A systematic diagnosis of state of the art in the use of electrocoagulation as a sustainable technology for pollutant treatment: An updated review

Mousazadeh, Milad; Naghdali, Zohreh; Al-Qodah, Zakaria; Alizadeh, Seyed Mehdi Seyed; Niaragh, Elnaz Karamati; Malekmohammadi, Sima; Nidheesh, P.V.; Roberts, Edward P.L.; Sillanpää, Mika; Emamjomeh, Mohammad Mahdi

doi:10.1016/j.seta.2021.101353

Cited by 40 publications

(22 citation statements)

References 247 publications

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“…The factors used for the design of experiments were selected according to the literature (Mousazadeh et al, 2021), focusing mainly on current (since the reactions to electrogenerate the coagulant depend on it), the reaction time (because of the amount of coagulant), and the supporting electrolyte (which depends on it too), to determine the effectiveness of the applied current.…”

Section: Experimental Designmentioning

confidence: 99%

“…4) benefits the separation of the light flocs by the electroflotation process. Additionally, the bubbles contribute to the hydrodynamics of the reactor through convection, favoring quick contact among the species so that with the treatment time, the flocs increase in size, generating the coagulation process, and finally precipitation occurs (see Figure 6) (Mousazadeh et al, 2021;Shakeri et al, 2021).…”

Section: Initial Ph Effectmentioning

confidence: 99%

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Optimization of the Electrocoagulation Process with Aluminum Electrodes for Rainwater Treatment

Morales-Figueroa

Teutli-Sequeira

Linares-Hernández

et al. 2022

Front. Environ. Sci.

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Rainwater collected in the Toluca region of Mexico with a pH of 6.25 was treated with an electrochemical process, and the efficiency of two supporting electrolytes were compared, one food grade (sea salt) and the other reagent grade (sodium sulfate). In the first stage, rainwater was characterized to detect the COD content, turbidity, metals such as zinc, iron, aluminum, and lead. Electrocoagulation treatment was performed with an electrochemical cell using aluminum electrodes to study the effect on COD and turbidity, as well as the removal of heavy metals present. The results obtained with response surface methodology and a central composite design reveal that the optimal conditions of the electrocoagulation treatment were a current density of 3.26 mA/cm2 and a time of 11.38 min. Using sodium sulfate, the percentage of turbidity removal is 99.27% and COD 70.83%. The use of sea salt as a support electrolyte in these conditions allowed the removal of COD at 100%, turbidity at 100%, and Al 100%, Mn 84.29%, Zn 97.97%, Pb 46%, Fe 21%. Energy costs that are low lead to proven savings when using this system, indicating that this treatment is an option to both improve rainwater conditions and be able to make use of it safely.

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Section: Experimental Designmentioning

confidence: 99%

Section: Initial Ph Effectmentioning

confidence: 99%

Optimization of the Electrocoagulation Process with Aluminum Electrodes for Rainwater Treatment

Morales-Figueroa

Teutli-Sequeira

Linares-Hernández

et al. 2022

Front. Environ. Sci.

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“…Electrocoagulation is the applying of current to electrodes submerged in wastewater to produce insitu metal coagulants which adsorbs the dissolved pollutants. The larger aggregates formed now either float or settle [6]. The use of same or different materials for electrodes or conductive metal plates is applicable for electrocoagulation process.…”

Section: Introductionmentioning

confidence: 99%

Performance of electrocoagulation process for copper removal in simulated artisanal and small-scale mining wastewater

Almendral

Tayo

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Electrocoagulation treatment was applied in the simulated artisanal and small-scale mining wastewater for 60 minutes. Copper concentration of 625 mg.L−1 was used in the study which was based on the real artisanal and small-scale mining wastewater (conductivity = 13 mS.cm−1, initial pH = 10) collected from Paracale, Camarines Norte, Philippines. Batch experiments using a pair of iron electrodes with an interelectrode distance of 2 cm were used for this study and we have determined the optimized conditions such as conductivity, initial pH, and current density for the various electrocoagulation runs. Decreasing initial conductivity and pH of real mining wastewater while increasing current density favours higher removal efficiency. With the conductivity of 3.5 mS.cm−1, initial pH of 9, and current density of 33.5 mA.cm−2, copper removal efficiency was 93.5%. Based on these operating conditions, energy consumption was 36.82 kWhr.m−3 and electrodes consumption were 2.09 kg.m−3. This study revealed that electrocoagulation is feasible to treat higher concentrations of copper present in mining wastewater.

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“…This phenomenon makes it difficult to predict the behavior of electrochemical wastewater treatment systems (Abdelhay et al., 2021). Electrochemical approaches for the removal of contaminants from wastewater have been the subject of recent research (Mousazadeh, Naghdali, et al., 2021). Various electrode materials have been examined and found to be promising techniques for eradicating practically all types of organics in wastewater, depending on the uses.…”

Section: Introductionmentioning

confidence: 99%

Treatment of livestock slaughterhouse wastewater by the electrochemical method using stainless steel and copper electrodes

Mkilima

2022

Environmental Quality Mgmt

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Electrochemical methods provide one of the most effective approaches for wastewater treatment. However, the performance of these systems is highly dependent on the type of wastewater to be treated and the electrode material used (including some relatively cheap and readily available materials such as stainless‐steel and copper). Unfortunately, the applicability of stainless steel as anode and copper as cathode electrodes materials for the purification of livestock slaughterhouse wastewater has not been captured in the previous studies. This study investigated the potential of combining stainless steel (anode) and copper (cathode) as electrode materials for the purification of livestock wastewater. The influence of contact time (20, 40, and 60 min) on the pollutants’ removal efficiency was also investigated. From the analysis results, it was observed that the contact time and type of pollutant to be removed had a significant influence on the removal efficiency of the electrochemical treatment system. The highest removal efficiency was achieved from the combination of TSS and 60‐min contact time, with 92% removal efficiency. While the lowest removal efficiencies was observed from the combination of phosphates, nickel, aluminum, and ammonia and 10 min contact time; with removal efficiencies of 22.6%, 23.4%, 34.3%, and 34.3%, respectively. However, in terms of general removal efficiency (after 60 min of the contact time), the lowest removal efficiency was observed from ammonia with a removal efficiency of 62.2% . The treatment system also achieved high removal efficiencies for some other parameters such as Turbidity, Color, TSS, COD, BOD, and TOC ranging from 85.5% to 89.2% after 60 min of the contact time.

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A systematic diagnosis of state of the art in the use of electrocoagulation as a sustainable technology for pollutant treatment: An updated review

Cited by 40 publications

References 247 publications

Optimization of the Electrocoagulation Process with Aluminum Electrodes for Rainwater Treatment

Optimization of the Electrocoagulation Process with Aluminum Electrodes for Rainwater Treatment

Performance of electrocoagulation process for copper removal in simulated artisanal and small-scale mining wastewater

Treatment of livestock slaughterhouse wastewater by the electrochemical method using stainless steel and copper electrodes

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