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Keywords

Electrocoagulation, wastewater, textile, Optimization, Contaminants, Treatment

Document Type

Research Paper

Abstract

The textile industry is one of the largest polluters of water resources, producing effluents containing complex mixtures of pollutants such as dyes, heavy metals, and high biological oxygen demand. Electrocoagulation (EC) is an efficient wastewater treatment technique that uses iron or aluminum electrodes to coagulate and adsorb pollutants. This work assesses the performance of EC for textile wastewater treatment to identify the best combination of pH (5-9), electrolysis time (20-60 min), and voltage (5-11 V) on Chemical Oxygen Demand (COD) and color removal. The results show that voltage and electrolysis time had a positive effect on the efficiencies of pollutant removal, reaching the maximum efficiency of 70.06 and 87.36 when pH was 7, electrolysis time 60 min, and 11 V. The quadratic regression models obtained by Response Surface Methodology (RSM) had good predictive ability with the adjusted R² of 0.9684 for COD and 0.9843 for color. Statistical significance of the pH, voltage, and their interaction was further verified using the ANOVA test as significant factors that helped to explain the treatment effect. This study also highlights the possibility of using EC as a cost-effective and energy-saving technology compared to conventional chemical coagulation and advanced oxidation processes, with satisfactory treatment obtained at modest voltage and time demands. The study contributes to the knowledge of parameter optimization and enhances the applicability of EC in reducing the effects of textile effluents on the environment.

References

A. R. Shah, H. Tahir, H. M. K. Ullah, and A. Adnan, Optimization of electrocoagulation process for the removal of binary dye mixtures using response surface methodology and estimation of operating cost, Open J. Appl. Sci., 7 (2017) 458-484. https://doi.org/10.4236/ojapps.2017.79034 E. Dada, A. Akanni, and M. Akinola, Comparative physicochemical and genotoxicity assessments of textile mill company effluent and local tie-and-dye textile wastewater, J. Appl. Sci. Environ. Manage., 21 (2017) 877. https://doi.org/10.4314/jasem.v21i5.13 G. K. Singh, N. B. Singh, S. P. Shukla, and M. Tiwari, Remediation of cod and color from textile wastewater using dual stage electrocoagulation process, Sn Appl. Sci., 1 (2019) 1:1000. https://doi.org/10.1007/s42452-019-1046-7 K. P. Sharma, S. Sharma, P. K. Singh, S. Sharma, S. Kumar, R. Grover, and P. K.Sharma, A Comparative Study on Characterization of Textile Wastewaters (Untreated and Treated) Toxicity by Chemical and Biological Tests, Chemosphere, 69 (2007) 48-54. https://doi.org/10.1016/j.chemosphere.2007.04.086 A. Eslami, M. Moradi, F. Ghanbari and F. Mechdipour, Decolorization and cod removal from real textile wastewater by chemical and electrochemical Fenton processes: a comparative study, J. Environ. Health Sci. Eng., 11 (2013). https://doi.org/10.1186/2052-336x-11-31 T. Mohammed, and H. Al-Zuheri, A hybrid process of electrochemistry with magnetite nanoparticles for the treatment of turbid water, Assoc. Arab Univ. J. Eng. Sci., 26 (2019) 1-6. https://doi.org/10.33261/jaaru.2019.26.3.001 A. Hanako and A. Y. Bagastyo, Removal of remazol black b dye using recirculation batch electrocoagulation, IOP Conf. Ser.: Earth Environ. Sci., 1250 (2023) 012012. https://doi.org/10.1088/1755-1315/1250/1/012012 Z. Gündüz, and M. Atabey, Effects of operational parameters on the decolourisation of reactive red 195 dye from aqueous solutions by electrochemical treatment, Int. J. Electrochem. Sci., 14 (2019) 5868-5885. https://doi.org/10.20964/2019.06.37 J. Fadzli, S. W. Puasa, N. R. N. Him, K. H. K. Hamid, and N. Amri, Electrocoagulation: Removing colour and COD from simulated and actual batik wastewater, Desalin. Water Treat., 320 (2024) 100658. https://doi.org/10.1016/j.dwt.2024.100658 F. Ghanbari, M. Moradi, A .Eslami, M.M. Emamjomeh‏, Electrocoagulation/flotation of textile wastewater with simultaneous application of aluminum and iron as anode, Environ. Processes, 1 (2014) 447-457. https://doi.org/10.1007/s40710-014-0029-3 R. Mahmood, and N. Al-Musawi, Evaluating electrocoagulation process for water treatment efficiency using response surface methodology, J. Eng., 26 (2020) 11-23. https://doi.org/10.31026/j.eng.2020.09.02 K. Cruz-González, O. Torres-Lopez, A. M. García-León, E. Brillas, A. Hernández-Ramírez, and J. M. Peralta-Hernández, Optimization of Electro-Fenton/BDD Process for Decolorization of a Model Azo Dye Wastewater by Means of Response Surface Methodology, Desalination, 286 (2012) 63-68. https://doi.org/10.1016/j.desal.2011.11.005 J. Noguerol, A. Rodríguez-Abalde, E. Romero-Merino, and X. Ripoll, Determination of chemical oxygen demand in heterogeneous solid or semisolid samples using a novel method combining solid dilutions as a preparation step followed by optimized closed reflux and colorimetric measurement, Anal. Chem., 84 (2012) 5548-5555. https://doi.org/10.1021/ac3003566 S. Prayochmee, P. Weerayutsil, K. Khuanmar, Response surface optimization of electrocoagulation to treat real indigo dye wastewater, Pol. J. Environ. Stud., 30 (2021) 2265–2271. https://doi.org/10.1007/s41742-022-00419-4 Tooraj, M., Hossini, H., Kimya, P., Sheida, A., Maryam, S., Dariush, M., Borhan, A., et al., 2023, Future of sludge management, ed. Basak, K., Eduardo J.-L., Mariany C. D. and Leila Q. Z., Hardcover, London, W1W 5PF.https://doi.org/10.5772/intechopen.112984 Kumari, A., Maurya, N., Kumar, A., Yadav, R., Kumar, A., 2023. Options for the disposal and reuse of wastewater sludge, associated benefit, and environmental risk, ed., Başak K. T., London, W1W 5PF. https://doi.org/10.5772/intechopen.109410 I. Tabash, H. Elnakar, M. Khan, Optimization of iron electrocoagulation parameters for enhanced turbidity and chemical oxygen demand removal from laundry greywater, Sci. Rep., 14 (2024) 16468. https://doi.org/10.1038/s41598-024-67425-8 P. Dant, A. Jadhav, B. Bhalerao, Wastewater treatment using electrocoagulation: review, Int. Res. J. Modernization Eng. Technol. Sci., 5 (2023) 3943- 3952. https://doi.org/10.56726/irjmets35151 P. Patel, S. Gupta, P. Mondal, Life cycle assessment (LCA) of greywater treatment using zncl2 impregnated activated carbon and electrocoagulation processes: a comparative study, Ind. Eng. Chem. Res., 62 (2023) 3259-3270. https://doi.org/10.1021/acs.iecr.2c03353 L. Sharma, J. Rohilla, P. Ingole, A. Halder, Utilization of electrocoagulated sewage as a photoelectrocatalyst for water splitting, Acs Mater. Au, 4 (2024) 459-467. https://doi.org/10.1021/acsmaterialsau.4c00006 L. Bravo-Toledo, P. Virú-Vásquez, R. Rodríguez, L. Sierra-Flores, J. Flores-Salinas, J., Tineo-Cordova, F., et al., Sustainability prediction by evaluating the emergy of a co-treatment system for municipal wastewater and acidic water using intermittent electrocoagulation, Water, 16 (2024) 3081. https://doi.org/10.3390/w16213081 N. Etafo, D. Adekanmi, O. Awobifa, J. Torres, L. Herrera, and O. Awobifa, Clean and green: the multifaceted solution of the electrocoagulation technology in emerging contaminants in wastewater, Discov Civ Eng., 2 (2025). https://doi.org/10.1007/s44290-025-00261-5

Highlights

Electrocoagulation was evaluated for textile wastewater treatment using Response Surface Methodology pH, voltage, and electrolysis time significantly affected COD and color removal efficiency Optimal removal occurred at pH 7, electrolysis time 60 min, and 11 V, achieving high treatment performance Statistical models showed strong predictive accuracy, confirming key influential parameters Results supported electrocoagulation as a low-cost, energy-efficient treatment for textile wastewater

DOI

10.30684/etj.2025.161784.1974

First Page

766

Last Page

774

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