Electrochemical degradation of diazinon from aqueous media using graphite anode: Effect of parameters, mineralisation, reaction kinetic, degradation pathway and optimisation using central composite design

Mahmoudi, Mohammad Molla; Khaghani, Ramin; Dargahi, Abdollah; Tehrani, Ghazaleh Monazami

doi:10.1080/03067319.2020.1742893

Cited by 48 publications

(25 citation statements)

References 39 publications

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“…Hence, it can be inferred that, for pH range 6-9, the major impact on pollutant removal is because of electrolysis time and current. Similar results can be seen in different literatures (Khataee et al, 2010;Molla Mahmoudi et al, 2020).…”

Section: Research Articlesupporting

confidence: 92%

“…The values ≥0.05 define that the model terms are significant or not. In this model, the lack of fit is not significant when compared to pure error which signifies that the response to the model are excellent ( p ‐value > 0.05) (Ahmadzadeh & Dolatabadi, 2018b; Molla Mahmoudi et al., 2020). In the analysis, p ‐value for COD and chloride reduction was calculated as <0.0001 that indicates the developed model is significant.…”

Section: Resultsmentioning

confidence: 95%

“…RESEARCH ARTICLE Dolatabadi, 2018b;Molla Mahmoudi et al, 2020). In the analysis, p-value for COD and chloride reduction was calculated as <0.0001 that indicates the developed model is significant.…”

Section: Research Articlementioning

confidence: 97%

“…Na + and Cl − ions are formed at cathode and anode, respectively. The oxidation of Cl − takes place at anode forming chlorine gas whereas reduction of Na + takes place at cathode forming Na metal at its pure form (Equations 5-8) (Molla Mahmoudi, Khaghani, Dargahi, & Monazami Tehrani, 2020;Tak et al, 2015;Yusuf et al, 2019).…”

Section: Electro-coagulation (Ec) Setupmentioning

confidence: 99%

“…of half-life (t 1∕2 ) were calculated by the Equations (16) and 17, respectively (Dolatabadi & Ahmadzadeh, 2019;Molla Mahmoudi et al, 2020).…”

Section: Research Articlementioning

confidence: 99%

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Techno‐economical optimization using Box–Behnken (BB) design for chemical oxygen demand and chloride reduction from hospital wastewater by electro‐coagulation

Bajpai

Katoch

2020

Water Environment Research

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The study examines the optimum condition of an electro-coagulation (EC) unit for treatment of hospital wastewater (HWW) using iron (Fe) electrodes. The impact of factors such as pH, current, and electrolysis time on COD, chloride, and anode dissolution was investigated. For this purpose, Box-Behnken (BB) design based on the response surface methodology (RSM) was used to design and analyze the results. The predicted value of chemical oxygen demand (COD) and chloride removal at optimum conditions (pH: 7.41, current: 2.64 A and electrolysis time: 41.31 min) were 92.81% and 71.23%, respectively. At same optimum conditions, the value of energy and electrode consumption per kg of COD was 0.06376 kWh/ kg COD and 1.362 kg/kg COD, respectively. High value of R 2 (i.e., R 2 > 99%) for all three responses (Y 1 , Y 2 , and Y 3) obtained from ANOVA confirms that the proposed model is valid, accurate, and acceptable. The kinetic study shows linear relationship and follows pseudo-first-order kinetics. Pareto graph shows that the percentage impact of current factor on COD and chloride removal was maximum, that is, 54.984% and 66.79%, respectively. Lastly, the total cost of EC treatment was calculated in terms of COD removal and was found to be 55.47 ₹/kg COD. © 2020 Water Environment Federation • Practitioner points • Using Fe electrode results in 92.81% COD and 71.23% Chloride removal, respectively. • High value of R 2 > 99% for all three responses from ANOVA confirms the proposed model is valid. • Pareto analysis shows current factor has maximum percentage impact on pollutant removal. • Kinetic study shows linear relationship and follows pseudo-first-order kinetics.

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Section: Research Articlesupporting

confidence: 92%

Section: Resultsmentioning

confidence: 95%

Section: Research Articlementioning

confidence: 97%

Section: Electro-coagulation (Ec) Setupmentioning

confidence: 99%

“…of half-life (t 1∕2 ) were calculated by the Equations (16) and 17, respectively (Dolatabadi & Ahmadzadeh, 2019;Molla Mahmoudi et al, 2020).…”

Section: Research Articlementioning

confidence: 99%

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Techno‐economical optimization using Box–Behnken (BB) design for chemical oxygen demand and chloride reduction from hospital wastewater by electro‐coagulation

Bajpai

Katoch

2020

Water Environment Research

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Exploring the potential of highly efficient graphite/chitosan–PVC composite electrodes in the electrochemical degradation of Reactive Red 4

Halim

Adnan

Lahuri

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND: Previous reported studies revealed that composite electrodes are effective and suitable for wastewater treatment applications owing to their high porosity and increased electrochemical active area. However, the critical challenges to the wider adoption of composite electrodes for environmental applications are the need to reduce the cost of electrode materials, and to improve both their long-term stability and electrocatalytic performance. This study aims to investigate the efficiency and stability of low-cost graphite/chitosan-polyvinyl chloride (C/Chi-PVC) composite electrodes for Reactive Red 4 (RR4) degradation. Toxicity of the treated RR4 wastewater also was investigated using a seed germination test.RESULTS: A cyclic voltammetry study conducted revealed that C 49 /Chi 21 -PVC 30 (49% C, 21% Chi, 30% PVC) showed better electrochemical behaviour for hypochlorous ion (OCl − ) formation, which is responsible for RR4 degradation via indirect electrochemical reaction. Owing to the synergistic effect of both materials, high colour, total organic carbon (TOC) and chemical oxygen demand (COD) removals of 99.61%, 89.68% and 76.35%, respectively, were achieved with less electrode damage at optimum electrolysis parameters. The treated RR4 solution displayed low toxicity after 14 days of exposure to the water sample. The electrode stability in the aggressive OCl − solution was studied by characterization of fresh and used electrodes using field emission scanning electron microscopy with energy-dispersive X-ray spectroscopy (FESEM-EDX). This showed no significant difference in surface roughness and elemental composition; the reusability test confirmed that the electrode can be applied in repeated electrolysis.CONCLUSION: Overall, the fabricated electrode in this study showed high efficiency with robust and durable characteristics for wastewater treatment applications.

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Electrochemical degradation of methyl orange from wastewater by SS/PbO₂‐TiO₂‐SnO₂ composite electrode with and without UV

Thi Tot,

Thuy,

Binh

2024

Vietnam Journal of Chemistry

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SS/PbO2‐TiO2‐SnO2 composite electrode was synthesized by cyclic voltammetry (CV) method. The morphological structure of the composite was studied by scanning electron microscopy (SEM), X‐ray diffraction (XRD), energy dispersive X‐ray spectroscopy (EDX), element‐mapping and thermal gravimetric analysis (TGA). The photoelectrochemical and electrochemical properties were considered in 0.5 m H2SO4 solution with and without UV, respectively. The results indicated that the PbO2‐TiO2‐SnO2 composite had good photoelectrochemical properties due to anodic current and exchange current density increased (31.32% and 48.67%, respectively) under UV irradiation. The composite electrode was used as anode for methyl orange (MO) treatment reached 99.51% under UV irradiation. The kinetic of MO degradation followed the pseudo‐ first order with and without UV (R2 = 0.9528 and 0.9684, respectively). Therefore, TiO2 and SnO2 dopped into PbO2 layer, created a composite with good photoelectrocatalytic activity.

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Electrochemical degradation of diazinon from aqueous media using graphite anode: Effect of parameters, mineralisation, reaction kinetic, degradation pathway and optimisation using central composite design

Cited by 48 publications

References 39 publications

Techno‐economical optimization using Box–Behnken (BB) design for chemical oxygen demand and chloride reduction from hospital wastewater by electro‐coagulation

Techno‐economical optimization using Box–Behnken (BB) design for chemical oxygen demand and chloride reduction from hospital wastewater by electro‐coagulation

Exploring the potential of highly efficient graphite/chitosan–PVC composite electrodes in the electrochemical degradation of Reactive Red 4

Electrochemical degradation of methyl orange from wastewater by SS/PbO₂‐TiO₂‐SnO₂ composite electrode with and without UV

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Electrochemical degradation of diazinon from aqueous media using graphite anode: Effect of parameters, mineralisation, reaction kinetic, degradation pathway and optimisation using central composite design

Cited by 48 publications

References 39 publications

Techno‐economical optimization using Box–Behnken (BB) design for chemical oxygen demand and chloride reduction from hospital wastewater by electro‐coagulation

Techno‐economical optimization using Box–Behnken (BB) design for chemical oxygen demand and chloride reduction from hospital wastewater by electro‐coagulation

Exploring the potential of highly efficient graphite/chitosan–PVC composite electrodes in the electrochemical degradation of Reactive Red 4

Electrochemical degradation of methyl orange from wastewater by SS/PbO2‐TiO2‐SnO2 composite electrode with and without UV

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Product

Resources

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Electrochemical degradation of methyl orange from wastewater by SS/PbO₂‐TiO₂‐SnO₂ composite electrode with and without UV