A study on electrochemical oxidationof phenol for wastewater remediation

Divya, N A; Sreerag, A V; Yadukrishna,; Joseph, Tiwin; Soloman, P A

doi:10.1088/1757-899x/1114/1/012073

Cited by 3 publications

(1 citation statement)

References 10 publications

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“…The electrodes were connected to the DC power supply (MASHENG; MS-605D), and a constant CD was applied to the electrolytic cell for a specified time. Indirect oxidation was used in this study, so 3 g/l of NaCl (Divya et al, 2021) was added to the solution, several drops of H 2 SO 4 were added to make the pH equal to 3, and the temperature of the electrolyte was maintained at about 25°C ± 2.…”

Section: Sonoelectrochemical Processmentioning

confidence: 99%

Modified Graphite with Tin Oxide as a Promising Electrode for Reduction of Organic Pollutants from Wastewater by Sonoelectrochemical Oxidation

Nsaif,

Majeed

2024

Ecol. Eng. Environ. Technol.

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Most of the studies on tin oxide coatings as electrode materials were conducted on titanium; in this study, the aim was to create pure tin oxide (SnO 2 ) films on graphite substrate, which is more prevalent than titanium. There is a lack in investigation the effect of SnCl 2 and HNO 3 concentrations on the prepared SnO 2 electrode; therefore, the aim of this work was to study these effects precisely. Also, no previous study investigated the removal of phenol sonoelectrochemically by a SnO 2 electrode, which would be accomplished in the present work. The tin dioxide electrode was produced by cathodic electrodeposition using a SnCl 2 •2H 2 O solution in the presence of HNO 3 and NaNO 3 on a graphite plate substrate. The impact of various operating parameters (current density -CD, HNO 3 concentration, and SnCl 2 •2H 2 O concentration) on the morphology and structure of the SnO 2 deposit layer was thoroughly investigated. The physical structures of the SnO 2 film were determined by X-ray diffraction (XRD), surface morphology was characterized using field-emission scanning electron microscopy (SEM), and chemical composition was analyzed using energy-dispersive X-ray spectroscopy (EDX). In a batch reactor, the sonoelectrochemical oxidation of phenol was tested to determine the performance of the best SnO 2 electrodes for phenol degradation and any organic byproducts. It was discovered that 10 mA/cm 2 , 50 mM of SnCL 2 •2H 2 O, and 250 mM of HNO 3 were the optimum conditions to prepare SnO 2 electrodes, which produced the smallest crystal size, with no appeared cracks, and gave the best phenol removal. The best prepared electrode was tested in the sonoelectrochemical oxidation of phenol with two different electrolytes and different CD, and the results showed that the phenol removal was 76.87% and 64.68% when using NaCl and Na 2 SO 4 , respectively, as well as was 63.39, 76.87, and 100% for CD at 10, 25, and 40 mA/cm 2 , respectively.

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Section: Sonoelectrochemical Processmentioning

confidence: 99%

Modified Graphite with Tin Oxide as a Promising Electrode for Reduction of Organic Pollutants from Wastewater by Sonoelectrochemical Oxidation

Nsaif,

Majeed

2024

Ecol. Eng. Environ. Technol.

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Electrocatalytic removal of phenol from coking wastewater using coal based electrode materials

Su,

Xianyu,

Wang

et al. 2023

International Journal of Electrochemical Science

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Adsorption synergy electrocatalytic degradation of phenol by active oxygen-containing species generated in Co-coal based cathode and graphite anode

Su,

Wang,

Xianyu

et al. 2023

Green Processing and Synthesis

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The coal base electrodes and efficient coal base loaded cobalt electrodes (Co-CE) were prepared by pyrolysis method of low rank coal united activation method of KOH in order to develop more pores structures. The morphology of electrodes were characterized by Scanning electron microscopy, meanwhile, the type of elements were detected by energy dispersive spectroscopy (EDS). The electrochemical performance of electrodes were tested by cyclic voltammetry and electrochemical impedance spectroscopy. The lamella structures and pores were observed in microtopography of electrodes and the cobalt were successfully loaded in Co-CE from the EDS analysis. The operating conditions of processing time, current density, electrolyte concentration, pH and initial phenol concentration on this electrochemical system in single factor experiment were separately explored, correspondingly, the value was 180 min, 40 mA·cm−2, 0.01 mol·L−1, 2, 100 mg·L−1, and the phenol removal rate (R) were at the range of 47.64–67.84%. In the optimization experiment of JMP design, the removal rate could reach at 83.47%. The response surface methodology was employed for optimizing operation conditions to improve R. And the prediction model obtained for the response can be represented as: R = 66.5275 + 6.7311X 1 – 5.4197X 4 – 5.2303X 5 + 4.9555X 1 2 – 12.5219X 2 2 – 6.2912X 4 2 + 16.0937X 5 2 + 2.4109X 2 X 4 – 7.910X 3 X 4 – 3.0123X 3 X 5 – 2.183X 4 X 5. The optimized conditions were pH 3, 100 mg·L−1 of phenol concentration, 0.1 mol/L of electrolyte concentration, 35 mA/cm2 of current density, and 180 min of processing time. Meanwhile, the predicted R was 90.86%, the actual R of three parallel experiments were 91.2%, 89.3%, 91.05%, which were well consistent with the predicted value. Additionally, the degradation mechanism was proposed as that the adsorption in pore structures synergy electrocatalytic effect of Co-CE. Micro-electric fields formed in pores and the transition metal catalysis accelerated the transformation of cathode hydrogen peroxide to generate hydroxyl radical (·OH). Furthermore, the ·OH were produced both by cathode and anode which promoted the degradation of phenol. This high catalytic activity and low cost Co-CE is a kind of prospective electrode for electrochemical degradation of phenolic wastewater.

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A study on electrochemical oxidationof phenol for wastewater remediation

Cited by 3 publications

References 10 publications

Modified Graphite with Tin Oxide as a Promising Electrode for Reduction of Organic Pollutants from Wastewater by Sonoelectrochemical Oxidation

Modified Graphite with Tin Oxide as a Promising Electrode for Reduction of Organic Pollutants from Wastewater by Sonoelectrochemical Oxidation

Electrocatalytic removal of phenol from coking wastewater using coal based electrode materials

Adsorption synergy electrocatalytic degradation of phenol by active oxygen-containing species generated in Co-coal based cathode and graphite anode

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