Removal of lead ions (Pb2+) from aqueous solution using chitosan/starch composite material: Experimental and density functional theory findings

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dc.authoridCaylak, Osman/0000-0001-8227-3456
dc.contributor.authorCelik, Muhammed Safa
dc.contributor.authorCaylak, Osman
dc.contributor.authorKutuk, Nursah
dc.contributor.authorYenidunya, Ali Fazil
dc.contributor.authorCetinkaya, Serap
dc.contributor.authorMaslov, Mikhail M.
dc.contributor.authorKaya, Savas
dc.date.accessioned2024-10-26T18:05:38Z
dc.date.available2024-10-26T18:05:38Z
dc.date.issued2024
dc.departmentSivas Cumhuriyet Üniversitesi
dc.description.abstractTreatment of wastewater has become vital to prevent environmental pollution in recent years. Adsorption is an easily applicable, low-cost and efficient method and is the subject of this study. In this study, an adsorbent was synthesized to be used in heavy metal removal using chitosan and starch. The composite was characterized by Fourier transform infrared (FTIR) spectrophotometry, X-ray powder diffraction (XRD), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) analysis. It was determined that the composite had an amorphous and compact structure. Adsorption experiments were carried out under the optimized parameters such as solution pH, concentration, adsorbent amount, equilibrium time, and temperature. It shows that during adsorption, with the increase in pH, the adsorption efficiency and adsorption capacity first increase and then a fluctuation occurs. The highest adsorption efficiency and Q value were reached at pH 3.46 as 78% and 0.038 mol/kg, respectively. Moreover, the adsorption capacity (Q) reached its highest value with a value of 0.067 mol/kg in the presence of 30 mg adsorbent. Equilibrium experiments were validated by the Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherm models. To investigate the adsorption mechanism, pseudo-first-order (PFO) and pseudo-second-order (PSO) kinetic models were used. It was determined that the adsorption process followed the D-R isotherm (R-2 = 0.99) and PSO (R-2 = 0.99). Therefore, the existence of chemical adsorption can be mentioned. Thermodynamic parameters enthalpy (triangle H), Gibbs free energy (triangle G) and entropy change (triangle S) were investigated. The adsorbate-adsorbent interactions were studied by density functional theory (DFT).
dc.description.sponsorshipSivas Cumhuriyet University
dc.description.sponsorshipNo Statement Available
dc.identifier.doi10.1007/s13399-024-05287-w
dc.identifier.issn2190-6815
dc.identifier.issn2190-6823
dc.identifier.scopus2-s2.0-85184231190
dc.identifier.scopusqualityQ3
dc.identifier.urihttps://doi.org/10.1007/s13399-024-05287-w
dc.identifier.urihttps://hdl.handle.net/20.500.12418/29099
dc.identifier.wosWOS:001158321200001
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer Heidelberg
dc.relation.ispartofBiomass Conversion and Biorefinery
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectAdsorption
dc.subjectChitosan
dc.subjectComposite
dc.subjectDFT
dc.subjectStarch
dc.titleRemoval of lead ions (Pb2+) from aqueous solution using chitosan/starch composite material: Experimental and density functional theory findings
dc.typeArticle

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