Optimized electro-Fenton process with sacrificial stainless steel anode for degradation/mineralization of ciprofloxacin

Shoorangiz, Mostafa; Nikoo, Mohammad Reza; Salari, Marjan; Rakhshandehroo, Gholamreza; Sadegh, Mojtaba

doi:10.1016/j.psep.2019.10.011

Cited by 47 publications

(17 citation statements)

References 61 publications

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“…The RSM as a collection of statistical and mathematical techniques that fit a polynomial equation was used in this work to find the best value of each factor and give the optimized RhB degradation rate % as a response value [59][60][61]. Therefore, central composite design (CCD) was chosen to investigate the linear, quadratic, and interaction effects of four independent variables (Tables S3 and S4).…”

Section: Electrocatalytic Degradation Of Rhb Using Response Surface Methodologymentioning

confidence: 99%

Barium Hydrogen Phosphate Electrodes for High Electrocatalytic and Photoelectrocatalytic Degradation of Rhodamine B in Neutral Medium: Optimization by Response Surface Methodology

et al. 2020

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Barium hydrogen phosphate (BaHPO 4 ) thin films were electrodeposited on fluorine-doped tin oxide (FTO) and used as electrocatalysts for organics degradation. The effects of applied current density and deposition time on the phase and morphology of electrodeposited films were analyzed with X-ray diffraction (XRD), scanning electron microscopy (SEM), attenuated total reflectance-Fourier-transform infrared (ATR-FTIR) spectroscopy, Raman spectroscopy, electrochemical impedance spectroscopy (Mott-Schottky) plots, and photocurrent response. The electrodeposited BaHPO 4 films crystallize in the orthorhombic structure and form platelets on the FTO substrate. Response surface methodology (RSM) was used to optimize the operational conditions. Four independent process variables were considered: NaCl concentration, rhodamine B (RhB) initial concentration, applied current density, and reaction time. Based on the model prediction, the optimum conditions for RhB degradation were determined with the maximum RhB degradation of 98.78%. The corresponding experimental value of RhB degradation under the optimum conditions was determined as 99%, which is very close to the optimized one, implying that RSM is a powerful strategy for the process optimization. The photoelectrochemical degradation of RhB, performed at optimal operational conditions, allowed the very fast degradation rates of almost 99% during 7 min due to the synergic effect while combining photocatalysis and electrocatalysis.

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Section: Electrocatalytic Degradation Of Rhb Using Response Surface Methodologymentioning

confidence: 99%

Barium Hydrogen Phosphate Electrodes for High Electrocatalytic and Photoelectrocatalytic Degradation of Rhodamine B in Neutral Medium: Optimization by Response Surface Methodology

et al. 2020

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“…where A0 is the absorbance of the solution before the reaction of the dye; A is the absorbance of the dye solution after different times of treatment [16].…”

Section: Removal Rate ＝mentioning

confidence: 99%

“…When the electrode spacing was 2 cm, the ARG removal rate was the highest, further increasing the electrode spacing, the asobtained removal rates gradually decreased. The electrode spacing was determined by the magnitude of the electric field strength in the cell and the potential difference between the liquid phase and the anode [16]. When the spacing between the plates was 1 cm, the anode and cathode were too close to each other, so the •OH and other strong oxidizing intermediate products produced by Fenton reagent were directly reduced at the cathode, without enough time to oxidize the targeted organic pollutants [37].…”

Section: Effect Of the Electrode Gapmentioning

confidence: 99%

Process optimization and mechanism study of acid red G degradation by electro-Fenton- Feox process as an in situ generation of H2O2

Sun¹,

Yao²,

Wei³

et al. 2021

Turk J Chem

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Dye contaminated wastewaters are industrial wastewaters that are difficult to be treated using traditional biochemical and physicochemical methods. In the present work, the acid red G was removed as a model pollutant by the Electro-Fenton Process for the first time. The anode and cathode used by the Electro-Fenton Process were iron plate and graphite felt, respectively. Optimizing the process, it was concluded that under the conditions of current density= 20 mA cm-2 , pH= 3 and initial Na2SO4 concentration= 0.2 M, the removal rate of acid red G with an initial concentration of 300 mg L-1 could reach 94.05% after 80 min of electrolysis. This reveals that the EF-Feox Process used in this work has an excellent removal efficiency on acid red G. The required reagents (Fe 2+ , H2O2) were generated by the electrode reaction, while the optimal generation conditions and mechanism of •OH, H2O2 and Fe 2+ were investigated. By testing •OH, H2O2, and Fe 2+ agents at different pH and current densities, it was revealed that the Electro-Fenton reaction was most efficient when the current density was 20 mA cm-2, and the pH was 3. Moreover, the removal rate of ARG is consistent with first-order reaction kinetics.

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“…31,32 Notably, in this process, homogeneous free cOH can be generated via the fundamental chemical reaction between in situ electrogenerated hydrogen peroxide (H 2 O 2 ) and ferrous ions (Fe 2+ ) to degrade or mineralize a wide variety of organic pollutants into non-toxic or low molecular weight compounds. 12,33,34 However, applying external energy in EF process can result in high operating costs, particularly if complete mineralization is required. 15 In recent investigations, the renewable bioenergy technologies, such as bio-electrochemical systems (as microbial fuel cell (MFC) and microbial electrolysis cell (MEC)), 5,[35][36][37] nanotechnology, 3,38 photocatalytic methods, [39][40][41] biological and biochemical technologies, 42 and other methods have been considered for bioenergy generation and resource recovery.…”

Section: Introductionmentioning

confidence: 99%

A novel bio-electro-Fenton system with dual application for the catalytic degradation of tetracycline antibiotic in wastewater and bioelectricity generation

et al. 2021

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Optimized electro-Fenton process with sacrificial stainless steel anode for degradation/mineralization of ciprofloxacin

Cited by 47 publications

References 61 publications

Barium Hydrogen Phosphate Electrodes for High Electrocatalytic and Photoelectrocatalytic Degradation of Rhodamine B in Neutral Medium: Optimization by Response Surface Methodology

Barium Hydrogen Phosphate Electrodes for High Electrocatalytic and Photoelectrocatalytic Degradation of Rhodamine B in Neutral Medium: Optimization by Response Surface Methodology

Process optimization and mechanism study of acid red G degradation by electro-Fenton- Feox process as an in situ generation of H2O2

A novel bio-electro-Fenton system with dual application for the catalytic degradation of tetracycline antibiotic in wastewater and bioelectricity generation

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