Removal of Acid Brown 14 in aqueous media by electrocoagulation: Optimization parameters and minimizing of energy consumption

Parsa, Jalal Basiri; Rezaei-Vahidian, Hadi; Soleymani, Ali Reza; Abbasi, Mahmoud

doi:10.1016/j.desal.2011.05.040

Cited by 83 publications

(40 citation statements)

References 13 publications

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“…In all electrochemical processes, current density (CD) is the primary parameter controlling the reaction rate [22]. According to Faraday's law, intensifying the applied current increases the production of metal ions on a sacrificial anode surface [22].…”

Section: Effect Of Current Densitymentioning

confidence: 99%

A comparative study on the removal of phenol from aqueous solutions by electro–Fenton and electro–persulfate processes using iron electrodes

et al. 2015

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This study examined the removal of phenol from aqueous solutions through electro-Fenton and electro-persulfate processes using iron electrodes. The effect of operational parameters such as initial pH, current density, initial concentration of phenol, hydrogen peroxide dose, and persulfate (PS) concentration on the removal of phenol were investigated. The results showed that the efficiency of phenol removal was directly related to the initial concentrations of hydrogen peroxide and PS, and was inversely correlated with a highly alkaline pH and elevated concentration of phenol. The efficiency of phenol removal was significantly increased by increasing PS and H 2 O 2 concentrations from 0.1 to 0.4 mM, but there was little influence on removal efficiency with greater quantities of PS and H 2 O 2 . Ultimately, phenol was almost completely removed after 45 min in both processes.

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Section: Effect Of Current Densitymentioning

confidence: 99%

A comparative study on the removal of phenol from aqueous solutions by electro–Fenton and electro–persulfate processes using iron electrodes

et al. 2015

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“…2 Effect of initial pH on decolorization (electrical current=200 mA, distance between anodes: 2 cm, combined Fe-Al as anode) electrocoagulation processes which must be minimized through pH adjustment. Based on the correlation between coagulants (Fe 3+ and Al 3+ ) and initial pH of the matrix, aluminum and iron exhibit their minimum solubility within pH values of 6 and 8, respectively (Parsa et al 2011;Ghernaout et al 2011). When iron and aluminum were used simultaneously as the anode, the most favorable flocculation occurred at pH 7 which corresponds to the minimum solubility of the coagulants produced during their anodic dissolution.…”

Section: Effect Of Initial Phmentioning

confidence: 99%

Electrocoagulation/Flotation of Textile Wastewater with Simultaneous Application of Aluminum and Iron as Anode

et al. 2014

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Wastewater discharged from textile industry contains a variety of polluting substances including dyes. Amongst treatment processes, electrocoagulation/flotation is a promising method for color removal from textile wastewater. In this study, the performance of a new electrocoagulation/flotation with combined Fe-Al anodes and a copper made cell as cathode was investigated for the treatment of real textile wastewater. The optimal operational condition for decolorization was pH=7, 300 mA electrical current, 3 cm distance between the two anodes and 40 min reaction time using iron and aluminum as anode materials simultaneously. Under this condition, 98 % color (ADMI) removal was achieved. Furthermore, 87 % COD removal was obtained in similar optimal condition except in 400 mA. To investigate electrical current dependency on the COD removal rate, a kinetic study was carried out and data were in good agreement with the first order kinetic model. The rate constants (k) of COD removal were 0.0234, 0.0291, 0.0393 and 0.0519 min −1 for 100, 200, 300 and 400 mA, respectively.

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“…This insulating layer would sharply increase the ohmic resistance of the electrochemical cell and result in a significant reduction in the current efficiency and treatment conversion. Hence, it is suggested that among the present anions, there should be 20 % Cl -to ensure a normal operation of EC in water treatment (Parsa et al 2011).…”

Section: Effect Of Supporting Electrolyte On Electrocoagulationmentioning

confidence: 99%

Electrocoagulation for COD and diesel removal from oily wastewater

Safari

Aghdam

Kariminia

2015

Int. J. Environ. Sci. Technol.

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This study investigated the diesel and COD removal from oily wastewater by electrocoagulation. Experiments were conducted in a 2-l reactor using aluminum and iron electrodes. Effects of different parameters including pH (3-11), time (10-60 min), voltage (4.5-10.5 V), supporting electrolyte (NaCl concentration), electrode material and initial diesel concentration (3500-11,000 mg/L) were studied in order to evaluate the efficiency of electrocoagulation. Furthermore, the consumption of energy and the amount of sludge produced by this method were evaluated. The highest removal efficiency (COD removal of 99.1 ± 0.2 % and diesel removal of 98.8 ± 0.2 %) was observed under the following conditions: pH 7, 40 min, 10.5 V, NaCl concentration of 0.5 g/ L, diesel concentration of 3500 mg/L. The consumption of energy was estimated to be 6.47 kWh/m 3 , and the amount of sludge generated was 1995 mg/L. The results demonstrated that the electrocoagulation is a feasible technique for treatment of heavily contaminated petroleum refinery wastewater.

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Removal of Acid Brown 14 in aqueous media by electrocoagulation: Optimization parameters and minimizing of energy consumption

Cited by 83 publications

References 13 publications

A comparative study on the removal of phenol from aqueous solutions by electro–Fenton and electro–persulfate processes using iron electrodes

A comparative study on the removal of phenol from aqueous solutions by electro–Fenton and electro–persulfate processes using iron electrodes

Electrocoagulation/Flotation of Textile Wastewater with Simultaneous Application of Aluminum and Iron as Anode

Electrocoagulation for COD and diesel removal from oily wastewater

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