Synergistic adsorption and photocatalysis using coffee husk-derived ZnO/hydrochar for efficient caffeine removal

Vista sencilla de ítem
dc.contributor.affiliationUniversidad de Medellín, Medellin, Colombia
dc.contributor.affiliationCentro de Investigacion y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico, Mexico
dc.contributor.affiliationCorporación Universitaria Remington, Medellin, Colombia
dc.contributor.affiliationUniversidad de Medellín, Medellin, Colombia
dc.contributor.affiliationUniversidad de Medellín, Medellin, Colombia
dc.contributor.affiliationTecnológico de Antioquia, Medellin, Colombia
dc.contributor.affiliationTecnológico de Antioquia, Medellin, Colombia
dc.contributor.authorV., Ospina-Montoya, Valentina
dc.contributor.authorN.Y., Acelas, Nancy Y.
dc.contributor.authorS., Pérez, Sebastián
dc.contributor.authorJ., Muñoz-Saldaña, Juan
dc.contributor.authorJ., Porras, Jazmín
dc.contributor.authorJ.L., Gallego, Jorge L.
dc.contributor.authorM.I., Mejía, María Isabel
dc.contributor.authorL.A., Hoyos Giraldo, Leidy A.
dc.contributor.authorS., Valencia, Sergio
dc.contributor.authorA., Forgionny, Angélica
dc.date.accessioned2025-12-03T19:34:45Z
dc.date.available2025-12-03T19:34:45Z
dc.date.issued2025
dc.descriptionCaffeine is an emerging environmental contaminant due to its persistence and widespread presence in aquatic environments. Aligning with circular economy principles, this study utilizes coffee husk (CH), a major agro-industrial waste, to synthesize a bifunctional ZnO/hydrochar composite for combined adsorption and photocatalysis. The materials were prepared hydrothermally using varying CH amounts (0.25-1.0g), resulting in HZnO-x, composites when x indicates the final mass fraction of hydrochar. Characterization showed ZnO nanoflakes and nanorods (wurtzite phase) supported on hydrochar (11.4-40.6wt%). HZnO-0.4, with 40.6wt% hydrochar, exhibited a reduced bandgap (3.11eV) and superior adsorption. Optimal caffeine removal occurred at pH ∼6 and 0.6gL⁻1dosage. Adsorption dominated at low caffeine concentrations and high adsorbent dosages, achieving 96.5% and 80% removal for 5 and 10mgL⁻1, respectively. At lower adsorbent dosage (0.3gL⁻1), photodegradation became dominant (52%), while adsorption dropped to 42%. A synergistic effect enabled complete caffeine removal (90-100%) across 5-10mgL⁻1concentrations. In darkness, removal was primarily via adsorption; under light, ZnO functioned as a photocatalyst, generating reactive oxygen species (ROS) such as singlet oxygen and superoxide radicals. These species degraded caffeine into hydroxylated and ring-opened products. Post-treatment analyses confirmed the structural stability of ZnO and hydrochar, and HZnO-0.4 maintained performance over repeated cycles. This study demonstrates the potential of coffee husk-derived ZnO/hydrochar composites as sustainable, efficient materials for wastewater treatment. © 2025 Elsevier B.V., All rights reserved.
dc.identifier.doi10.1016/j.jece.2025.118306
dc.identifier.instnameinstname:Universidad de Medellínspa
dc.identifier.issn22133437
dc.identifier.reponamereponame:Repositorio Institucional Universidad de Medellínspa
dc.identifier.repourlrepourl:https://repository.udem.edu.co/
dc.identifier.urihttp://hdl.handle.net/11407/9244
dc.language.isoeng
dc.publisherElsevier Ltdspa
dc.publisher.facultyFacultad de Ingenierías-Instituto de Ciencias Básicasspa
dc.publisher.programIngeniería de Sistemasspa
dc.relation.citationissue5
dc.relation.citationvolume13
dc.relation.isversionofhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-105015139556&doi=10.1016%2Fj.jece.2025.118306&partnerID=40&md5=30e3490a25c71d2ce6160c899c5dc689
dc.relation.referencesKumar Mishra, Ranjeet Kumar, Emerging pollutants of severe environmental concern in water and wastewater: A comprehensive review on current developments and future research, Water-Energy Nexus, 6, pp. 74-95, (2023)
dc.relation.referencesReddy, Vundrala Sumedha, Pharmacology of caffeine and its effects on the human body, European Journal of Medicinal Chemistry Reports, 10, (2024)
dc.relation.referencesAl-Bratty, Mohammed Mofarreh A., Fast and efficient removal of caffeine from water using dielectric barrier discharge, Applied Water Science, 11, 6, (2021)
dc.relation.referencesNolasco, Agata, Valorization of coffee industry wastes: Comprehensive physicochemical characterization of coffee silverskin and multipurpose recycling applications, Journal of Cleaner Production, 370, (2022)
dc.relation.referencesCheng, Chen, Insights into pyrolysis process of coconut shell waste hydrochar: In-situ structural evolution and reaction kinetics, Journal of Cleaner Production, 448, (2024)
dc.relation.referencesHoang, Van Hung, Recycling paper sludge into hydrochar and ZnO nanocomposite for enhanced ammonium adsorption in aqueous solutions, RSC Advances, 15, 9, pp. 6634-6651, (2025)
dc.relation.referencesKhader, Eman H., Recent advances in photocatalytic advanced oxidation processes for organic compound degradation: A review, Desalination and Water Treatment, 318, (2024)
dc.relation.referencesJing, Hongyu, Efficient adsorption/photodegradation of organic pollutants from aqueous systems using Cu2O nanocrystals as a novel integrated photocatalytic adsorbent, Journal of Materials Chemistry A, 2, 35, pp. 14563-14570, (2014)
dc.relation.referencesSafri, Anam, Integrated Adsorption–Photodegradation of Organic Pollutants by Carbon Xerogel/Titania Composites, Molecules, 27, 23, (2022)
dc.relation.referencesSamir, Brahim, Preparation and Modification of Activated Carbon for the Removal of Pharmaceutical Compounds via Adsorption and Photodegradation Processes: A Comparative Study, Applied Sciences (Switzerland), 13, 14, (2023)
dc.rights.accesoRestricted access
dc.rights.accessrightsinfo:eu-repo/semantics/restrictedAccess
dc.sourceJournal of Environmental Chemical Engineering
dc.sourceScopus
dc.subjectAdsorption
dc.subjectCaffeine
dc.subjectCoffee Husk
dc.subjectDegradation
dc.subjectHydrochar
dc.subjectPhotocatalysis
dc.subjectZinc Oxide
dc.subjectCoffee
dc.subjectDriers (materials)
dc.subjectIndustrial Economics
dc.subjectOxygen
dc.subjectPhotodegradation
dc.subjectStability
dc.subjectWastewater Treatment
dc.subjectZinc Sulfide
dc.subjectAdsorbent Dosage
dc.subjectAgro-industrial Wastes
dc.subjectAquatic Environments
dc.subjectBi-functional
dc.subjectCircular Economy
dc.subjectCoffee Husks
dc.subjectEnvironmental Contaminant
dc.subjectHydrochar
dc.subjectSynergistic Adsorptions
dc.subjectZno
dc.subjectAdsorption
dc.subjectCaffeine
dc.subjectIi-vi Semiconductors
dc.subjectPhotocatalysis
dc.subjectZinc Oxide
dc.titleSynergistic adsorption and photocatalysis using coffee husk-derived ZnO/hydrochar for efficient caffeine removal
dc.typeArticle
dc.type.localArtículospa
dc.type.versioninfo:eu-repo/semantics/publishedVersion

Archivos

Colecciones

Indexados Scopus