Applicability and new trends of different electrode materials and its combinations in electro coagulation process: A brief review

Sivaranjani,; Gafoor, Abdul; Ali, Nasar; Kumar, Sandeep; Ramalakshmi,; Begum, Sabeena; Rahman, Zunaithur

doi:10.1016/j.matpr.2020.05.379

Cited by 25 publications

(6 citation statements)

References 49 publications

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“…As a result, electrodissolution of the working metal electrode, also defined as the sacrificial anode, occurs. In most of the EC processes, aluminum (Al) or iron (Fe) anodes are used, which favor the formation of hydroxi-metallic species as products of the electrochemical reactions, which are effective in terms of destabilizing the pollutant constituents of the effluents. , In addition to Al and Fe, other metals such as Cu, Ti-MnO 2 , Ni, Zn, and Mg are also used. − …”

Section: Electrocoagulation Process (Ec)mentioning

confidence: 99%

Electrocoagulation Process as a Consolidated Technology in the Treatment of Industrial Effluents and as a Promising Process in the Treatment of Effluents Generated by Car Washes: A Brief Review

Guerreiro Crizel,

Barreto,

Fiori

et al. 2024

ACS EST Water

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Electrocoagulation (EC) is an efficient treatment method that involves the electrodissolution of anodes, the formation of coagulants in situ, and the production of hydrogen at the cathode, facilitating the removal of pollutants by flotation. Industry in general aims to reduce the contaminant load, expressed as chemical oxygen demand (COD), and EC effluent treatment is particularly effective in this process. The development of EC processes has been an efficient alternative for the treatment of effluents with high pollutant loads, such as tannery, pulp and paper, textile, beverage, and food industries, and many demonstrate the potential for application in car wash effluent. This study presents a review of the use of EC for the treatment of various effluents containing COD, OGs, surfactants, color, and turbidity, but with a greater focus on the vehicle washing sector. It also discusses the factors that influence the efficiency of EC and the main discussions of the authors. Presently, the investigations of studies already carried out show that the performance of the EC process is dependent on many relationships and factors, such as the type of material constituting the electrode, the electric potential difference, the electric current density, the distance between electrodes, the surface area of the electrodes, the pH, the initial concentration of contaminants, the conductivity and the treatment time. The review demonstrated that the EC process has been employed in the treatment of many types of effluents and with relatively high efficiency rates, in general, between 60.0% and up to 90.0%, aiming at the reduction of the COD indexes, the reduction from 60.0% up to 99.0% of color content, the 87.0% reduction of chromium. In turn, for turbidity, it varied on average from 44.0 to 99.0%. For other parameters such as MBAS and OGs, in most studies, the reduction exceeded 90.0%.

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Section: Electrocoagulation Process (Ec)mentioning

confidence: 99%

Electrocoagulation Process as a Consolidated Technology in the Treatment of Industrial Effluents and as a Promising Process in the Treatment of Effluents Generated by Car Washes: A Brief Review

Guerreiro Crizel,

Barreto,

Fiori

et al. 2024

ACS EST Water

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“…Wastewater treatment technologies are not a single technology but a combination of technologies. The conventional treatment technologies for pulp and paper wastewater include electrolysis (Mwangi et al 2021;Sivaranjani et al 2021), adsorption, membrane separation (Poojamnong et al 2020), biological treatment technologies (Sharma et al 2021), advanced oxidation technologies (Pierpaoli et al 2021;Ribeiro et al 2020;Palmas 2021), etc. However, there still exists a high energy consumption issue (Chen et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Impact of continuous electrochemical degradation of eucalyptus alkaline peroxide mechanical pulping wastewater

2022

BioRes

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Levels of pollutants in pulp and papermaking wastewater are an important issue for environmental protection. High concentrations of contaminants can seriously affect the environment if they are not processed. Therefore, treating paper wastewater is a necessary option for governments to select appropriate treatment methods to remove the multi-component pollutants. In this study, the impact of continuous electro-degradation of eucalyptus alkaline peroxide mechanical pulping wastewater was studied. An electrolytic treatment method performed at a low voltage was used. Through the electrolysis method, the wastewater chemical oxygen demand was decreased by 98%, and color-generating groups were nearly all destroyed. During the electrolysis process, the pH value of wastewater continuously decreased and finally reached 2.5. Lowering the pH of the waste solution will help increase the electrolysis efficiency of the wastewater. A total of 5.8 g of alkali was obtained. The wastewater precipitation before and after electrolysis was analyzed by X-ray photoelectron, Fourier transform infrared, and energy-dispersive X-ray spectroscopies.

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“…It consists of an electrode arrangement in contact with the target wastewater. The electric current passes through electrodes and causes the dissolution of the metal ions from the anode and hydroxyl ions from the cathode (Hakizimana et al, 2017;Mollah et al, 2004a;Mousazadeh et al, 2021;Sivaranjani et al, 2021). These metals ions generated in-situ cause the formation of the floc by combining with hydroxyl ions within the wastewater (An et al, 2017;Garcia-Segura et al, 2017;Ghernaout et al, 2012;Hakizimana et al, 2017;Kabdaşlı et al, 2012;Mollah et al, 2004a).…”

Section: Introductionmentioning

confidence: 99%

“…These metals ions generated in-situ cause the formation of the floc by combining with hydroxyl ions within the wastewater (An et al, 2017;Garcia-Segura et al, 2017;Ghernaout et al, 2012;Hakizimana et al, 2017;Kabdaşlı et al, 2012;Mollah et al, 2004a). The complete process of treatment consists of three major steps, i.e., the generation of ions at anode and cathode due to electrolytic reaction, formation of coagulants in the wastewater, and lastly, the removal of the pollutant by adsorption that gets settles down or floats to form the scum layer (Garcia-Segura et al, 2017;Hakizimana et al, 2017;Islam, 2019;Mollah et al, 2004;Sahu et al, 2014;Kumar et al, 2021). In EC, multiple factors affect the process, such as current density (CD), pH, electrode arrangement, conductivity, reactor design, electrode arrangement, and concentration of other ions.…”

Section: Introductionmentioning

confidence: 99%

Evaluation and optimization of electrocoagulation process parameters for the treatment of oil drill site wastewater

Kumar

Nawaz

Singh

2022

Preprint

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The effluent from the oil drilling site is a complex mixture of harmful chemicals that causes environmental impacts on its disposal. The treatment of oil drilling site wastewater has not been explored in-depth in the available literature and requires understanding about its characteristics and optimization of the treatment process. In the present study, we have optimized the electrocoagulation process with aluminum electrodes for the drill site wastewater treatment. A multi-level factorial center composite design using response surface methodology (RSM) is applied to quantify the individual and combined effect of the current density, pH and inter-electrode distance (IED) on the COD removal from the drill site wastewater and the energy consumption of the electrocoagulation process. The increasing current density shows significant increase in COD removal. A similar trend was observed with decrease in pH on COD removal. The model obtained from RSM study predicted the optimum current density, pH, and IED within the experimental range of the study. It was found that the optimum condition for DSW-1 samples for 78% COD removal is at 4.76 mA/cm2 and 4 pH, and for DSW-2, we get the COD removal of 64% at 19.04 mA/cm2 and 1.2 cm IED. The study shows that the current density is the dominant factor for the process's energy consumption and operating cost as compared to the pH and IED. The study demonstrated optimization of the electrocoagulation process in drill site wastewater treatment and could be effectively used for large-scale treatment through the electrocoagulation process.

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Applicability and new trends of different electrode materials and its combinations in electro coagulation process: A brief review

Cited by 25 publications

References 49 publications

Electrocoagulation Process as a Consolidated Technology in the Treatment of Industrial Effluents and as a Promising Process in the Treatment of Effluents Generated by Car Washes: A Brief Review

Electrocoagulation Process as a Consolidated Technology in the Treatment of Industrial Effluents and as a Promising Process in the Treatment of Effluents Generated by Car Washes: A Brief Review

Impact of continuous electrochemical degradation of eucalyptus alkaline peroxide mechanical pulping wastewater

Evaluation and optimization of electrocoagulation process parameters for the treatment of oil drill site wastewater

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