Physicochemical study of amino-functionalized organosilicon cubes intercalated in montmorillonite clay: H-binding and metal uptake

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dc.contributor.authorBalomenou, G.en
dc.contributor.authorStathi, P.en
dc.contributor.authorEnotiadis, A.en
dc.contributor.authorGournis, D.en
dc.contributor.authorDeligiannakis, Y.en
dc.date.accessioned2015-11-24T17:37:18Z
dc.date.available2015-11-24T17:37:18Z
dc.identifier.issn0021-9797-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/14338
dc.rightsDefault Licence-
dc.subjectmontmorilloniteen
dc.subjectzenithen
dc.subjectclayen
dc.subjectscmen
dc.subjectaminoen
dc.subjectheavy metalen
dc.subjectcuen
dc.subjectcden
dc.subjectpben
dc.subjectfiteqlen
dc.subjectorganosiliconen
dc.subjectcubanesen
dc.subjectheavy-metalsen
dc.subjectoctameric siloxanesen
dc.subjectadsorptionen
dc.subjectsorptionen
dc.subjectmineralsen
dc.subjectremovalen
dc.subjectsurfaceen
dc.subjectsilicaen
dc.subjectaciden
dc.subjectphosphatesen
dc.titlePhysicochemical study of amino-functionalized organosilicon cubes intercalated in montmorillonite clay: H-binding and metal uptakeen
heal.abstractTwo organic-modified montmorillonite clays were prepared by embedding organosilanes hearing different chelating amino-functional groups [Apteos] (3-amino-propyltriethoxysilane), and [Edaptmos] (3-(2-aminoethylamino)propyltrimethoxysilane), in the interlayer space of a Zenith montmorillonite. XRD and FTIR spectroscopic data show that the amino organosilanes are intercalated into the interlamelar space forming cube-like structures bearing one polymanino tail at each cube apex. The intercalated cubes Cause an increase of the interlayer spacing of the clay sheets by 6.6 angstrom in [Zenith-Apteos] and by 7.1 angstrom in [Zenith-Edaptmos]. The H-binding properties of the intercalated polyamino organosilanes were studied by potentiometric titration. The Cu-, Cd-, and Pb-binding capacity of [Zenith-Apteos] and [Zenith-Edaptmos] were evaluated in aqueous solution as a function of the pH. Both [Zenith-Apteos] and [Zenith-Edaptmos] showed improvement vs Zenith for metal binding in the order Cu > Pb > Cd. [Zenith-Edaptmos] showed the most important results vs Zenith. Theoretical analysis of the pH edge, achieved by a surface complexation model, shows that (a) the amino-functionalized cube-like structures constitute high affinity metal-binding sites; and (b) the metal ions are bound in a monodendate mode with the amino group of the cube, thus resulting in a maximization of metal-binding efficiency. (C) 2008 Elsevier Inc. All rights reserved.en
heal.accesscampus-
heal.fullTextAvailabilityTRUE-
heal.identifier.primaryDOI 10.1016/j.jcis.2008.04.072-
heal.identifier.secondary<Go to ISI>://000258791800009-
heal.journalNameJ Colloid Interface Scien
heal.journalTypepeer reviewed-
heal.languageen-
heal.publicationDate2008-
heal.publisherElsevieren
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Επιστήμης Υλικώνel
heal.typejournalArticle-
heal.type.elΆρθρο Περιοδικούel
heal.type.enJournal articleen

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