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dc.creatorMilićević, Sonja
dc.creatorMartinović, Sanja
dc.creatorMilošević, Vladan
dc.creatorStojanović, Jovica
dc.creatorPovrenović, Dragan
dc.date.accessioned2023-04-21T11:36:06Z
dc.date.available2023-04-21T11:36:06Z
dc.date.issued2018
dc.identifier.issn1388-6150
dc.identifier.urihttps://ritnms.itnms.ac.rs/handle/123456789/462
dc.description.abstractSystematic modification of three structurally different minerals (zeolite, mica, and vermiculite) was carried out with the aim of determining the modification mechanism and exposing the hydrophobic surface that can be used as a sorbent for many organic compounds. Mechanism of modification with cationic surfactant depends strongly on the mineral type. In order to identify the influence of aluminosilicates structural differences on the modification process, adsorption experiments with organic matter and water vapor, supplemented with the DTA/TG analysis, were performed. The cation exchange capacity (CEC) value was 1454>560>28meqkg(-1) for zeolite (clinoptilolite), vermiculite, and mica (muscovite), respectively. Despite its CEC value, vermiculite adsorbed three times the amount of organic matter than did clinoptilolite due to the porous structure of zeolite, which acted to limit the adsorption only on the external exchangeable cations. If the loading amount is equal to the CEC or the external cation exchange capacity for clinoptilolite (ECEC approximate to 10% CEC), the monolayer will form while mineral surface will have hydrophobic character. Only one active center exists at the surface of the clinoptilolite that was identified by DTA curves with a sharp and defined peak around 300 degrees C and by the mass loss at the TG diagrams. Two significant and equal active centers were observed in vermiculite, one for the exchange of the surface cations and the other for the interlayer cations and H2O molecules. Muscovite CEC is negligible, and due to the absence of any other functional groups, the modification of this mineral was impossible.en
dc.publisherSpringer, Dordrecht
dc.relationinfo:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/33007/RS//
dc.rightsrestrictedAccess
dc.sourceJournal of Thermal Analysis and Calorimetry
dc.subjectVermiculiteen
dc.subjectThermal analysisen
dc.subjectOrganic matteren
dc.subjectMuscoviteen
dc.subjectModificationen
dc.subjectClinoptiloliteen
dc.titleDifferences in coating mechanism of structurally different aluminosilicates observed through the thermal analysisen
dc.typearticle
dc.rights.licenseARR
dc.citation.epage1019
dc.citation.issue2
dc.citation.other134(2): 1011-1019
dc.citation.rankM21
dc.citation.spage1011
dc.citation.volume134
dc.identifier.doi10.1007/s10973-018-7351-3
dc.identifier.rcubconv_836
dc.identifier.scopus2-s2.0-85047188339
dc.identifier.wos000450801000018
dc.type.versionpublishedVersion


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