidation methods are based on the formation of hydroxyl radicals and can oxidize a wide range of organic matter to CO2 and H2O (Sun et al, 2009). Methods such as Fenton, photo-Fenton, ozonation, electrochemical oxidation and photocatalysis are the most commonly used advanced oxidation processes (Mousavi et al, 2018). In the Fenton process, these recalcitrant and non-biodegradable complex organic compounds are oxidized with the •OH formed by Fe 2+ and H2O2 reaction (Eqs.1-2) (Hakika et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Degradation of Oxytetracycline and Chlortetracycline by Fenton Process

ÇELİK

Aydın

Çelik

et al. 2023

Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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In this study, degradation of oxytetracycline (OTC) and chlortetracycline (CTC) was investigated by Fenton process. In experimental studies conducted for this purpose, different values of pH, Fe2+ concentration, H2O2 concentration and reaction time were tested as important parameters for the Fenton process and optimum conditions for OTC and CTC removal were determined. For both antibiotics, the optimum values of the parameters in the Fenton process were the same, and these values were found to be 3 for pH, 20 mg/L for Fe2+ concentration, 25 mg/L for H2O2 concentration, 5 min for reaction time. Under these optimum conditions, OTC degradation was 100%, CTC degradation was 99.68%, chemical oxygen demand (COD) removal efficiency for oxytetracycline (O-COD) was 89.6%, COD removal efficiency for chlortetracycline (C-COD) was 88.5%. These results show that the Fenton process is an effective method that can be used for OTC and CTC degradation.

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Degradation of aniline from aqueous solution by Fenton process: modeling and optimization

Cited by 5 publications

References 0 publications

Comparative Study on Enhanced Photocatalytic Activity of Visible Light-Active Nanostructures for Degradation of Oxytetracycline and COD Removal of Licorice Extraction Plant Wastewater

Comparative Study on Enhanced Photocatalytic Activity of Visible Light-Active Nanostructures for Degradation of Oxytetracycline and COD Removal of Licorice Extraction Plant Wastewater

Degradation and mineralization of tetracycline by Fenton process

Degradation of Oxytetracycline and Chlortetracycline by Fenton Process

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