Application of Fenton process for decolorization of reactive black 5 from synthetic wastewater: Kinetics and thermodynamics

Argun, Mehmet Emin; Karataş, Mustafa

doi:10.1002/ep.10504

Cited by 53 publications

(27 citation statements)

References 33 publications

(43 reference statements)

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“…It was observed that the optimum Fe 31 content is about 0.05 mM and the maximum production of hydroxyl radicals takes place at this content. At high Fe 31 concentrations, decolorization efficiency decreases because of the scavenging effect of excess Fe 21 . In the excess amounts of Fe 21 ion, it can react with hydroxyl radical (Eq.…”

Section: Effect Of Initial Fe 3 Concentrationmentioning

confidence: 99%

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Treatment of a dye solution using photoelectro‐fenton process on the cathode containing carbon nanotubes under recirculation mode: Investigation of operational parameters and artificial neural network modeling

Khataee

Vahid

Behjati

et al. 2012

Env Prog and Sustain Energy

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The electrochemical treatment of dye solution containing C.I. Direct Red 23 (DR23) has been studied under recirculation mode with an UV irradiation of 15 W. Decolorization experiments were performed in the presence of sulfate electrolyte media at pH 3.0 with carbon nanotube‐polytetrafluoroethylene (CNT‐PTFE) electrode as cathode. A comparison of electro‐Fenton (EF) and photoelectro‐Fenton (PEF) processes was carried out for decolorization of DR23 solution. Color removal efficiency was 66.22% and 94.29% for EF and PEF processes after 60 min treatment of 30 mg/L DR23, respectively. The effect of operational parameters on the PEF process such as applied current, initial pH, flow rate, initial Fe3+ concentration and initial dye concentration was investigated. Results indicated that the optimal conditions for decolorization process were applied current of 0.2 A, flow rate of 10 L/h, pH = 3, initial Fe3+ concentration of 0.05 mM and initial dye concentration of 10 mg/L. An artificial neural network (ANN) model was developed to predict the decolorization of DR23 solution, which provided reasonable predictive performance (R2 = 0.958). © 2012 American Institute of Chemical Engineers Environ Prog, 32: 557–563, 2013

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Section: Effect Of Initial Fe 3 Concentrationmentioning

confidence: 99%

“…Fe 31 can also react with H 2 O 2 (Eqs. 9 and 10) to produce HO 2 Á and Fe 21 resulting in decrease in color removal efficiency.…”

Section: Effect Of Initial Fe 3 Concentrationmentioning

confidence: 99%

Treatment of a dye solution using photoelectro‐fenton process on the cathode containing carbon nanotubes under recirculation mode: Investigation of operational parameters and artificial neural network modeling

Khataee

Vahid

Behjati

et al. 2012

Env Prog and Sustain Energy

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“…In the direct anodic oxidation process, it undergoes direct charge transfer reactions between the anode surface and the dye pollutants on metal oxide electrodes (Foti, Gandini, Comninellis, Perret, & Haenni, ; Ghanim & Hamza, ). In the indirect anodic oxidation process, strong oxidants are generated during electrolysis, such as hypochlorite/chlorine (Rajkumar, Song, & Kim, ; Szpyrkowicz et al, ), hydrogen peroxide and its analogues (Chen, ; Song et al, ), Fenton's reagents (Argun & Karatas, ), and ozone (Tizaoui & Grima, ). Through direct and indirect oxidation, decolorization is finally achieved.…”

Section: Introductionmentioning

confidence: 99%

A low‐voltage pulse electrolysis method for the degradation of anthraquinone and azo dyes in chloride medium by anodic oxidation on Ti/IrO₂‐RuO₂‐SnO₂ electrodes

Chao

Xue

Jiang

et al. 2019

Water Environment Research

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Wastewater produced by the textile industry containing azo dyes and anthraquinone dyes is significant source of pollution to the environment and is toxic for aquatic life. To overcome the high-energy cost of traditional electrochemical oxidation, a custom-built power supply device for the degradation of anthraquinone and azo dyes by low voltage of 15.0-20.0 V pulsed discharge was investigated. Titanium coated with mixed oxide (Ti/IrO 2 -RuO 2 -SnO 2 ) plates and pure titanium plates were used as the anode and cathode, respectively, for the generation of chlorine in the dye solution. For the anthraquinone dye Reactive Blue 19, 60.0% of the chemical oxygen demand (COD) and 22.0% of the total organic carbon (TOC) were removed using this system. A comparison of the direct current electrolysis and pulsed discharge revealed that using the pulsed discharge method reduced the energy cost by 68.6%. UV-visible, LC-MS, and GC-MS were used to identify the intermediate compounds formed during the degradation of Reactive Blue 19. The results indicate that in the process of oxidation by chlorine/hypochlorite, the chromophore group was first oxidized to -NH 2 , followed by decolorization via chlorination of the aromatic rings. The results confirm that low-voltage pulse electrolysis can be used for the degradation of industrial dyes in waste effluents. © 2019 Water Environment Federation • Practitioner points• Low-voltage pulse electrolysis can be used for the degradation of industrial dyes and/or dyes in waste effluents. • For anionic dye Reactive Blue 19, 60.0% of COD and 22.0% of TOC were removed using low-voltage (20.0 V) pulse electrolysis. • The pulsed discharge method reduced the energy cost of this degradation process by 68.6% compared with direct current electrolysis. • The intermediate compounds formed during the degradation of Reactive Blue 19 were confirmed by UV-visible spectroscopy, LC-MS, and GC-MS.

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“…and suggest possible reaction mechanisms [7,11,25,26], the applicability of AOPs to real wastewater is still an open issue. Therefore, any hypothesis has to be fully validated by means of experimental tests that must be carried out under conditions which must be as close as possible to the real ones.…”

Section: Introductionmentioning

confidence: 99%

H2O2 Based Oxidation Processes for the Treatment of Real High Strength Aqueous Wastes

et al. 2017

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This work was aimed at studying the applicability of H 2 O 2 -based oxidation processes (namely H 2 O 2 /UV, photo-Fenton, and Fenton) for the treatment of six real aqueous wastes. These wastes derived from chemical, pharmaceutical, and detergent production, and were characterised by high COD (chemical oxygen demand) and, in four cases, surfactant concentrations: overall, about 100 tests were conducted. The H 2 O 2 /UV and photo-Fenton processes proved to be very effective in COD removal, the efficiency being greater than 70%. The optimal treatment conditions for the H 2 O 2 /UV process were: 120 min reaction, H 2 O 2 /COD initial dosage ratio = 1/2; the radiation intensity (up to 2000 W·L −1 ) revealed to be a crucial factor, especially in the earlier stage of the process (about 40 min): this aspect can be exploited to reduce the costs related to energy consumption. For the photo-Fenton process the following conditions were chosen: Fe 2+ /H 2 O 2 ratio = 1/30; specific power input = 125 W·L −1 ; H 2 O 2 /COD initial = 1/2; reaction time = 240 min. Photolytic reactions and the presence of dissolved oxygen revealed to be crucial factors for COD removal. The Fenton process, while showing a moderate efficiency (25% COD removal) in the treatment of high loaded wastewaters, provided excellent results in the treatment of aqueous wastes with high content of surfactants. An average yield removal of 70% for non-ionic surfactants (TAS) and 95% for anionic surfactants (MBAS) was obtained, under the following optimal conditions: Fe 2+ /H 2 O 2 = 1/4, H 2 O 2 /COD initial ratio = 1, and contact time = 30 min.

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Application of Fenton process for decolorization of reactive black 5 from synthetic wastewater: Kinetics and thermodynamics

Cited by 53 publications

References 33 publications

Treatment of a dye solution using photoelectro‐fenton process on the cathode containing carbon nanotubes under recirculation mode: Investigation of operational parameters and artificial neural network modeling

Treatment of a dye solution using photoelectro‐fenton process on the cathode containing carbon nanotubes under recirculation mode: Investigation of operational parameters and artificial neural network modeling

A low‐voltage pulse electrolysis method for the degradation of anthraquinone and azo dyes in chloride medium by anodic oxidation on Ti/IrO₂‐RuO₂‐SnO₂ electrodes

H2O2 Based Oxidation Processes for the Treatment of Real High Strength Aqueous Wastes

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Application of Fenton process for decolorization of reactive black 5 from synthetic wastewater: Kinetics and thermodynamics

Cited by 53 publications

References 33 publications

Treatment of a dye solution using photoelectro‐fenton process on the cathode containing carbon nanotubes under recirculation mode: Investigation of operational parameters and artificial neural network modeling

Treatment of a dye solution using photoelectro‐fenton process on the cathode containing carbon nanotubes under recirculation mode: Investigation of operational parameters and artificial neural network modeling

A low‐voltage pulse electrolysis method for the degradation of anthraquinone and azo dyes in chloride medium by anodic oxidation on Ti/IrO2‐RuO2‐SnO2 electrodes

H2O2 Based Oxidation Processes for the Treatment of Real High Strength Aqueous Wastes

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A low‐voltage pulse electrolysis method for the degradation of anthraquinone and azo dyes in chloride medium by anodic oxidation on Ti/IrO₂‐RuO₂‐SnO₂ electrodes