Electrochemical degradation of methylene blue using electrodes of stainless steel net coated with single-walled carbon nanotubes

Liu, Yao Xing; Liao, Zai Yi; Wu, Xiao Yun; Zhao, Chun; Lei, Yu; Ji, Dao Bin

doi:10.1080/19443994.2014.903524

Cited by 14 publications

(2 citation statements)

References 31 publications

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“…Carbon electrodes such as carbon fiber [55], activated carbon fiber [3], graphite [56], activated carbon [31], [57], carbon nanotube [29], carbon black [58] are used extensively in the electrochemical treatment of wastewater. Carbonaceous material has a high specific surface area, large pore volume, allows the adsorption of phenol on its surface, has good conductivity, also acts as an electron transfer catalyst __________________________________________________________________________________________________________________ ________________________________________________ Egypt.…”

Section: Rh Ho R H Omentioning

confidence: 99%

Phenol Deterioration in Refinery Wastewater through Advanced Electrochemical Oxidation Reactions Using Different Carbon Fiber and Graphite Electrodes Configurations

Abbas

Center³

2022

Egypt. J. Chem.

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Phenolic wastewater was treated electrochemically by various cells consist different arrangements of carbon fiber and graphite electrodes by direct, indirect, and Fenton electrochemical oxidation processes. The oxidation process carried at 35 °C for 180 minutes and at 8 mA/cm 2 current density. One gram of NaCl per liter of electrolyte and 0.4 mM of ferrous ion concentration were used as a catalyst in the indirect and Fenton electrochemical oxidation process, respectively. The results indicated that the effectiveness of graphite-graphite cells in removing phenol via direct and indirect electrochemical removal was the highest of the other cells. In contrast, the cell of a graphite anode and a carbon fiber cathode was the most efficient in removing phenol using the electro-Fenton process, and 55.59% of phenol was removed after 180 minutes. This significant increase in the removal via the electro-Fenton process using carbon fiber as a cathode was due to the large surface area of the cathode, which improves the hydrogen peroxide production rate. The results of the kinetics study of phenol removal by different oxidation processes and by using other cells in the arrangement of the electrodes indicated that the phenol removal reactions followed the first-order kinetics. The extensive study of the reaction rate constant values showed that the electro-Fenton process in a cell of graphite (as an anode) and carbon fiber (as a cathode) cell was faster than the other electro-oxidation processes and cells. Specific power consumption (SPC) was also investigated and showed that the better arrangement is using graphite as an anode that gives the lowest SPC ( 57.1 kWh/kg phenol).

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Section: Rh Ho R H Omentioning

confidence: 99%

Phenol Deterioration in Refinery Wastewater through Advanced Electrochemical Oxidation Reactions Using Different Carbon Fiber and Graphite Electrodes Configurations

Abbas

Center³

2022

Egypt. J. Chem.

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“…They have high surface, high porosity, corrosion resistance, and offer lowpressure drops compared to other materials because they have a large space. Examples of these electrodes are graphite [33][34][35], reticulated vitreous carbon [36], activated carbon fibers [37], and carbon nanotubes [38]. This study uses the Taguchi approach to investigate the electro-Fenton oxidation process of organic pollutants in refinery wastewater.…”

Section: Fe E Fementioning

confidence: 99%

The Taguchi Approach in Studying and Optimizing the Electro-Fenton Oxidation to Reduce Organic Contaminants in Refinery Wastewater Using Novel Electrodes

Abbas

Abbas²

2022

Eng. Technol. Appl. Sci. Res.

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This study investigated the degradation of organic pollutants using an advanced electrochemical oxidation technique in a batch reactor cell consisting of a graphite anode, modified by electrodeposition of PbO2, and a graphene-modified carbon fiber cathode. The experiment was designed by the Taguchi design approach with an orthogonal array of L18 to study and optimize the degradation of Chemical Oxygen Demand (COD) by the electro-Fenton oxidation process. Four process parameters, Current Density (CD), Temperature, Fe2+ concentration, and time were measured at different levels. The impact of each factor was analyzed by analysis of variance (ANOVA). Furthermore, a linear model analysis was applied for the Signal-to-Noise (S/N) ratio and mean values, obtaining the optimal conditions. The most significant parameter of the COD removal efficiency was time, and the least one was temperature.

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A comparative study on the mineralization of waste butyl acetate by electrochemical oxidation via persulphate/hypochlorite and silver (II) reagents using DSA® anodes: Statistical optimization by response surface methodology

Mokhtari

Mohammadi

2023

Can J Chem Eng

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Mediated electrochemical oxidation of butyl acetate (BA) in wastewater was conducted by employing two different techniques based on S2O8−2/ClO− and Ag (II) reagents using commercial Dimensionally Stable Anode (DSA)®‐O2 or DSA®‐Cl2 anodes. Response surface methodology (RSM) was also engaged to investigate process parameters impacts and their interactions on BA mineralization efficiency and energy consumption. Fourier‐transform infrared spectroscopy (FT‐IR), UV–visible, and gas chromatography (GC) analyses confirmed BA mineralization and the optimum removal conditions were then attained for both systems. Chemical oxygen demand (COD) analysis showed that electro‐oxidation by mixed persulphate/hypochlorite oxidants favours the mineralization of BA (99.7%) compared to the Ag (II) technique (96.56%). The higher removal efficiency obtained by S2O8−2/ClO− was achieved in a neutral aquatic medium using DSA®‐Cl2 at a lower current density (CD), temperature, and electrolysis time (pH: 6, CD: 0.1 kA/m2, and time: 60 min) compared to those obtained by Ag (II) ions (pH: ≤3, CD: 1.69 kA/m2, and time: 130 min). The former process occurred under the charge transfer control mechanism at low CDs, whereas at an elevated CD (about 1.0 kA/m2), mass transfer was predominant due to the parasitic oxygen evolution. On the other hand, the latter process was found charge transfer‐controlled at low BA concentrations (≤200 ppm), whereas it turned out mass transfer‐controlled at higher BA concentrations. Comparing the anode type, energy consumption for BA mineralization by S2O8−2/ClO− ions using DSA®‐Cl2 at the optimum conditions was 0.009 kW · h/dm3, which was about three times lower than that of the DSA®‐O2 anode.

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Electrochemical degradation of methylene blue using electrodes of stainless steel net coated with single-walled carbon nanotubes

Cited by 14 publications

References 31 publications

Phenol Deterioration in Refinery Wastewater through Advanced Electrochemical Oxidation Reactions Using Different Carbon Fiber and Graphite Electrodes Configurations

Phenol Deterioration in Refinery Wastewater through Advanced Electrochemical Oxidation Reactions Using Different Carbon Fiber and Graphite Electrodes Configurations

The Taguchi Approach in Studying and Optimizing the Electro-Fenton Oxidation to Reduce Organic Contaminants in Refinery Wastewater Using Novel Electrodes

A comparative study on the mineralization of waste butyl acetate by electrochemical oxidation via persulphate/hypochlorite and silver (II) reagents using DSA® anodes: Statistical optimization by response surface methodology

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