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Article

Investigating the Electrocoagulation Treatment of Landfill Leachate by Iron/Graphite Electrodes: Process Parameters and Efficacy Assessment

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Department of Environmental Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz 7153675541, Iran
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Research Center for Health Sciences, Department of Environmental Health, School of Health, Shiraz 7153675541, Iran
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Department of Occupational Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz 7153675541, Iran
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Department of Environmental Health Engineering, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd 8915173160, Iran
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Departamento de Ingeniería Civil: Hidráulica, Energía y Medio Ambiente, E.T.S. de Ingenieros de Caminos, Canales y Puertos, Universidad Politécnica de Madrid, Unidad Docente Ingeniería Sanitaria, c/Profesor Aranguren, s/n, ES-28040 Madrid, Spain
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School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huai’an 223003, China
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Authors to whom correspondence should be addressed.
Academic Editor: Christos S. Akratos
Water 2022, 14(2), 205; https://doi.org/10.3390/w14020205
Received: 23 November 2021 / Revised: 3 January 2022 / Accepted: 5 January 2022 / Published: 11 January 2022
(This article belongs to the Section Wastewater Treatment and Reuse)
Electrocoagulation is a widely used method for treating leachate since it is cost effective and eco-friendly. In the present study, the electrocoagulation process was employed to remove chemical oxygen demand (COD), NH4+, total dissolved solids (TDS), total suspended solids (TSS), turbidity, and color from landfill leachate. At first, lime was used as a pretreatment, then the Fe/Gr and Ti/PbO2/steel electrodes were used, and the optimum electrode was selected. Afterwards, the effects of some variables, including pH, current density, temperature, the inter-electrode distance, and the type of electrolyte were investigated. Results showed that COD, NH4+, TSS, TDS, electrical conductivity (EC), turbidity, color, and pH of effluent pretreatment chemical reached 22,371, 385, 884, 21,820 (mg/L), 13.8 (ms/cm3), 1355 (NTU), 8500 (TCU) and 10, respectively (the removal efficiency was 0, 20.37, 32.4, 61.99, 59.18, and 56.6 percent). With the Fe/Gr electrode, the optimal condition was observed as follows: pH of 7.5, current density of 64 mA/cm2, inter-electrode distance was equal to 1.5 cm, temperature at 20 °C, and retention time 2–4 h. Overall, the electrocoagulation with the Fe/Gr electrode was a suitable technology for landfill leachate treatment due to its effectiveness for the removal of both COD and NH4+, with advantageous performance indicators. View Full-Text
Keywords: electrocoagulation; leachate; landfill; treatment optimization; contaminant degradation electrocoagulation; leachate; landfill; treatment optimization; contaminant degradation
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MDPI and ACS Style

Rookesh, T.; Samaei, M.R.; Yousefinejad, S.; Hashemi, H.; Derakhshan, Z.; Abbasi, F.; Jalili, M.; Giannakis, S.; Bilal, M. Investigating the Electrocoagulation Treatment of Landfill Leachate by Iron/Graphite Electrodes: Process Parameters and Efficacy Assessment. Water 2022, 14, 205. https://doi.org/10.3390/w14020205

AMA Style

Rookesh T, Samaei MR, Yousefinejad S, Hashemi H, Derakhshan Z, Abbasi F, Jalili M, Giannakis S, Bilal M. Investigating the Electrocoagulation Treatment of Landfill Leachate by Iron/Graphite Electrodes: Process Parameters and Efficacy Assessment. Water. 2022; 14(2):205. https://doi.org/10.3390/w14020205

Chicago/Turabian Style

Rookesh, Tahereh, Mohammad R. Samaei, Saeed Yousefinejad, Hassan Hashemi, Zahra Derakhshan, Fariba Abbasi, Mahrokh Jalili, Stefanos Giannakis, and Muhammad Bilal. 2022. "Investigating the Electrocoagulation Treatment of Landfill Leachate by Iron/Graphite Electrodes: Process Parameters and Efficacy Assessment" Water 14, no. 2: 205. https://doi.org/10.3390/w14020205

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