Please use this identifier to cite or link to this item: https://olympias.lib.uoi.gr/jspui/handle/123456789/9991
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dc.contributor.authorFalaras, P.en
dc.contributor.authorLezou, F.en
dc.contributor.authorSeiragakis, G.en
dc.contributor.authorPetrakis, D.en
dc.date.accessioned2015-11-24T16:53:15Z-
dc.date.available2015-11-24T16:53:15Z-
dc.identifier.issn0009-8604-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/9991-
dc.rightsDefault Licence-
dc.subjectacid activationen
dc.subjectalumina-pillared montmorilloniteen
dc.subjectbleachingen
dc.subjectclayen
dc.subjectcottonseed oilen
dc.subjectclay catalystsen
dc.subjectchlorophyll adsorptionen
dc.subjectmodified electrodesen
dc.subjectsurface-acidityen
dc.subjectvegetable-oilsen
dc.subjectdesorptionen
dc.subjectmineralsen
dc.subjectpyridineen
dc.subjectpalmen
dc.titleBleaching properties of alumina-pillared acid-activated montmorilloniteen
heal.typejournalArticle-
heal.type.enJournal articleen
heal.type.elΆρθρο Περιοδικούel
heal.identifier.secondary<Go to ISI>://000165140600007-
heal.languageen-
heal.accesscampus-
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείαςel
heal.publicationDate2000-
heal.abstractThe bleaching of cottonseed oil by alumina-pillared (Al-pillared) acid-activated clays was investigated. Acid activation of a Ca-rich montmorillonite (CMS STx-1) following treatment with 1, 4, and 8 eq/L sulfuric-acid solutions, as well as subsequent pillaring with alumina, produces new materials. These materials have bleaching properties dependent upon the extent of activation of the clay prior to pillaring. The pillared acid-activated montmorillonites possessed higher bleaching efficiency compared to pillared products of the untreated clay. Mild activation of the montmorillonite matrix, pillaring with the Keggin ion [Al13O4(OH)(24)(H2O)(12)](7+), and calcination temperatures to 500 degreesC produced materials with the best fractional degree of bleaching. Direct comparison to the performance of a commercial bleaching earth (Tonsil Optimum 214, Sud-Chemie AG, Moosburg, Germany) shows that the efficiency of the Al-pillared acid-activated montmorillonite may be improved. The optimization of the bleaching process is achieved via a judicious utilization of intermediate surface area, relatively high acidity, and enhanced pore volume.en
heal.publisherThe Clay Minerals Societyen
heal.journalNameClays and Clay Mineralsen
heal.journalTypepeer reviewed-
heal.fullTextAvailabilityTRUE-
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά). ΧΗΜ

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