Advanced electrocoagulation using aluminum electrodes supported by persulfate for the treatment of a high-strength wastewater

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dc.authorid0000-0003-4178-0990
dc.authorid0000-0002-3540-3235
dc.contributor.authorYokus, Senem
dc.contributor.authorBilgin, Oyku Nur
dc.contributor.authorYilmaz, Ezgi Unal
dc.contributor.authorGundogdu, Hilal
dc.contributor.authorGuvenc, Senem Yazici
dc.contributor.authorCan-Guven, Emine
dc.contributor.authorVarank, Gamze
dc.date.accessioned2026-02-12T21:05:17Z
dc.date.available2026-02-12T21:05:17Z
dc.date.issued2023
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractIn this study, the treatment of leachate nanofiltration (NF) concentrate, which is high -strength wastewater, by advanced electrocoagulation (EC) was investigated. The EC pro-cess, in which aluminum electrodes were used, was enhanced by persulfate (PS) addition (EC-PS). First, the control experiments were conducted then the operating parameters of the process were optimized by the Box-Behnken design. Process variables were PS dose, applied current, initial pH, and reaction time while chemical oxygen demand (COD), total organic carbon (TOC), UV254, and color removal were the system responses. COD, TOC, UV254, and color removal efficiencies by the validation studies performed under optimized conditions (PS dose: 0.590 g/L; applied current: 0.710 A; initial pH: 5, and reaction time: 31.4 min) were 62.6%, 54.3%, 74.2%, and 88.0%, respectively. Based on the degree of effect on COD and TOC removal, statistical analysis parameters can be listed as linear, quad-ratic, and interactive from higher to lower one. The linear parameters can be listed as initial pH, applied current, reaction time, and PS dose according to the level of their effect on removal efficiencies. Quenching experiments showed that sulfate and hydroxyl radi-cals work together in the process while hydroxyl radicals were more effective. The specific energy consumption and total cost of the process under optimized operating conditions were 1.90 kWh/kg COD and 1.40 $/m3 respectively. By obtaining the spectrum of the sludge formed under optimum process conditions by Fourier Transform Infrared Spectroscopy analysis, the characteristics of the sludge were determined and Al hydroxides and hy-drocarbons were present in the sludge. (c) 2023 Institution of Chemical Engineers. Published by Elsevier Ltd. All rights reserved.
dc.description.sponsorshipYildiz Technical University-The Scientific Research Projects Coordinatorship [FBA-2022-4710]
dc.description.sponsorshipAcknowledgment This research was supported by Yildiz Technical University-The Scientific Research Projects Coordinatorship with the research project number FBA-2022-4710.
dc.identifier.doi10.1016/j.cherd.2023.04.046
dc.identifier.endpage210
dc.identifier.issn0263-8762
dc.identifier.issn1744-3563
dc.identifier.scopus2-s2.0-85154574342
dc.identifier.scopusqualityQ2
dc.identifier.startpage192
dc.identifier.urihttps://doi.org/10.1016/j.cherd.2023.04.046
dc.identifier.urihttps://hdl.handle.net/20.500.12885/6873
dc.identifier.volume194
dc.identifier.wosWOS:000989275900001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofChemical Engineering Research & Design
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20260212
dc.subjectBox-Behnken design
dc.subjectElectrocoagulation
dc.subjectOptimization
dc.subjectPersulfate
dc.subjectProcess cost
dc.titleAdvanced electrocoagulation using aluminum electrodes supported by persulfate for the treatment of a high-strength wastewater
dc.typeArticle

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