Treatment of textile wastewaters by electrocoagulation employing Fe-Al composite electrode

Verma, Akshaya Kumar

doi:10.1016/j.jwpe.2017.11.001

Cited by 127 publications

(45 citation statements)

References 26 publications

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“…EC has been successfully used for the removal of oil and grease from biodiesel wastewater, with a removal efficiency as high as 98.42% . Similar successful results were obtained from treatment of antibiotics, textile wastewater phosphate from surface water, lead, landfill leachate, phenolic compounds, and heavy metals …”

Section: Introductionsupporting

confidence: 52%

“…[25][26][27] EC has been successfully used for the removal of oil and grease from biodiesel wastewater, with a removal efficiency as high as 98.42%. [28] Similar successful results were obtained from treatment of antibiotics, [19] textile wastewater [29] phosphate from surface water, [30] lead, [31] landfill leachate, [32] phenolic compounds, [21] and heavy metals. [33,34] Although, there are some studies regarding the removal of boron by electrocoagulation process, [10,[35][36][37] its lack of full scale optimization on boron removal in low concentration by electrocoagulation process, especially electrode optimization which causes that makes difference on results and also lack of operating cost calculation.…”

Section: Introductionmentioning

confidence: 57%

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Operating Cost and Treatment of Boron from Aqueous Solutions by Electrocoagulation in Low Concentration

Deniz

Akarsu

2018

Global Challenges

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The objective of this study is to determine the optimum parameters of electrocoagulation process in treatment of boron in low concentrations. Especially, studies on electrode optimization in low boron concentrated waters are insufficient. Therefore, the effect of electrode combination (Al–Al, Al–Fe, Al–SS, Fe–Al, Fe–Fe, and Fe–SS), pH (5–9), current density (8–24 mA cm −2 ), distance (1–3 cm), and electrolysis time (10–90 min) on treatment of boron containing wastewater is studied to obtain maximum removal efficiency. The maximum removal efficiency of boron is obtained as 95.6%. Operation conditions for maximum removal are the electrode combination of Fe–Al, current density of 16 mA cm −2 , pH 7.0, concentration of 30 mg L −1 and the reaction time of 70 min. Operating cost of the electrocoagulation process is calculated as 2.35 $ m −3 . This study indicates that the electrocoagulation process can be successfully applied in order to treat boron‐polluted wastewaters at low initial concentrations.

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Section: Introductionsupporting

confidence: 52%

Section: Introductionmentioning

confidence: 57%

Operating Cost and Treatment of Boron from Aqueous Solutions by Electrocoagulation in Low Concentration

Deniz

Akarsu

2018

Global Challenges

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“…Congo red is water-soluble, yielding a red colloidal solution; its solubility is greater in organic solvents. 11 Used mostly in leather, paper and textile industry.…”

Section: Fig No 2 Chemical Representation Of Methylene Bluementioning

confidence: 99%

Coagulation and Electrocoagulation Process for Dye Removal fromTextile Wastewater: A Review

Singh

Ransingh

2020

RJET

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Dye components like azo dye, Congo red dye, methylene blue is common in the textile wastewater and challenges often arises as soluble dyes are the most problematic for removal. Conventional coagulation and Electrocoagulation often provide suitable outcome while treating these dye wastewaters. Coagulation process is a conventional treatment process where chemicals for binding the dye colloids are applied for floc formation and removed the pollutant following settling. In electrocoagulation, electrode of required metals ion is provided to generate current density instead chemical salt resulting in low amount of sludge generation. Mostly, Aluminum salt and iron salt is used as coagulant and similarly, electrode made of Al and Fe is used as anode for electrocoagulation process. In present study, articles are reviewed to have clear idea on the basis of initial pH (6-8), electrolysis time (2-30min), initial dye concentration (50 to 400mg/L), current density (5, 10,15 mA/cm 2), temperature and mixing speed etc along with electrolyte concentration and type (NaCl, HCL, H2SO4). The review from various articles suggested that final outcome of electrocoagulation process in dye removal is more effective as compared to the conventional coagulation.

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“…Since these COD removal efficiencies meet the limit values specified in the regulation for discharge of wastewater, the selected 8V potential is proper. The color removal at the rate of 100% and COD removal at the rate of 90% were achieved in the study of Verma (2017) [2] on Fe/Al electrode couple in synthetic textile wastewater that was conducted at 12 V under optimized conditions (pH 8, reaction time 80 min, interelectrode distance 3 cm). The color removal at the rate of 98% and COD removal at the rate of 87% was obtained in the study of Ghanbari et al, (2014) [30] on textile wastewater by using Fe and Al anode and under optimum operating conditions (pH 7, current 300 mA, distance between two electrodes 3 cm and reaction time 40 min).…”

Section: The Effect Of Electrode Couple and Cell Potential On Electromentioning

confidence: 99%

Investigation of Electrocoagulation and Electrooxidation Methods of Real Textile Wastewater Treatment

Delil¹,

Gören²

2019

Anadolu University Journal of Science and Technology-a Applied Sciences and Engineering

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In this study, it was investigated the treatability of real wastewater from textile industry by electrochemical treatment methods (electrocoagulation and electrooxidation). Effect of important operating parameters such as, electrode type and combination (Al-Al, Fe-Fe, Al-Fe, Fe-Al, Pt-Fe), pH, reaction time and potential were investigated on removal efficiency of color and chemical oxygen demand (COD). The initial color and COD concentrations of the wastewater were 395 Pt-Co and 1040 mg/L, respectively. At the end of the electrocoagulation experiments, concentrations of color and COD were decreased to 28 Pt-Co and 115 mg/L, respectively. Results showed that at pH 3 and 6 V potential, up to 93% color and 89% COD removal efficiencies were obtained in the reactor consisting of Fe-Fe electrodes. COD and color were removed at the rate of 88% and 92%, respectively in the study done with Al-Al couple at 10 V in natural pH (6.96). COD removal was achieved in the ratio of 93% at 6V as a result of the electrooxidation study with a couple of Pt-Fe electrodes. The study showed that the removal process was promising and it was reached to the discharge limit values for the color and COD with each electrode couple specified in the regulation. When considering the removal efficiencies, electrocoagulation process is the best treatment method is for this study. In terms of energy consumption, the electrooxidation process is more economical to effectively remove COD

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Treatment of textile wastewaters by electrocoagulation employing Fe-Al composite electrode

Cited by 127 publications

References 26 publications

Operating Cost and Treatment of Boron from Aqueous Solutions by Electrocoagulation in Low Concentration

Operating Cost and Treatment of Boron from Aqueous Solutions by Electrocoagulation in Low Concentration

Coagulation and Electrocoagulation Process for Dye Removal fromTextile Wastewater: A Review

Investigation of Electrocoagulation and Electrooxidation Methods of Real Textile Wastewater Treatment

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