A critical review in electrocoagulation technology applied for oil removal in industrial wastewater

Shokri, Aref; Fard, Mahdi Sanavi

doi:10.1016/j.chemosphere.2021.132355

Cited by 76 publications

(24 citation statements)

References 129 publications

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“…EC treatment for higher MO concentrations ( Figure 2 and Figure 3 ) also represented limiting treatment performance and higher electrolysis time was required for satisfactory treatment performance. A combination of EC with other treatment techniques is recommended by several authors to achieve satisfactory treatment performance ( Kabdaşlı et al., 2012 ; Shokri and Fard, 2022 ; Turan, 2020 ). With the objective to obtain satisfactory treatment performance, EC in combination with chemical coagulation (CC) was applied for MO dye solution treatment following other research studies ( Bazrafshan et al., 2016 ; Shamaei et al., 2018 ).…”

Section: Resultsmentioning

confidence: 99%

Effect of additional Fe2+ salt on electrocoagulation process for the degradation of methyl orange dye: An optimization and kinetic study

Akter

Islam

2022

Heliyon

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Section: Resultsmentioning

confidence: 99%

Effect of additional Fe2+ salt on electrocoagulation process for the degradation of methyl orange dye: An optimization and kinetic study

Akter

Islam

2022

Heliyon

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Section: Introductionmentioning

confidence: 99%

“…The stability of O/W emulsions mainly depends on the amount of resins and asphaltenes in crude oils and their ratios. A lower resin/asphaltene (R/A) ratio leads to higher emulsion stability. , Oily wastewater contains toxic materials (e.g., benzene, toluene, and polycyclic aromatic compounds), which can pose severe risks to the aquatic environment if discharged without proper treatment. , Strict regulations are being implemented in North America to limit the discharge of oil and grease in oily wastewater to a monthly average of 29 mg/L and a daily maximum of 42 mg/L …”

Section: Introductionmentioning

confidence: 99%

“…3,10 Strict regulations are being implemented in North America to limit the discharge of oil and grease in oily wastewater to a monthly average of 29 mg/L and a daily maximum of 42 mg/L. 11 Different oily wastewater treatment processes have been used, including gravity separation, biological treatment, plate coalescence, gas flotation, and filtration. Their efficiency depends on the oil droplet size distribution in wastewater.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Dioctyl Sodium Sulfosuccinate in Demulsifying Crude Oil-in-Water Emulsions

Hassanshahi

2022

ACS Omega

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This research investigated the performance of dioctyl sodium sulfosuccinate (DSS), a double-chain anionic surfactant, in breaking crude oil-in-water emulsions. The response surface methodology was used to consider the effect of the DSS concentration, oil concentration, and shaking time on demulsification efficiency and obtain optimum demulsification conditions. Further single-factor experiments were conducted to investigate the effects of salinity, crude oil conditions (fresh and weathered), and gravity separation settling time. The results showed that DSS efficiently demulsified stable emulsions under different oil concentrations (500–3000 mg/L) within 15 min shaking time. Increasing DSS concentration to 900 mg/L (critical micelle concentration) increased the demulsification efficiency to 99%. DSS not only improved the demulsification efficiency but also did not impede the demulsifier interfacial adsorption at the oil–water interface due to the presence of the double-chain structure. The low molecular weight enables the homogeneous distribution of DSS molecules in the emulsion, leading to a high demulsification efficiency within 15 min. Analysis of variance results indicated the importance of considering the interaction of oil concentration and shaking time in demulsification. DSS could reduce the total extractable petroleum hydrocarbons in the separated water to <10 mg/L without gravity separation and could achieve promising demulsification performance at high salinity (36 g/L) and various concentrations of fresh and weathered oil. The demulsification mechanism was explained by analyzing the microscopic images and the transmittance of the emulsion. DSS could be an efficient double-chain anionic surfactant in demulsifying stable oil-in-water emulsions.

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“…Different studies with different approaches like electrochemical, biological, oxidation, adsorption, and coagulation have been performed to as much as possible decrease and remove different undesirable compounds in water sources. In the view of the current scenario, with a gradual reduction in water resources, the advanced oxidation processes (AOPs) have garnered substantial attention due to the ability to degradation of organic pollutants to inorganic ions, CO 2 , H 2 O, or other innocuous compounds (Shokri 2019;Zhang et al 2019;Shokri and Fard 2022). The degradation of organic contaminants such as surfactants, pharmaceuticals, antibiotics phenolic compounds, dye molecules, herbicides, pesticides is quite di cult (Zhao et al 2016;Shokri 2018;Ren et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Electro-Fenton Process with Emphasis on its Challenges and Future Prospects for Wastewater Treatment: A review

Shokri

Fard

2022

Preprint

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The efficiency of heterogeneous electro-Fenton technology on the degradation of recalcitrant organic pollutants and for an extensive kind of wastewaters with the purpose of addressing ever-increasing water-related challenges is incontrovertible. Due to its outstanding performance, eco-friendliness, easy automation, and operability over a wide range of pH, it has garnered significant attention from researchers and different industries to invest in its application. This review paper, briefly discusses the principal mechanism of the electro-Fenton process, crucial properties of a highly efficient heterogeneous catalyst, the heterogeneous electro-Fenton system enabled with Fe-functionalized cathodic materials besides its essential operational parameters. Moreover, the authors comprehensively explored the major challenges that prevent commercialization of the electro-Fenton process and present future research direction with specific emphasis on the following areas for addressing those disconcerting challenges: synthesizing heterogeneous catalysts by application of advanced materials for improving its reusability and stability, exhaustive analysis of H2O2 activation mechanism, life-cycle assessment of potential environmental effects, scale-up from lab-scale to industrial scale, fabrication of electrodes with state-of-the-art technologies, using the electro-Fenton process for remediation of biological contaminants, application of different cells in electro-Fenton process, hybridization of the electro-Fenton with other wastewater treatments technologies and full-scale analysis of economic costs.

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A critical review in electrocoagulation technology applied for oil removal in industrial wastewater

Cited by 76 publications

References 129 publications

Effect of additional Fe2+ salt on electrocoagulation process for the degradation of methyl orange dye: An optimization and kinetic study

Effect of additional Fe2+ salt on electrocoagulation process for the degradation of methyl orange dye: An optimization and kinetic study

Investigation of Dioctyl Sodium Sulfosuccinate in Demulsifying Crude Oil-in-Water Emulsions

Electro-Fenton Process with Emphasis on its Challenges and Future Prospects for Wastewater Treatment: A review

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