Methods to improve electrochemical treatment effect of dye wastewater

Shen, Zhemin; Wu, Danhong; Yang, Ji; Yuan, Tao; Wang, W H; Jia, Jinping

doi:10.1016/j.jhazmat.2005.09.010

Cited by 94 publications

(51 citation statements)

References 24 publications

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“…In addition, applied current may be consumed by secondary reactions at very high cell voltages (16,31). In Figure 4, the optimum region lower than 10 kWh/kg dye decolorization and 95 kWh/kg COD removal energy consumption was determined at below 10.5 mA/cm 2 current density and between 10.1-14.6 g/L 75% NaCl + 25% Na2CO3 electrolyte mixture.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Energy Consumption in Electrochemical Oxidation of Acid Violet 7 Textile Dye using Pt/Ir Electrodes

Körbahti¹,

Turan²

2016

J. Turk. Chem. Soc., Sect. A: Chem.

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Abstract:The effects of processing parameters were investigated on the electrochemical oxidation of textile dyeing wastewater containing Acid Violet 7 (AV7) at Pt/Ir electrodes in the presence of 75% NaCl + 25% Na2CO3 (w/w) supporting electrolyte mixture in a batch electrochemical reactor. Experimental parameters were operated in the range of 300-1500 mg/L textile dye concentration, 4-20 g/L electrolyte concentration, 5-15 mA/cm 2 current density, and 20-60 °C reaction temperature. Energy consumption decreased with increasing textile dye concentration and electrolyte concentration, and decreasing the current density. In the study, energy consumption values were evaluated for textile dye decolorization (t=15 min) and chemical oxygen demand (COD) removal (t=120 min) as 2.7-23.3 kWh/kg dye decolorization and 50.9-317.9 kWh/kg COD removal, respectively.

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Section: Resultsmentioning

confidence: 99%

Evaluation of Energy Consumption in Electrochemical Oxidation of Acid Violet 7 Textile Dye using Pt/Ir Electrodes

Körbahti¹,

Turan²

2016

J. Turk. Chem. Soc., Sect. A: Chem.

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“…In according with the literature data [51][52][53][54][55][56] the presence of a catalyst in the electrical field can enhance the treatment efficiency with lower energy consumption. In order to improve the treatment performance of the 4-AP degradation and mineralization at lower current density (5 mAcm -2 ), the application of photocatalysis using TiO2-supported zeolite catalyst on the bulk electrolysis using BDD electrode was performed.…”

Section: Photocatalytically-assisted Electrochemical Oxidation Of 4-amentioning

confidence: 95%

Decontamination of Wastewaters Containing Organics by Electrochemical Methods

Manea¹,

Pop²

2013

Water Treatment

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Section: Introductionmentioning

confidence: 99%

“…Electrochemical treatment of wastewater is a relatively new type of wastewater treatment technology that is gradually developing into a promising technology [4][5]. Meanwhile, it has been successfully applied in the purification of wastewater from dye production [6] and from textile wastewater containing cyanides [7], phenols [8][9], and domestic sewage [10].Coking wastewater is generated from coal coking, coal gas purification, and by-product recovery processes of coking [11][12][13][14]. It contains complex inorganic and organic pollutants such as ammonium, sulfate, cyanide, thiocyanate, phenolic compounds, polynuclear aromatic hydrocarbons, and polycyclic nitrogen-containing acyclic compounds, Pol.…”

mentioning

confidence: 99%

Advanced Decomposition of Coking Wastewater in Relation to Total Organic Carbon Using an Electrochemical System

Wang¹,

Quan²,

An³

et al. 2017

Pol. J. Environ. Stud.

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IntroductionAs a new type of electrochemical processing, electrochemical technology has recently been paid more and more attention in the wastewater treatment field due to its advantages of larger specific surface area, better transfer effect, higher current efficiency, and space-time yield [1][2][3]. Electrochemical treatment of wastewater is a relatively new type of wastewater treatment technology that is gradually developing into a promising technology [4][5]. Meanwhile, it has been successfully applied in the purification of wastewater from dye production [6] and from textile wastewater containing cyanides [7], phenols [8][9], and domestic sewage [10].Coking wastewater is generated from coal coking, coal gas purification, and by-product recovery processes of coking [11][12][13][14]. It contains complex inorganic and organic pollutants such as ammonium, sulfate, cyanide, thiocyanate, phenolic compounds, polynuclear aromatic hydrocarbons, and polycyclic nitrogen-containing acyclic compounds, Pol. J. Environ. Stud. Vol. 26, No. 2 (2017) AbstractThis research included experiments on the advanced treatment of coking wastewater by electrochemical reactor. The results showed that a favorable operating condition could be obtained through the electrochemical course, when electrolysis time was 60 min, current density was 8 A, and electrode span was 1 cm. Under this condition, total organic carbon (TOC) removal efficiency could reach 73%, and the removal mechanism had also been analyzed. In addition, the electrodes' morphology characteristics and components were analyzed through a scanning electron microscope, and the results showed that on the surface of anode and cathode electrodes there were quite a few cracks, the amount of which increased after use. Meanwhile, the content of chemical elements on the electrodes' surface changed obviously after use -especially Ti content (from 39.66% to 92.69%) on the anode and Fe content (from 72.57% to 53.66%) on the cathode. The result was probably caused by the redox reaction, namely the shedding of the coating on the anode electrode's surface, and reactions around the cathode electrode's surface.

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Methods to improve electrochemical treatment effect of dye wastewater

Cited by 94 publications

References 24 publications

Evaluation of Energy Consumption in Electrochemical Oxidation of Acid Violet 7 Textile Dye using Pt/Ir Electrodes

Evaluation of Energy Consumption in Electrochemical Oxidation of Acid Violet 7 Textile Dye using Pt/Ir Electrodes

Decontamination of Wastewaters Containing Organics by Electrochemical Methods

Advanced Decomposition of Coking Wastewater in Relation to Total Organic Carbon Using an Electrochemical System

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