Efficient treatment for textile wastewater through sequential electrocoagulation, electrochemical oxidation and adsorption processes: Optimization and toxicity assessment

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dc.citation.journalTitleJOURNAL OF ELECTROANALYTICAL CHEMISTRYeng
dc.contributor.authorGilPavas E.
dc.contributor.authorDobrosz-Gómez I.
dc.contributor.authorGómez-García M.-Á.
dc.contributor.departmentUniversidad EAFIT. Departamento de Ingeniería de Procesosspa
dc.contributor.researchgroupDesarrollo y Diseño de Procesosspa
dc.date.accessioned2021-04-12T19:06:22Z
dc.date.available2021-04-12T19:06:22Z
dc.date.issued2020-01-01
dc.description.abstractIn this work, the sequential Electrocoagulation + Electro-oxidation + Activated carbon adsorption (EC + EO + AC) process was studied as an alternative for the treatment of an industrial textile wastewater (TWW) issuing from a manufacturing company located in Medellín (Colombia). The EC's and EO's operational conditions were optimized using a Box-Behnken experimental design, the Response Surface Methodology and a constrained nonlinear optimization algorithm in terms of organic matter degradation efficiency. The best performance for EC (i. e., dye removal = 94%, COD and TOC degradation of 45 and 40%, respectively) was obtained using Fe anode and Boron Doped Diamond (BDD) cathode, with current density, jEC, equals to 5 mA/cm2, pH = 9.3, 60 RPM and 10 min of electrolysis. After EC treatment, the effluent biodegradability (evaluated as the BOD5/COD ratio) increases from 0.14 to 0.23. Regrettably, EC was not effective for the removal of acute toxicity to Artemia salina since the treated effluent remained very toxic (100%). The treatment of EC's effluent by EO enhanced organic pollutant removal. For EC + EO sequential process, EO optimal operational conditions (jEO = 10 mA/cm2, pH = 3, 240 RPM, BDD as anode and Fe as cathode) allowed reduction of 100% of color, 88% of COD and 79% of TOC after 30 min of electrolysis. Moreover, the BOD5/COD ratio increased from 0.23 to 0.58; however, the treated effluent remained very toxic to the Artemia salina. Consequently, an activated carbon adsorption step was included to complete the treatment process. Thus, by coupling the EC + EO + AC process, effluent's acute toxicity decreased completely. From molecular weight distribution analysis, it was concluded that EC + EO was efficient in eliminating low molecular weight (< 5 kDa) compounds. Finally, the operation cost, which includes chemical reagents, electrodes, energy consumption, and sludge disposal, for the EC + EO + AC sequential process was estimated in 3.83 USD /m3. © 2020 Elsevier B.V.eng
dc.identifierhttps://eafit.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=12158
dc.identifier.doi10.1016/j.jelechem.2020.114578
dc.identifier.issn15726657
dc.identifier.issn18732569
dc.identifier.otherWOS;000593969800015
dc.identifier.otherSCOPUS;2-s2.0-85089855533
dc.identifier.urihttp://hdl.handle.net/10784/28278
dc.language.isoeng
dc.publisherElsevier BV
dc.relationDOI;10.1016/j.jelechem.2020.114578
dc.relationWOS;000593969800015
dc.relationSCOPUS;2-s2.0-85089855533
dc.relation.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85089855533&doi=10.1016%2fj.jelechem.2020.114578&partnerID=40&md5=e80bea2e9508972219c0d9c71ac2c8eb
dc.rightsElsevier BV
dc.sourceJOURNAL OF ELECTROANALYTICAL CHEMISTRY
dc.subjectActivated carboneng
dc.subjectActivated carbon treatmenteng
dc.subjectAdsorptioneng
dc.subjectAnodeseng
dc.subjectBiodegradabilityeng
dc.subjectBoolean functionseng
dc.subjectCathodeseng
dc.subjectChemical oxygen demandeng
dc.subjectCoagulationeng
dc.subjectConstrained optimizationeng
dc.subjectDegradationeng
dc.subjectEffluent treatmenteng
dc.subjectElectrochemical oxidationeng
dc.subjectElectrolysiseng
dc.subjectElectrooxidationeng
dc.subjectEnergy utilizationeng
dc.subjectIndustrial water treatmenteng
dc.subjectIroneng
dc.subjectMolecular weight distributioneng
dc.subjectNonlinear programmingeng
dc.subjectOrganic pollutantseng
dc.subjectSludge disposaleng
dc.subjectTextile industryeng
dc.subjectTextileseng
dc.subjectToxicityeng
dc.subjectWastewater disposaleng
dc.subjectWastewater treatmenteng
dc.subjectActivated carbon adsorptioneng
dc.subjectBox-Behnken experimental designeng
dc.subjectConstrained non-linear optimizationseng
dc.subjectLow molecular weighteng
dc.subjectManufacturing companieseng
dc.subjectOperational conditionseng
dc.subjectOrganic matter degradationseng
dc.subjectResponse surface methodologyeng
dc.subjectEffluentseng
dc.titleEfficient treatment for textile wastewater through sequential electrocoagulation, electrochemical oxidation and adsorption processes: Optimization and toxicity assessmenteng
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.typeinfo:eu-repo/semantics/articleeng
dc.typearticleeng
dc.typeinfo:eu-repo/semantics/publishedVersioneng
dc.typepublishedVersioneng
dc.type.localArtículospa

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