Treatment of orange II azo-dye by electrocoagulation (EC) technique in a continuous flow cell using sacrificial iron electrodes

Mollah, M. Yousuf A.

doi:10.1016/j.jhazmat.2004.03.011

Cited by 158 publications

(82 citation statements)

References 40 publications

(43 reference statements)

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“…Finally, these flocs are removed easily from aqueous IJHS 2014; 2(1): 17 medium by sedimentation or by flotation such as electrical potential, initial pH, dye induced by the H 2 bubbles generated at the concentration, electrode distance, electrical cathode (6,20), which is referred to as conductivity and reaction time on the electroflotation. The main purpose of this removal efficiency.…”

Section: Introductionmentioning

confidence: 99%

Textile Wastewater Treatment by Electrocoagulation Process using Aluminum Electrodes

Bazrafshan¹,

Mahvi

Zazouli

2014

Iran J Health Sci

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Background and purpose: Textile industries are among the most polluting industries regarding the volume and the complexity of treatment of its effluents discharge. This study investigated the efficiency of electrocoagulation process using aluminum electrodes in basic red 18 dye removal from aqueous solutions. Materials and Methods:This study was performed in a bipolar batch reactor with six aluminum electrodes connected in parallel. Several important parameters, such as initial pH of solution, initial dye concentration, applied voltage; conductivity and reaction time were studied in an attempt to achieve higher removal efficiency. Results:The electrochemical technique showed satisfactory dye removal efficiency and reliable performance in treating of basic red 18. The maximum efficiency of dye removal which was obtained in voltage of 50 V, reaction time of 60 min, initial concentration 50 mg/L, conductivity 3000 µS/cm and pH 7 was equal to 97.7%. Dye removal efficiency was increased accordance to increase of applied voltage and in contrast electrode and energy consumption was increased simultaneously. Conclusion:As a conclusion, the method was found to be highly efficient and relatively fast compared to conventional existing techniques for dye removal from aqueous solutions.

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Section: Introductionmentioning

confidence: 99%

Textile Wastewater Treatment by Electrocoagulation Process using Aluminum Electrodes

Bazrafshan¹,

Mahvi

Zazouli

2014

Iran J Health Sci

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“…So far, several biochemical, chemical and physical treatment methods were applied to treat textile wastewater, however, with limited success [1][2][3][4]. More recently, studies have focused on color and chemical oxygen demand (COD) removal from real combined textile wastewater and reactive dyebath effluent [5,6] as well as aqueous textile dyes [7][8][9][10] using electrocoagulation (EC). EC has successfully been employed for the treatment of strong effluents such as electroplating, laundry, slaughterhouse and chemical industry wastewater [11].…”

Section: Introductionmentioning

confidence: 99%

Effect of Operating Parameters on the Electrocoagulation of Simulated Acid Dyebath Effluent

Arslan-Alaton¹,

Kabdaşlı²,

Şahin³

2008

TOEBMJ

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Abstract:The present study investigates the influence of operating parameters (electrolyte concentration, applied electrical current, initial reaction pH) on color and COD removals from a simulated acid dyebath effluent employing electrocoagulation with aluminum (Al) and stainless steel (SS) electrodes. Our results indicated that almost complete (100% for EC with SS electrodes) color and partial (around 50% for EC with SS electrodes) COD removal could be achieved via electrocoagulation using Al as well as SS electrodes once working conditions were optimized. The study also revealed that electrocoagulation with SS electrodes was more attractive both in terms of treatment performance as well as electrical energy and sludge handling costs; the electrical energy requirement and sludge production rate were 17 kWh/(m 3 wastewater) and 8200 g/(m 3 wastewater) for electrocoagulation with Al electrodes, instead of 8 kWh/(m 3 wastewater) and 700 g/(m 3 wastewater) for electrocoagulation with SS electrodes to achieve the same treatment efficiency.

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“…, in the present case) is enhanced facilitating higher rate of flocculation and hence the color removal rate [20,21]. However, on further raising current density above its optimum value, the advantage of enhanced ion formation or flocculation rate is counterbalanced by lowering of diffusion rate of flocculants due to enhanced inter-particle collision/hindrance.…”

Section: +mentioning

confidence: 65%

Removal of Malachite Green from Contaminated Water using Electro-Coagulation Technique

Getaye¹,

Hagos²,

Alemu³

et al. 2017

JAPLR

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Electro-coagulation analytical technique has been used for the removal of malachite green -a dyestuff used as antimicrobial in aquaculture. Effects of parameters such as current density, pH, dye initial concentration, interelectrode separation and amount of electrolyte on the dye color-removal have been investigated using Al and Fe as scarifying anodes. It was observed that whereas increase in dye initial concentration or inter-electrode separation, the rate of color removal continuously falls, however, on raising of electrolyte concentration, color removal rate enhances up to a definite electrolyte level, beyond that there was no further improvement in the color removal. Further, for achieving maximum color removal of malachite green aqueous solution optimum current density (76.5A/m 2 ) and pH (8.0) of solution, is required. Complete color removal of 100mg/L malachite green aqueous solution could be achieved in 30min using electrolyte (NaCl) concentration 0.4g/L, inter-electrode distance: 1cm and optimum pH and current density. Performance of Al and Fe as sacrificial electrodes, in terms of their color removal efficiency, was almost similar except in their response to inter-electrode separation, as variable, where in case of Fe as anode, color removal rate declined more rapidly. The outcome of the present research work may be useful for an effective large scale treatment of industrial effluents contaminated with malachite green dye. Keywords:

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Treatment of orange II azo-dye by electrocoagulation (EC) technique in a continuous flow cell using sacrificial iron electrodes

Cited by 158 publications

References 40 publications

Textile Wastewater Treatment by Electrocoagulation Process using Aluminum Electrodes

Textile Wastewater Treatment by Electrocoagulation Process using Aluminum Electrodes

Effect of Operating Parameters on the Electrocoagulation of Simulated Acid Dyebath Effluent

Removal of Malachite Green from Contaminated Water using Electro-Coagulation Technique

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