Electrochemical Degradation of Reactive Black 5 Using Three-Dimensional Electrochemical System Based on Multiwalled Carbon Nanotubes

Mengelīzadeh, Nezamaddin; Pourzamani, Hamidreza; Saloot, Morteza Khodadadi; Hajizadeh, Yaghoub; Parseh, Iman; Parastar, Saeed; Niknam, Noureddin

doi:10.1061/(asce)ee.1943-7870.0001517

Cited by 23 publications

(5 citation statements)

References 73 publications

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“…According to this Figure, reactive species such as •OH with cleavage of the azo group (NN) of the AO10 led to the production of organic compounds with low molecular weight. Byproducts identified in the present study were similar to those observed in other studies conducted by 3D electrochemical, photocatalytic and heterogeneous Fenton coupled with ultrasonic processes …”

Section: Intermediates Produced During the Degradation Of Ao10supporting

confidence: 90%

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Optimization of the 3D electro‐Fenton process in removal of acid orange 10 from aqueous solutions by response surface methodology

Mohammadi

Alinejad

Khajeh

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND In recent decades, rapid population growth and industrial development have led to the release of toxic compounds into water resources. Several technologies have been proposed to address the problem, and among them, the 3D electro‐Fenton process has found great popularity due to its high efficiency and simple operation. In the 3D electro‐Fenton process, the type of particle electrode is one of the most important factors owing to its impact on the reduction of energy consumption and generation of reactive species. In the present study, the optimization of the 3D electro‐Fenton process coupled with iron‐coated nickel foam (NF‐Fe), as a new particle electrode, in the removal of acid orange 10 was investigated using response surface methodology (RSM). RESULTS The RSM results showed that the quadratic model has a high R2 and high F‐value based on ANOVA analysis. The optimum efficiency of dye removal (99.15%) was obtained at pH 5.6, an NF‐Fe dosage of 0.68 g L−1, a time of 34.6 min, and current density of 23.62 mA cm−2. Comparative tests showed the high efficiency of the 3D electro‐Fenton process compared to other electrochemical systems. Quenching experiments demonstrated the production of different reactive species in the 3D process. The stability experiment proved that the NF‐Fe has a high potential to improve the long‐term degradation of dye. CONCLUSIONS Due to its high efficiency, production of more reactive species and excellent stability of the NF‐Fe electrode, this 3D electro‐Fenton process is an excellent option for removal of dye from aqueous solutions. © 2019 Society of Chemical Industry

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Section: Intermediates Produced During the Degradation Of Ao10supporting

confidence: 90%

“…Figure (a) shows the chromatogram corresponding to the sample taken from the reaction solution. Based on the results of the chromatogram and previous studies, a possible reaction pathway was proposed for the degradation of AO10 by the 3DEF process [Fig. (b)].…”

Section: Intermediates Produced During the Degradation Of Ao10mentioning

confidence: 99%

Optimization of the 3D electro‐Fenton process in removal of acid orange 10 from aqueous solutions by response surface methodology

Mohammadi

Alinejad

Khajeh

et al. 2019

J of Chemical Tech & Biotech

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“…They showed the existence of synergistic phenomena in the combined process, resulting in a higher total organic carbon (TOC) removal than the individual processes or the equivalent 2D process. Multiwalled carbon nanotubes (MWCNTs) were used by Mengelizadeh et al in their 3D EAOP system for Reactive Black 5 (RB5) degradation, resulting in higher • OH production than in the 2D system [20]. In addition, the removal of RB5 increased with increasing particle electrode concentration.…”

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confidence: 99%

Using Sawdust Derived Biochar as a Novel 3D Particle Electrode for Micropollutants Degradation

Πεταλά

Bampos

Frontistis

2022

Water

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This work examined the use of a 3D combined electrochemical process based on particle electrodes from sawdust-derived biochar pyrolized at T = 550–850 °C to remove persistent pollutants. The as-prepared biochar was characterized by scanning electron microscopy with an X-ray energy dispersive spectrometer (SEM/EDS), nitrogen adsorption (BET method) and X-ray diffraction (XRD) techniques. The use of sawdust biochar pyrolized at 650 °C led to a significant increase in efficiency against the sum of conventional 2D electrochemical systems and adsorption, and the synergy index estimated equal to 74.5% at optimum conditions. Sulfamethoxazole (SMX) removal was favored by increasing particle electrode loading. Despite that, the reaction was slightly favored in near-neutral conditions; the system retained most of its activity in the pH range 3–10. The proposed 3D system could degrade different micropollutants, namely SMX, Bisphenol A (BPA), Propylparaben (PP), and Piroxicam (PR). Of particular interest was that no significant reduction in degradation was observed in the case of complex or real water matrices. In addition, the system retained its efficiency regarding SMX removal after five sequential experiments in the 3D combined electrochemical process. However, further investigation is needed to estimate the contribution of the different mechanisms of micropollutant removal in the proposed system.

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“…The traditional 2D electrochemical reactor, including cathodes and anodes, has the mass transfer limitation and the low area-volume ratio [20][21][22]. On the other hand, 3D electrochemical reactor promotes the mass transfer efficiency, current efficiency, and decreases the energy consumption, whereas relatively low cyclic stability is still an issue [23][24][25].During the process of pollutants oxidization in the 2D reactor, the DSA electrode became inactive due to corrosion and the coatings dispersed in solution that also cannot be recycled, which result in serious material waste [26]. In our previous work [27,28], a new electrolytic cell type named 2.5D electrode system was proposed, as shown in Scheme 1.…”

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A 2.5D Electrode System Constructed of Magnetic Sb–SnO2 Particles and a PbO2 Electrode and Its Electrocatalysis Application on Acid Red G Degradation

et al. 2019

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A novel electrode consisting of a Ti/PbO2 shell and Fe3O4/Sb–SnO2 particles was developed for electrochemical oxidation treatment of wastewater. Scanning electron microscope (SEM), X-ray diffraction (XRD), the current limiting method, toxicity experiments, and high-performance liquid chromatography were adopted to characterize its morphology, crystal structure, electrochemical properties, the toxicity of the wastewater, and hydroxyl radicals. Acid Red G (ARG), a typical azo dye, was additionally used to test the oxidation ability of the electrode. Results indicated that the 2.5D electrode could significantly improve the mass transfer coefficient and •OH content of the 2D electrode, thereby enhancing the decolorization, degradation, and mineralization effect of ARG, and reducing the toxicity of the wastewater. The experiments revealed that, at higher current density, lower dye concentration and higher temperature, the electrochemical oxidation of ARG favored. Under the condition of 50 mA/cm2, 25 °C, and 100 ppm, the ARG, Chemical Oxygen Demand (COD) and Total Organic Carbon (TOC) removal efficiency reached 100%, 65.89%, and 52.52%, respectively, and the energy consumption and the current efficiency were 1.06 kWh/g COD, 8.29%, and energy consumption for TOC and mineralization current efficiency were 3.81 kWh/g COD, 9.01%. Besides, the Fe3O4/Sb–SnO2 particles after electrolysis for 50 h still had remarkable stability. These results indicated that the ARG solution could be adequately removed on the 2.5D electrode, providing an effective method for wastewater treatment.

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Electrochemical Degradation of Reactive Black 5 Using Three-Dimensional Electrochemical System Based on Multiwalled Carbon Nanotubes

Cited by 23 publications

References 73 publications

Optimization of the 3D electro‐Fenton process in removal of acid orange 10 from aqueous solutions by response surface methodology

Optimization of the 3D electro‐Fenton process in removal of acid orange 10 from aqueous solutions by response surface methodology

Using Sawdust Derived Biochar as a Novel 3D Particle Electrode for Micropollutants Degradation

A 2.5D Electrode System Constructed of Magnetic Sb–SnO2 Particles and a PbO2 Electrode and Its Electrocatalysis Application on Acid Red G Degradation

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