Electroflotation in Wastewater Treatment from Oil Products, Dyes, Surfactants, Ligands, and Biological Pollutants: A Review

Kolesnikov, V.; Ильин, В.И.; Колесников, А. В.

doi:10.1134/s0040579519010093

Cited by 31 publications

(16 citation statements)

References 43 publications

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“…In Figure 4 illustrates the effect of time on LAS removal efficiency at the best configuration found (Al, 1.5 cm, and 20 V). The results coincide with previous studies, in which at times between 15 and 30 minutes, electrocoagulation reaches maximum removal capacity [20,27]; however, in the present study, better removal efficiencies were obtained by increasing the operating time to 60 min.…”

Section: Effect Of Operating Timesupporting

confidence: 92%

“…and electrode separation (1.5 cm). It has been reported that electrochemical reactors with aluminum sacrificial electrodes give better results in the removal of hardness, sulfates, phosphates, as well as wastewater and industrial water with turbidity and organic substances; while the iron was more efficient in the removal of inorganic substances, such as heavy metals, colored silica, fats and oils [20].…”

Section: B Effect Of Electrode Material the Distance Between Electrodes And Voltagementioning

confidence: 99%

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Evaluation of Parameters in the Removal of Linear Alkylbenzene Sulfonate Anionic Surfactant Using Electrocoagulation

Villabona-Ortíz

De-La-Rosa-Jiménez

2020

Rev. Fac. Ing.

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The objective of the present investigation was to construct an electrocoagulation cell in a batch system and to evaluate its capacity to remove the anionic surfactant of the linear alkylbenzene sulfonate (LAS), which is present in gray water determining the effect of the type of electrodes (Al or Fe), distance between electrodes (1, 1.5 and 2 cm) and voltages (10, 15 and 20 V). The experimental tests were carried out for 20 min. The dimensions of the short wave electrolysis cell built in glass were 26 cm long, 7 cm wide and 12 cm high, with 10 electrodes of 12x6 cm supported by a PVC structure. The concentration of LAS in the solution was determined by employing UV-Vis spectrometry applying the Methylene Blue Active Substances (MBAS) method. A higher removal of 65.55% was obtained when aluminum electrodes were used, and 69.11% with iron electrodes a separation of 1.5 cm and a voltage of 20 V, presenting less change in pH, conductivity, and energy consumption when using the Al3 electrode. When evaluating the effect of time at the best experimental configuration (Al, 1.5 cm, 20 V) it was established that the removal efficiency increased to 75.13% in 60 min. Electrocoagulation with aluminum electrodes is presented as an efficient alternative for the removal of LAS in solution.

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Section: Effect Of Operating Timesupporting

confidence: 92%

Section: B Effect Of Electrode Material the Distance Between Electrodes And Voltagementioning

confidence: 99%

Evaluation of Parameters in the Removal of Linear Alkylbenzene Sulfonate Anionic Surfactant Using Electrocoagulation

Villabona-Ortíz

De-La-Rosa-Jiménez

2020

Rev. Fac. Ing.

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“…Such factors include pH of the medium, the type of electrolyte, salt composition, cations, anions, flocculants and surfactants. [21][22][23][24] The key steps towards an enhanced electroflotation process performance include the following: gas saturation control to ensure an efficient H 2 -, O 2 -to-particle contact; an increased particle size (flocculants, pH, coagulants); a changed ζ-potential (pH, surfactants, cations, anions); surface hydrophobization (anionic, cationic, nonionic surfactants).…”

Section: Resultsmentioning

confidence: 99%

“…To realize the above described techniques, the authors propose to use electroflotation units with the capacities of 1, 5 and 10 m 3 /h. More information on such units can be found in the following papers: [15,21]. These units are characterized with a low power consumption (0.3-0.5 kW•h/m 3 treated water), a short separation (extraction) time (not exceeding 10 minutes) and a recovery rate reaching 95-98%; the throughput is 5 m 3 of water per 1 m 3 of the unit; the cost of the unit per 10 m 3 /h does not exceed 1.5 million rubles.…”

Section: Resultsmentioning

confidence: 99%

Extraction by electroflotation of iron, chromium and aluminium hydroxides from aqueous solutions of sodium chlorides and sulphates in the presence of Mg2+, Cа2+ and surfactants of different types

Колесников¹,

So²,

Колесников³

et al. 2020

cisisr

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This paper examines an electroflotation process in which iron hydroxides are recovered from chloride-sulphate solutions in the presence of surfactants of different types, as well as calcium and magnesium cations used as reagents. It was found that calcium and magnesium cations lower the recovery of iron hydroxides by 30 to 40%. Introduction of surfactants intensifies the recovery of iron (III) hydroxides making it reach 89 to 98%. It was found that the anionic surfactant NaDDS produces a positive effect on the recovery of chromium (III) hydroxides by electroflotation by raising the recovery rate by 30 to 40% and expanding the effective pH range to 9. NaDDS improves the recovery of the mixture of iron, chromium and aluminium hydroxides in electrolytic solutions (10 g/l). Water treatment procedures are described aimed at removing iron (II, III) ions and the iron/chromium mixture. This research study was funded by D. Mendeleev University of Chemical Technology of Russia, Project no. З-2020-004.

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“…Numerous methods are currently being adopted such as adsorption [12], biodegradation [13,14], flocculation [15,16], oxidation process [17,18], ion exchange [19,20], nanofiltration/ultrafiltration [21][22][23][24], electrocoagulation [25,26], electrodialysis [27,28], electroflotation [29,30], ozonation [31,32], photochemical oxidation [33], reverse osmosis [34,35], etc., intended for the treatment of GV wastewater. While using these costly physical and chemical techniques, a massive amount of muck is generated; this leads to the second point of terrestrial contamination of our ecosystem.…”

Section: Introductionmentioning

confidence: 99%

Kinetic and Isothermal Investigations of Cost-Effective Sorptive Elimination of Gentian Violet Dye from Water Using Haplophragma adenophyllum Biowaste

Akram

Salman

Rehman

et al. 2021

Journal of Chemistry

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A novel biosorbent, Haplophragma adenophyllum (HAB) was employed to explore the biosorption mechanism of Gentian Violet (GV) dye. The novel sorbent was characterized by using FTIR spectra and physiochemical analysis. The effect of different optimizing factors like HAB dosage, GV initial concentration, contact time between sorbent and sorbate, pH of a solution, and the temperature was studied. The optimum removal of GV by HAB was observed at pH 6.0. The equilibrium study was carried out using Langmuir and Freundlich isotherms. Experimental data fitted well in Langmuir isotherm indicating monolayer isotherm with qmax value obtained at optimum process condition of 13.21 mg/g. Kinetics study was carried out and followed by pseudo-second-order model. Thermodynamics studies reveal the endothermic reaction.

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Electroflotation in Wastewater Treatment from Oil Products, Dyes, Surfactants, Ligands, and Biological Pollutants: A Review

Cited by 31 publications

References 43 publications

Evaluation of Parameters in the Removal of Linear Alkylbenzene Sulfonate Anionic Surfactant Using Electrocoagulation

Evaluation of Parameters in the Removal of Linear Alkylbenzene Sulfonate Anionic Surfactant Using Electrocoagulation

Extraction by electroflotation of iron, chromium and aluminium hydroxides from aqueous solutions of sodium chlorides and sulphates in the presence of Mg2+, Cа2+ and surfactants of different types

Kinetic and Isothermal Investigations of Cost-Effective Sorptive Elimination of Gentian Violet Dye from Water Using Haplophragma adenophyllum Biowaste

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