A novel single continuous electrocoagulation process for treatment of licorice processing wastewater: Optimization of operating factors using RSM

Abbasi, Shahryar; Mirghorayshi, M.; Zinadini, Sirus; Zinatizadeh, A. A.

doi:10.1016/j.psep.2019.12.005

Cited by 101 publications

(27 citation statements)

References 54 publications

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“…The electrolytic concentration of wastewater in an electrochemical process has a significant impact on the removal efficiency of pollutant for the wastewater treatment process [ 56 ]. When it comes to treating strong wastewater, using a highly conducting solution with a supporting electrolyte has several advantages such as avoiding migration effects, increasing solution conductivity, lowering electrode resistance, lowering energy consumption, and increasing process efficiency [ 57 ]. The electrolytic concentration it has a considerable impact on the kinetic electro-dissolution of the sacrificial anodes, as well as the protective layer of the double coagulant and the flocs' shape [ 57 ].…”

Section: Resultsmentioning

confidence: 99%

“…When it comes to treating strong wastewater, using a highly conducting solution with a supporting electrolyte has several advantages such as avoiding migration effects, increasing solution conductivity, lowering electrode resistance, lowering energy consumption, and increasing process efficiency [ 57 ]. The electrolytic concentration it has a considerable impact on the kinetic electro-dissolution of the sacrificial anodes, as well as the protective layer of the double coagulant and the flocs' shape [ 57 ]. Table 4 shows that, there is an increment of removal efficiency of color, COD and turbidity from wastewater whereas the electrolytic concentration was increased.…”

Section: Resultsmentioning

confidence: 99%

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Development of electrocoagulation process for wastewater treatment: optimization by response surface methodology

Bote

Asaithambi

Alemayehu

2022

Heliyon

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Development of electrocoagulation process for wastewater treatment: optimization by response surface methodology

Bote

Asaithambi

Alemayehu

2022

Heliyon

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“…It is observed in studies that the pollutant removal increases as the current density increases [43][44][45][46]. The mechanism of electrocoagulation is shown in Figure 1 below.…”

Section: Electrocoagulationmentioning

confidence: 95%

Removal of Reactive Black 5 from Polluted Solutions by Electrocoagulation: Modelling Experimental Data Using Artificial Neural Networks

Oyar

Eren

Özdemir

2020

Sakarya University Journal of Science

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The wide range of today's industry increases the diversity of pollutants in the wastewater characteristics. In particular, the wastewater of the textile industry is highly colored. Different techniques are used for color removal of dyes from wastewater. In this work, the removal efficiency of the textile dye (Reactive Black 5) at different current densities (48.5 A/m 2 , 97.18 A/m 2 , 194.36 A/m 2 , 291.5 A/m 2 , 388.7 A/m 2) was investigated by electrocoagulation method. The dye concentration of wastewater prepared in the laboratory scale was adjusted to 100 mg/L. Two iron electrodes and 3 g NaCl were used in the electrocoagulation system. The samples which taken periodically were measured after the centrifugal processes with the UV spectrophotometer. The experimental results were also modelled with artificial neural networks (ANNs). As a result of the experiments, approximately 90-100% color removal efficiency was obtained. According to the modelling study, the ANNs can predict the color removal efficiency with coefficient of determination (R 2) between the experimental and predicted output variable reached up to 0.99.

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“…The plates were fully submerged into the solution in the reactor during all experiments, and were cleaned manually before each run by abrasion with sand paper and treatment with 15% hydrochloric acid, followed by washing with distilled water [27]. Based upon the important influence parameters mentioned earlier [31][32][33], the current intensity in the range between 0.4 and 0.8 A, pH between 3.0 and 9.0, and three electrolytes of Na 2 SO 4 , Na 2 CO 3 , and NaCl with 2 g L −1 was selected for the optimal single-factor impact experimental design. In addition, the initial concentrations of both MO and AY in the simulated aqueous solution were set to 100 mg L −1 , the gap between two electrodes was fixed at 2 cm, stirring speed was 1000 r min −1 , and the reversing time was 10 s. An amount of 2 mL of simulated aqueous solution was sampled with an interval of 10 min and then filtered with 0.22 mm membrane (glass fiber filter) for the additional analysis of MO and AY concentration.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

Degradation of Azo Dyes with Different Functional Groups in Simulated Wastewater by Electrocoagulation

Liu

Bao

et al. 2022

Water

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Increasing attention has been paid to the widespread contamination of azo dyes in water bodies globally. These chemicals can present high toxicity, possibly causing severe irritation of the respiratory tract and even carcinogenic effects. The present study focuses on the periodically reverse electrocoagulation (PREC) treatment of two typical azo dyes with different functional groups, involving methyl orange (MO) and alizarin yellow (AY), using Fe-Fe electrodes. Based upon the comparative analysis of three main parameters, including current intensity, pH, and electrolyte, the optimal color removal rates for MO and AY could be achieved at a rate of up to 98.7% and 98.6%, respectively, when the current intensity is set to 0.6 A, the pH is set at 6.0, and the electrolyte is selected as NaCl. An accurate predicted method of response surface methodology (RSM) was established to optimize the PREC process involving the three parameters above. The reaction time was the main influence for both azo dyes, while the condition of PREC treatment for AY simulated wastewater was time-saving and energy conserving. According to the further UV–Vis spectrophotometry analysis throughout the procedure of the PREC process, the removal efficiency for AY was better than that of MO, potentially because hydroxyl groups might donate electrons to iron flocs or electrolyze out hydroxyl free radicals. The present study revealed that the functional groups might pose a vital influence on the removal efficiencies of the PREC treatment for those two azo dyes.

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A novel single continuous electrocoagulation process for treatment of licorice processing wastewater: Optimization of operating factors using RSM

Cited by 101 publications

References 54 publications

Development of electrocoagulation process for wastewater treatment: optimization by response surface methodology

Development of electrocoagulation process for wastewater treatment: optimization by response surface methodology

Removal of Reactive Black 5 from Polluted Solutions by Electrocoagulation: Modelling Experimental Data Using Artificial Neural Networks

Degradation of Azo Dyes with Different Functional Groups in Simulated Wastewater by Electrocoagulation

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