Treatment of textile industry wastewater by electrocoagulation coupled with electrochemical advanced oxidation process

Zazou, Hicham; Afanga, Hanane; Akhouairi, Siham; Ouchtak, Hassan; Addi, Abdelaziz Aït; Akbour, Rachid Aı̈t; Assabbane, Ali; Douch, J.; Elmchaouri, Abdellah; Duplay, Joëlle; Jada, Amane; Hamdani, Mohamed

doi:10.1016/j.jwpe.2019.02.006

Cited by 156 publications

(47 citation statements)

References 48 publications

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“…A number of researchers used the EC process to treat different kind of dyes as Disperse Yellow 54 16 , Indigo Carmine 13 , Reactive Black 5 19 , Reactive Red 198 20 , and Methylene Blue 21,14 . Performances of treatment were also tested on real wastewater as reported by others [22][23][24][25][26] . Electrocoagulation method was adopted to treat pharmaceuticals effluents 27,28 , heavy metals like chromium 29 ,copper and nickel 30 , and nonmetallic inorganic species as phosphate 31 and sulfate 32 .…”

Section: This Process Happens As Followsmentioning

confidence: 99%

Batch elimination of cationic dye from aqueous solution by electrocoagulation process

et al. 2020

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Like other developing countries, Morocco has undergone a real industrial revolution that generates a huge amount of colored wastewater. Methylene blue (MB) could be considered as commonly model of cationic dyes that are widely used in industries. In the present work, the removal of MB was investigated in the presence of NaCl as electrolyte by electrocoagulation (EC) process. Parameters studied are the nature of electrodes, electrode spacing, initial dye concentration, agitation speed, applied current density, NaCl concentration, and the effect of the initial pH. Stainless steel electrodes have been used as cathode and anode in the electrochemical cell. The performance of the process was evaluated in terms of color removal, chemical oxygen demand (COD), total organic carbon (TOC), electrical power consumption, current efficiency, and the quantity of sludge formed. The results showed that the removal percent of 20 mg/L MB is 100 %, using stainless steel electrodes with an interspace of 1.5 cm and 20 mA/cm² for 6 min in the presence of 0.1 M NaCl at natural pH. COD and TOC removals within 15 min were 45% and 51% respectively. The power consumption, in that case, was 5.84 KWh/m3, while the amount of sludge formed was 1.64 Kg/m3.

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Section: This Process Happens As Followsmentioning

confidence: 99%

Batch elimination of cationic dye from aqueous solution by electrocoagulation process

et al. 2020

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“…In which, C is the TOC, COD or TSS value of treated aqueous solution (mg L − 1 ) and C 0 is the initial relating concentrations (mg L − 1 ). According to our previous study [21], treatment of textile wastewater by EC coupled with various EAOPs such as electrocoagulation-anodic oxidation (EC-AO), electrocoagulation-peroxicoagulation (EC-PC), EC-EF processes showed the effectiveness of sequential treatment of these processes than the individual process. Figure 3 shows the TOC removal and energy consumption obtained using EC and EC-EF for textile wastewater treatment.…”

Section: Integrated Ec-efmentioning

confidence: 95%

“…The electrochemical cell was operated with imposed current densities for both EC and EC-EF (20 and 10 mA cm − 2 , respectively) during 60 min of each treatment. These operating conditions (current densities and pH values and electrolysis time) were previously optimized and the operating conditions for other techniques are described, in our previous work [21]. In the case of EC, the collected samples were centrifuged at 6000 rpm for 10 min to settle the flocculated material.…”

Section: Experimental Apparatus and Operating Conditionsmentioning

confidence: 99%

Integrated electrochemical processes for textile industry wastewater treatment: system performances and sludge settling characteristics

Afanga

Zazou

Titchou

et al. 2020

Sustain Environ Res

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Textile wastewater containing toxic dyes needs efficient treatment before being released into the environment. Certain dyes are known or presumed to have carcinogenic potential for humans. In this work, hybrid electrochemical processes including electrocoagulation (EC) alone and combined with electro Fenton (EF), anodic oxidation (AO) and peroxicoagulation (PC) were tested to treat real textile wastewater using a batch reactor. A sequential EC and EF (EC-EF) process was found to be more effective. The experimental results indicated that the effectiveness of the treatment decreases in the following order: EC-EF > EC-AO > EC-PC > EC. EC-EF results showed a decrease in chemical oxygen demand (COD, 97%), total organic carbon (98%), total suspended solids (98%), and the concentration of metal species; showing that the treatment of such wastewater type can be achieved by combined EC-EF process in a one-pot bench-scale reactor. The electrical energy consumption, the iron dissolution, and the biological oxygen demand/COD ratios of EC and EC-EF processes were evaluated. Characterization of the sludge generated during EC treatment at current density of 20 mA cm − 2 was carried out. Precipitation, adsorption, and electrochemical oxidation/reduction of organic dyes and metallic ions occurred during the treatment. This investigation shows the efficiency of combined EC-EF to treat textile wastewater.

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“…This is evidenced by the growing number of researches devoted to this topic in the world. The mechanisms of photocatalysis involving metal oxides are presented in many studies [264][265][266][267][268][269][270][271][272][273]. At the same time, the prospects of using 1D nanostructures for photocatalytic processes, which have better transport characteristics than traditional nanoparticles, have recently been noted [274,275].…”

Section: Features Of the Use Of Metal Oxides Andmentioning

confidence: 99%

Metaloxide Nanomaterials and Nanocomposites of Ecological Purpose

Dontsova

Nahirniak

Астрелін

2019

Journal of Nanomaterials

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The features of the properties and creation of nanocomposite metal oxide materials, especially TiO2, ZnO, SnO2, ZrO2, and Fe3O4, and their applications for ecology are considered in the article. It is shown that nanomaterials based on them are very promising for use in the ecological direction, especially as sorbents, photocatalysts, and sensitive layers of gas sensors. The crystallochemical characteristics, surface structure, and surface phenomena that occur when they enter the water and air environment are given for these metal oxides, and it is shown that they play a significant role in obtaining the sorption and catalytic characteristics of these nanomaterials. Particular attention is paid to the dispersion and morphology of metal oxide particles by which their physical and chemical properties can be controlled. Synthesis methods of metal oxide nanomaterials and ways for creating of nanocomposites based on them are characterized, and it is noted that there are many methods for obtaining individual nanoparticles of metal oxides with certain properties. The main task is the correct selection and testing of parameters. The prospects for the production of metal oxide nanocomposites and their application for environmental applications are noted, which will lead to a fundamentally new class of materials and new environmental technologies with their participation.

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Treatment of textile industry wastewater by electrocoagulation coupled with electrochemical advanced oxidation process

Cited by 156 publications

References 48 publications

Batch elimination of cationic dye from aqueous solution by electrocoagulation process

Batch elimination of cationic dye from aqueous solution by electrocoagulation process

Integrated electrochemical processes for textile industry wastewater treatment: system performances and sludge settling characteristics

Metaloxide Nanomaterials and Nanocomposites of Ecological Purpose

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