Effective removal of dyes from aqueous systems by waste-derived carbon adsorbent: physicochemical characterization and adsorption studies

Basit Öğe Kaydı
dc.contributor.authorKuyucu, Ali Ender
dc.contributor.authorSelcuk, Ahmet
dc.contributor.authorOnal, Yunus
dc.contributor.authorAlacabey, Ihsan
dc.contributor.authorErol, Kadir
dc.date.accessioned2026-04-04T13:34:41Z
dc.date.available2026-04-04T13:34:41Z
dc.date.issued2025
dc.departmentİnönü Üniversitesi
dc.description.abstractDue to their cost-effectiveness and high surface area, activated carbons are commonly used for the adsorption of dyes from aqueous solutions. In this study, activated carbon was synthesized from walnut shell waste via KOH activation (1:3 ratio), yielding a surface area of 2347.4 m(2)/g. Reactive Blue 19 and Reactive Red 195 adsorption behavior were studied under varying experimental conditions. These included natural pH values (6.8-7.2), dye concentrations between 50 and 1250 mg L-1, and adsorbent dosages ranging from 0.1 to 1.0 g. Adsorption equilibrium was achieved within 150 min. The maximum adsorption capacities were found to be 1227.17 mg g(-1) for RB 19 and 235.74 mg g(-1) for RR 195. Isotherm modeling was conducted using Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich models, with Freundlich providing the best fit for both dyes, indicating multilayer adsorption on heterogeneous surfaces. Thermodynamic analysis revealed that the adsorption processes were spontaneous and endothermic, with negative Gibbs free energy (Delta G degrees), positive enthalpy (Delta H degrees), and positive entropy (Delta S degrees) values. These results highlight the high adsorption performance and practical potential of walnut shell-derived activated carbon for dye removal from wastewater.
dc.description.sponsorshipScientific Research Projects Coordination Unit of Van Yuzuncu Yimath;l University [FDK-2019-7784]
dc.description.sponsorshipThis study was supported by the Scientific Research Projects Coordination Unit of Van Yuzuncu Y & imath;l University under Project Number FDK-2019-7784.
dc.identifier.doi10.1038/s41598-025-13685-x
dc.identifier.issn2045-2322
dc.identifier.issue1
dc.identifier.orcid0000-0001-9158-6091
dc.identifier.orcid0000-0001-6247-4285
dc.identifier.orcid0000-0002-3080-2296
dc.identifier.orcid0000-0001-6342-6816
dc.identifier.pmid40770027
dc.identifier.scopus2-s2.0-105012745935
dc.identifier.scopusqualityN/A
dc.identifier.urihttps://doi.org/10.1038/s41598-025-13685-x
dc.identifier.urihttps://hdl.handle.net/11616/109338
dc.identifier.volume15
dc.identifier.wosWOS:001549768800027
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherNature Portfolio
dc.relation.ispartofScientific Reports
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20250329
dc.subjectActivated carbon
dc.subjectAdsorption
dc.subjectDye
dc.subjectIsotherm
dc.subjectKinetic
dc.subjectWalnut shell
dc.titleEffective removal of dyes from aqueous systems by waste-derived carbon adsorbent: physicochemical characterization and adsorption studies
dc.typeArticle

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
PubMed İndeksli Yayın Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu