Peroxymonosulfate activation by nitrogen-doped sludge from drinking water treatment for organic pollutants removal

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dc.contributor.affiliationUniversidad de Antioquia, Medellin, Colombia
dc.contributor.affiliationUniversidad de Medellín, Medellin, Colombia
dc.contributor.affiliationUniversidad de Antioquia, Medellin, Colombia
dc.contributor.authorC.C., Castro-Jiménez, Camilo C.
dc.contributor.authorN.Y., Acelas, Nancy Y.
dc.contributor.authornull
dc.contributor.authorJ.C., Saldarriaga-Molina, Julio César
dc.contributor.authorE.F., García-Aristizábal, Edwin F.
dc.date.accessioned2025-12-03T19:34:48Z
dc.date.available2025-12-03T19:34:48Z
dc.date.issued2025
dc.descriptionDrinking water treatment sludge (WTS) was used to produce nitrogen-doped (N-doped) catalysts. Urea and the one-step pyrolysis method were used to prepare the catalysts, which were used to activate peroxymonosulfate (PMS) and degrade methyl orange (MO) in water. The NWTS-1 catalyst synthesized using solid urea at a 1:1 mass ratio, demonstrating the most effective synergistic interaction with PMS for MO degradation. The NWTS-1/PMS system effectively oxidized MO, achieving over 98 % MO removal in 10 min, with a pseudo-first-order rate removal of 0.74 min−1, a low consumption of PMS (0.5 mM), and a low catalyst loading (0.5 g L−1). The presence of Cl− enhanced degradation, while HCO₃− and humic acid inhibited it. Quenching tests indicated that the superoxide anion radical (O<inf>2</inf>•−) (radical pathway) and singlet oxygen (1O<inf>2</inf>) (nonradical pathway) play a crucial role in MO degradation. The leading active site for PMS activation was identified as graphitic-N. Also, NWTS-1 showed no significant efficiency loss after five consecutive reuse cycles. Additionally, the NWTS-1/PMS treatment showed significant MO removals (>90 %) after 15 min in both municipal and textile wastewaters. This study highlights a sustainable approach to valorise drinking water treatment sludge by producing N-doped catalysts with potential applications in water pollution control. © 2025 Elsevier B.V., All rights reserved.
dc.identifier.doi10.1016/j.jwpe.2025.108801
dc.identifier.instnameinstname:Universidad de Medellínspa
dc.identifier.issn22147144
dc.identifier.reponamereponame:Repositorio Institucional Universidad de Medellínspa
dc.identifier.repourlrepourl:https://repository.udem.edu.co/
dc.identifier.urihttps://hdl.handle.net/11407/9255
dc.language.isoeng
dc.publisherElsevier Ltdspa
dc.publisher.facultyInstituto de Ciencias Básicasspa
dc.relation.citationvolume78
dc.relation.isversionofhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-105017292807&doi=10.1016%2Fj.jwpe.2025.108801&partnerID=40&md5=97342d5eb113d472cd928c9fb56de996
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dc.rights.accesoRestricted access
dc.rights.accessrightsinfo:eu-repo/semantics/restrictedAccess
dc.sourceJournal of Water Process Engineering
dc.sourceScopus
dc.subjectCatalytic Oxidation
dc.subjectDrinking Water Treatment Sludge
dc.subjectNitrogen Doping
dc.subjectPeroxymonosulfate Activation
dc.subjectWater Treatment
dc.titlePeroxymonosulfate activation by nitrogen-doped sludge from drinking water treatment for organic pollutants removal
dc.typeArticle
dc.type.localArtículospa
dc.type.versioninfo:eu-repo/semantics/publishedVersion

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