Intensification of a new electrocoagulation system characterized by minimum energy consumption and maximum removal efficiency of heavy metals from simulated wastewater

El-Ashtoukhy, E-S.Z.; Amin, N.K.; Fouad, Y.O.; Hamad, Hesham

doi:10.1016/j.cep.2020.108026

Cited by 56 publications

(29 citation statements)

References 66 publications

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“…The performance of the electrocoagulation system is influenced by the electrode material, particularly the anode, which determines the type of cations released into the solution. Because there was some disagreement over the anode's dissolving mechanism, it was necessary to investigate the effect of the anode material on the extent of electrocoagulation ( El-ashtoukhy et al., 2020 ). For different electrode materials, different reactions occur, and the properties of the metal hydroxides generated during the reactions are critical for the electrocoagulation process' efficiency ( Bener et al., 2019 ).…”

Section: Resultsmentioning

confidence: 99%

Studies on electrode combination for COD removal from domestic wastewater using electrocoagulation

Bote

2021

Heliyon

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Electrocoagulation is an electrochemical method that uses sacrificial electrodes to remediate wastewater. The combination of electrodes for the treatment of domestic wastewater is the factor that influences the removal efficiency of COD (Chemical Oxygen Demand) by using the electrocoagulation process. Aluminum and Iron electrodes are combined as anode-cathode and cathode-anode in Al–Al, Fe–Fe, Al–Fe, and Fe–Al. Different factors are considered to evaluate the removal efficiency of COD like; pH (3–9), reaction time (15–60 min), and current density (9.23–45 A/m 2 ). Based on this influencing factor Al–Al and Fe–Fe can remove COD up to 87.5 % and 90 % respectively. Similarly, 87.5 % and 88.89 % of COD were removed, when aluminum and iron were combined as Al–Fe and Fe–Al respectively. In addition, the effects of different operating parameters were discussed on the removal percentage of COD. This indicated that the combination of electrode influence the removal efficiency of COD using the electrocoagulation process under different operating parameters.

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Section: Resultsmentioning

confidence: 99%

Studies on electrode combination for COD removal from domestic wastewater using electrocoagulation

Bote

2021

Heliyon

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“…Through this removal mechanism, the % of Ni removal can still reach 100%. Under optimal conditions, the EC carried out on metal plating wastewater reached 100% of Ni removal in 20 minutes [7], simulated water reached 100% in 40 minutes [9], artificial metal plating wastewater was almost [20].…”

Section: Advances In Engineeringmentioning

confidence: 97%

“…Because the oxidation and reduction reactions that occurred in electrolytic cells are not spontaneous, electrical energy is needed from an external circuit using direct current. The chemical equations that describe reactions in Fe as an anode and Al as a cathode are detailed below [9]. At an anode oxidation reaction that can be occurred are Fe → Fe 2+ + 2 e ─ and Fe 2+ can be oxidized further to form Fe 3+ Fe 2+ → Fe 3+ + e ─ 2H2O → O2 + 4H + + 4e ─ At the cathode some reduction reaction can be arised, 2H2O + 2 e ─ → H2 + 2 OH ─ O2 + 4H + + 4e ─ → 2H2O…”

Section: Literature Reviewmentioning

confidence: 99%

Initial pH Influence on Organic Pollutants, Total Suspended Solids, and Nickel Removal from Citarum River Water Using Electrocoagulation

Widarti¹,

Raharjo²

2021

Proceedings of the 2nd International Seminar of Science and Applied Technology (ISSAT 2021)

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The water of the Citarum river in West Java is used as a water source for three hydropower plants, and some industries operate along the river area. Besides industries, the Citarum river also accommodates domestic and livestock waste. These lead to very high-level pollution in the Citarum river, especially organic and heavy metal waste. One method that can reduce simultaneously organic and heavy metals in water is electrocoagulation. The purpose of the research is to determine the influence of initial pH or pHi on the removal of total suspended solids, total organic pollutants, and nickel ion from Citarum water using aluminum as a cathode and an iron metal as an anode in the electrocoagulation method. During the electrocoagulation process, current density, electrode distance, stirring speed, DC supply voltage, and temperature were kept constant at 118 Am -2 , 2 cm, 100 rpm, 18.3 V, and 26-27 0 C respectively. The nickel-metal ion concentration is determined using Atomic Absorbance Spectrometry (AAS), total suspended solids as TDS by pH/EC/TDS/ 0 C meter, and organic pollutants as TOC by permanganometic titration. It is found that Ni removal is almost 100% after 10 minutes electrocoagulation process at pHi 3, 5 minutes at pHi 5 and 9, and 60 minutes at pHi 7.5. The Maximum total suspended solids, and total organic pollutants removal was obtained after 60 minutes electrocoagulation process. The finest total solid suspended and total organic pollutants removal achieved at pHi 3 are 40 and 84%, respectively. The kinetics of total organic pollutants and total suspended solids removal is suggested obeying the second-order and Lagergren's 2nd order equation, respectively. So, It suggests that the total suspended solids are removed from Citarum river water through an adsorption mechanism.

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“…Although adsorption–filtration is often the method of choice, chemical oxidation, membrane separation, liquid extraction, electrolytic treatment, electro-coagulation, electro-dialysis, electrochemical treatment, membrane technologies and adsorption onto activated carbons have also been used for many years to purify potable water. 43 The major problem using these methods are incomplete precipitation and the formation of large volumes of sludge that then are difficult to filter out for disposal. Another restriction to their widespread application is the high cost especially for activated carbons that themselves suffer from material losses during regeneration after use.…”

Section: Current Approaches To Eliminate Chemical Contaminantsmentioning

confidence: 99%

Nanocellulose: a bioadsorbent for chemical contaminant remediation

et al. 2021

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Intensification of a new electrocoagulation system characterized by minimum energy consumption and maximum removal efficiency of heavy metals from simulated wastewater

Cited by 56 publications

References 66 publications

Studies on electrode combination for COD removal from domestic wastewater using electrocoagulation

Studies on electrode combination for COD removal from domestic wastewater using electrocoagulation

Initial pH Influence on Organic Pollutants, Total Suspended Solids, and Nickel Removal from Citarum River Water Using Electrocoagulation

Nanocellulose: a bioadsorbent for chemical contaminant remediation

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