Приказ основних података о документу

dc.creatorLazarević, Slavica
dc.creatorMarjanović, Vesna
dc.creatorJanković-Častvan, Ivona
dc.creatorŽivković, Ljiljana
dc.creatorJanaćković, Đorđe
dc.creatorPetrović, Rada
dc.date.accessioned2021-03-10T13:54:09Z
dc.date.available2021-03-10T13:54:09Z
dc.date.issued2019
dc.identifier.issn1944-3994
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/4052
dc.description.abstractNatural and acid-activated sepiolites, functionalized by covalent grafting of [ 3-(2-aminoethylamino)propyl]trimethoxy-silane were used as adsorbents for the removal of an anionic Reactive Orange 16 dye from aqueous solutions. The influence of initial pH ( pH(i)) on the adsorption was first investigated in comparison with the adsorption onto unmodified sepiolites; then the dye removal process by modified samples was subjected to kinetic and equilibrium studies at pH(i) = 2.0 or 5.0, at different temperatures. Results showed that the adsorption of dye was favorable at lower pH(i) and at higher temperatures, in terms of adsorption capacity and rate of adsorption. The binding sites on the adsorbents surfaces were considered to be protonated amine groups, which play a role in the electrostatic interactions with the dye anions at pH(i) = 2.0. Formation of hydrogen bonds between hydrogen from amine groups and oxygen from the dye and van der Waals forces were proposed as the mechanisms of adsorption at pH(i) = 5.0. The adsorption kinetics was well fitted to the pseudo-second-order kinetic model, while the equilibrium adsorption data were well correlated with the Sips isotherm. The adsorption capacity of both modified sepiolites was much higher than of the parent samples, whereas the capacity of the functionalized acid-activated sepiolite was higher (similar to 172 mg/g) than of the functionalized natural sepiolite (similar to 158 mg/g) at 298 K, pH(i) 5.0.en
dc.publisherDesalination Publ, Hopkinton
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45019/RS//
dc.rightsrestrictedAccess
dc.sourceDesalination and Water Treatment
dc.subjectSepioliteen
dc.subjectFunctionalizationen
dc.subjectAdsorptionen
dc.subjectReactive Orange 16en
dc.subjectKineticsen
dc.titleEffective removal of Reactive Orange 16 dye from aqueous solution by amine-functionalized sepiolitesen
dc.typearticle
dc.rights.licenseARR
dc.citation.epage384
dc.citation.other163: 376-384
dc.citation.rankM23
dc.citation.spage376
dc.citation.volume163
dc.identifier.doi10.5004/dwt.2019.24437
dc.identifier.scopus2-s2.0-85073340489
dc.identifier.wos000484855400036
dc.type.versionpublishedVersion


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Приказ основних података о документу