Electrocoagulation: Fundamentals and Prospectives

Barrera-Díaz, Carlos; Balderas‐Hernández, Patricia; Bilyeu, Bryan

doi:10.1016/b978-0-12-813160-2.00003-1

Cited by 45 publications

(27 citation statements)

References 35 publications

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“…The clear exemption of statistically insignificant terms in the model was through the forward screening method under the condition (p-value ≤ α = 0.05). The ANOVA in Table 5 revealed that the first order (X 1 , X 2 , X 4 ), two way interaction (X 1 X 2 and X 1 X 4 ) and pure quadratic effect (X 2 1 , X 2 2 and X 2 4 ) were highly significant for Al 3+ transport. More so, the F-value of 50.18 implied the model term was statistically significant and there was only a 0.01% chance that the large F-value could be due to noise.…”

Section: Analysis Of Variance (Anova)mentioning

confidence: 99%

“…The process requires dosing coagulants to coalesce impurities into large masses for subsequent removal by other treatment processes. Common coagulants such as aluminium sulphate, aluminium chloride, poly aluminium chloride, sodium aluminate, ferric chloride and ferric sulphate are used to achieve this physicochemical process in water treatment [2,3].…”

Section: Introductionmentioning

confidence: 99%

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Ion Exchange Dialysis for Aluminium Transport through a Face-Centred Central Composite Design Approach

et al. 2020

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An ion exchange dialysis (IED) is used in the recovery of aluminium from residue. In this paper, the face-centred central composite design (FC-CCD) of the response surface methodology (RSM) and desirability approach is used for experimental design, modelling and process optimization of a counter flow IED system. The feed concentration, feed flowrate, sweep flowrate and sweep concentration were selected as the process variables, with the Al transport across a Nafion 117 membrane as the target response. A total of 30 experimental runs were conducted with six centre points. The response obtained was analysed by analysis of variance (ANOVA) and fitted to a second-order polynomial model using multiple regression analysis. The actual R2 and standard deviation of the model are 0.9548 and 0.2932, respectively. Depending on the time zone of reference (24 h or 32 h), the highest enrichment of >1.50 was achieved. The designed variables were numerically optimized by applying the desirability function to achieve the maximum Al transport. The optimised condition values were found to be a feed concentration of 1600 ppm, feed flowrate of 61.76%, sweep flowrate of 37.50% and sweep concentration of 0.75 N for the 80% target response at 32 h. Overall, the model can be used to effectively predict Al recovery using the designed system.

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Section: Analysis Of Variance (Anova)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ion Exchange Dialysis for Aluminium Transport through a Face-Centred Central Composite Design Approach

et al. 2020

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“…An important factor in the Electrocoagulation and electrooxidation process is the use of electrodes. Aluminum electrodes during the reaction process produce three reaction zones, the first zone produces Al 3+ ions at pH 1-3.5, other zones produce hydro complexes such as Al (OH)3, and Al (OH) 4at pH 4-10 [10]. The Aluminum electrode increase of 31.67% COD content and decreases energy 48.03% when compared to Fe electrodes [11].…”

Section: Introductionmentioning

confidence: 98%

Personal Care Wastewater Treatment With Electro-coagulation and Electro-oxidation

Ardhianto

Bagastyo

2019

E3S Web Conf.

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Personal care wastewater contains pharmaceuticals and personal care products (PPCPs). The compounds were in organic pollutants which have to be treated before water can be discharged. Electrochemical processes such as electro-coagulation and electro-oxidation were used to remove non-biodegradable in wastewater. Electro-coagulation as pretreatment using aluminum electrodes as anode and cathode. Electro-oxidation using Ti/Pt, and Ti/IrO2 as anode electrodes and variation of current 0,6 A, 0,7 A, 0,8 A and 1,0 A. Aluminum electrodes has effectiveness in removing COD, and TSS in electrocoagulation. Using aluminum electrodes remove COD, and TSS 76.1% (5.41 g) and 90.3% (6.10 g). Under initial pH, aluminum electrode does not cause a change in pH from initial pH (4.8-4.9). The removal efficiency of electrooxidation process using aluminum electrocoagulation effluent COD using Ti/Pt and Ti/IrO2 were 34,30% (1,55 g) and 39,71% (1,80 g). Increasing current when using Ti/IrO2 causes the COD removal rate to be more effective than using Ti/Pt. removal COD with 1.0 A gave the optimum COD removal were 34,30% (2,3 Ah/L; 1,55 g) with Ti/Pt, and 39,71% (2,3 Ah/L; 1,80 g) with Ti/IrO2 compared to 0,6 A (1,4 Ah/L), 0,7 A (1,6 Ah/L), and 0.8 A (1,9 Ah/L).

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“…Either a voltage source (electrolysis cell) or an electrical load (galvanic element) is essential for the electrical circuit, which is closed through electrical wires [ 5 ]. There are many electrode materials used for EC treatment technologies including aluminum, graphite (Gr), and titanium (Ti), as well as iron in a plate or packed form of scraps such as steel turnings and millings [ 26 , 27 ]. Being electronically conductive, and then being able to interact with the molecule are among the basic features of electrode materials [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Performance of Graphite and Titanium as Cathode Electrode Materials on Poultry Slaughterhouse Wastewater Treatment

et al. 2020

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Despite the potential applicability of the combination between aluminium (anode) and graphite or titanium (cathode) for poultry slaughterhouse wastewater treatment, their technical and economic feasibilities have not been comprehensively captured. In this study, aluminium (anode) and graphite and titanium as cathode electrode materials were investigated and compared in terms of their performance on poultry slaughterhouse wastewater treatment. The wastewater samples collected from the Izhevsk Production Corporative (PC) poultry farm in Kazakhstan were treated using a lab-based electrochemical treatment plant and then analyzed after every 20 and 40 min of the treatment processes. Cost analysis for both electrode combinations was also performed. From the analysis results, the aluminium–graphite electrode combination achieved high removal efficiency from turbidity, color, nitrite, phosphates, and chemical oxygen demand, with removal efficiency ranging from 72% to 98% after 20 min, as well as 88% to 100% after 40 min. A similar phenomenon was also observed from the aluminium–titanium electrode combination, with high removal efficiency achieved from turbidity, color, total suspended solids, nitrite, phosphates, and chemical oxygen demand, ranging from 81% to 100% after 20 min as well as from 91% to 100% after 40 min. This means the treatment performances for both aluminium–graphite and aluminium–titanium electrode combinations were highly affected by the contact time. The general performance in terms of removal efficiency indicates that the aluminium–titanium electrode combination outperformed the aluminium–graphite electrode combination. However, the inert character of the graphite electrode led to a positive impact on the total operating cost. Therefore, the aluminium–graphite electrode combination was observed to be cheaper than the aluminium–titanium electrode combination in terms of the operating cost.

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Electrocoagulation: Fundamentals and Prospectives

Cited by 45 publications

References 35 publications

Ion Exchange Dialysis for Aluminium Transport through a Face-Centred Central Composite Design Approach

Ion Exchange Dialysis for Aluminium Transport through a Face-Centred Central Composite Design Approach

Personal Care Wastewater Treatment With Electro-coagulation and Electro-oxidation

Performance of Graphite and Titanium as Cathode Electrode Materials on Poultry Slaughterhouse Wastewater Treatment

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