Treatment of textile industry effluents by Electro-Coagulation and Electro-Fenton processes using solar energy: A comparative study

Louhichi, Boulbaba; Gaied, Faiçal; Mansouri, Khaled; Jeday, Mohamed Razak

doi:10.1016/j.cej.2021.131735

Cited by 40 publications

(13 citation statements)

References 45 publications

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“…Oil removal of 88 % was reached using the BRT operating parameters of 3 min, 2.14 A/ dm 2 CD, 3 g/L SC, and 1.9 min SOT at the lowest operating cost of 0.65 US$/kg COD. Similar conclusions have been provided by [16,[36][37][38][39][40], and other previous works are briefly listed in Table 1.…”

Section: Ect Systemsupporting

confidence: 88%

“…This combination of EC and other treatment technologies assists the treatment process of different types wastewater containing COD. The same conclusions were provided by [29,37,[49][50][51][52][53], where EC is combined with anodic oxidation, electrooxidation, electro-Fenton, flotation, electrooxidation, ozonation, and peroxone, respectively, to eliminate organic and inorganic pollutants from wastewater.…”

Section: Ect In Hybrid Systemssupporting

confidence: 55%

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Treatment of oily wastewater by electrocoagulation technology: A general review (2018-2022)

Jasim¹,

AlJaberi²

2022

J. Electrochem. Sci. Eng.

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A huge amount of oily wastewater is discharged annually from several industries like petroleum and petrochemical factories. Scientists and researchers are permanently concentrated on creating conventional technologies or identifying novel treatment options for oily wastewaters, since they need to be treated before being discharged into the soil and aquatic ecosystems. Electrocoagulation technology (ECT) is an electrochemical method employed to remove numerous pollutants from domestic and industrial wastewaters. This paper aims to review the recently published articles from 2018 to 2022 concerned with ECT for oily wastewater remediation. Based on the present review, it is obvious that ECT is strongly dependent on the value of electric current or voltage applied to provide the required amounts of electro-coagulants for efficient remediation, reaction time duration for the generation of electro-coagulants and pollutants elimination, and electrode configuration such as shape, type of metal, and distance between electrodes. Other operating parameters include solution pH (since some pollutants are removed based on their cationic or anionic nature), type of electrolyte which affects the electric conductivity and ohmic drop and stirring speed that may influence the contact among numerous ions throughout the EC reactor. The core findings show that the ECT is highly effective, eco-friendly, and cost-effective in eliminating organic and inorganic pollutants from oily wastewater.

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Section: Ect Systemsupporting

confidence: 88%

Section: Ect In Hybrid Systemssupporting

confidence: 55%

Treatment of oily wastewater by electrocoagulation technology: A general review (2018-2022)

Jasim¹,

AlJaberi²

2022

J. Electrochem. Sci. Eng.

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“…As expected, the cost of electricity and aluminum electrodes were the most contributors to the total operation cost in the EC process, while it is the coagulant cost in the case of the CC process. It is worth noting that there are some attempts to reduce energy consumption in the EC process such as the use of renewable energy …”

Section: Results and Discussionmentioning

confidence: 99%

“…It is worth noting that there are some attempts to reduce energy consumption in the EC process such as the use of renewable energy. 71 3.4. Optimization and Validation.…”

Section: Resultsmentioning

confidence: 99%

Comparative Study of Chemical Coagulation and Electrocoagulation for the Treatment of Real Textile Wastewater: Optimization and Operating Cost Estimation

et al. 2022

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Pollutants derived from real textile wastewater present a high environmental risk. This work involves the study of the removal of chemical oxygen demand (COD), color, and turbidity from Tunisian real textile wastewater by two different water treatment technologies: chemical coagulation (CC) and electrocoagulation (EC). A comparative study between these two methods was conducted based on the separation performance and operating cost (OC). The effects of different operational parameters including electrolysis time ( t ), voltage, and pH for EC and the coagulant concentration, initial pH, and time of slow mixing ( t sm ) for CC were studied using response surface methodology. The developed quadratic models for the responses were in good agreement with the experimental data. The experiments proved the efficiency of both chemical and electrochemical techniques for the treatment of textile effluent. Indeed, by using EC, the reduction efficiencies of COD, color, and turbidity were 63.05, 99.07, and 96.31%, respectively, under optimal conditions (pH 9, t = 36.26 min, and voltage 4 V). For CC treatment, the achieved removal efficiencies of COD, color, and turbidity were 54.02, 96.21, and 93.7%, respectively, at pH 8.57, a coagulant concentration of 204.75 mg/L, and a t sm of 28.41 min as optimal operating conditions. The OC obtained for EC and CC was about 0.47 and 0.2 USD/m 3 , respectively. Even if the OC of the EC process was higher as compared to the CC process, the treated water obtained by EC meets the Tunisian Standards (NT 106.03 and NT 09-14) for textile wastewater discharge into the environment and demonstrates a high potential for its reuse in various industrial activities. EC technology can be integrated into a wastewater management system that ensures a zero liquid discharge of wastewater into the environment.

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“…The mechanism of the electro-Fenton (E-Fenton) method [ 40 ] involves the reduction of O 2 to H 2 O 2 at the cathode, which produces •OH radicals via the subsequent Fenton reaction involving Fe 2+ . These radicals then oxidize organic matter to CO 2 and H 2 O or small organic molecules [ 41 , 42 ].

…”

Section: Methodsmentioning

confidence: 99%

Three-Phase Three-Dimensional Electrochemical Process for Efficient Treatment of Greywater

Wang

Zhang³

2022

Membranes

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Water shortages around the world have intensified the search for substitute sources. Greywater can serve as a solution for water requirements. Compared to two-dimensional electrochemical processes for water treatment, the addition of particle activated carbon enhances the conductivity and mass transfer or the adsorption of pollutants in a three-dimensional (3D) electrochemical process. The large specific surface areas of these particles can provide more reactive sites, resulting in a higher removal efficiency. In this study, the treatment of greywater by the electro-Fenton (E-Fenton) method was carried out in a 3D electrolytic reactor. The effects of the operating conditions, such as electrode spacing, applied voltage, treatment time, and activated carbon loading, on the efficacy of the E-Fenton process were investigated, and the corresponding optimum conditions were found to be 7 cm, 9 V, 2 h, and 10 g. The results showed that CODCr removal of greywater treated using the 3D electrochemical process was 85%. With the help of the Box–Behnken experiment design and the response surface methodology, the parameters were optimized to determine the optimal conditions. The results of the response surface analysis were consistent with the experimental results. The above findings illustrate that the proposed three-phase 3D electrochemical process is feasible for the efficient treatment of greywater.

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Treatment of textile industry effluents by Electro-Coagulation and Electro-Fenton processes using solar energy: A comparative study

Cited by 40 publications

References 45 publications

Treatment of oily wastewater by electrocoagulation technology: A general review (2018-2022)

Treatment of oily wastewater by electrocoagulation technology: A general review (2018-2022)

Comparative Study of Chemical Coagulation and Electrocoagulation for the Treatment of Real Textile Wastewater: Optimization and Operating Cost Estimation

Three-Phase Three-Dimensional Electrochemical Process for Efficient Treatment of Greywater

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