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dc.contributor.authorRovira Boixaderas, Miquel
dc.contributor.authorGiménez Izquierdo, Francisco Javier
dc.contributor.authorMartínez Martínez, María del Rosario
dc.contributor.authorMartí Gregorio, Vicenç
dc.contributor.authorPablo Ribas, Joan de
dc.contributor.authorMartinez-Llado, X
dc.contributor.authorDuro, L
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.identifier.citationRovira, M. [et al.]. Sorption of selenium(IV) and selenium(VI) onto natural iron oxides: Goethite and hematite. "Journal of hazardous materials", Gener 2008, vol. 150, núm. 2, p. 279-284.
dc.description.abstractSelenium is a toxic element with a relatively high mobility in the natural waters. Iron oxy-hydroxides might play an important role in the migration of this element as well as on its removal from contaminated water. In this work we study the interaction of Se(IV), and Se(VI) with natural iron oxides hematite and goethite through two series of batch experiments at room temperature. In the first series, sorption as a function of initial selenium concentration is studied and the results have been fitted with Langmuir isotherms. In a second series of experiments, sorption is studied as a function of pH, being the main trend an increase of the sorption at acidic pH. The variation of the sorption with pH has been modelled with a triple layer surface complexation model and using the FITEQL program. The experimental data have been modelled considering for the Se(IV) the formation of the FeOSe(O)O− complex onto the hematite surface, and a mixture of FeOSe(O)O−, and FeOSe(O)OH onto the goethite surface. For Se(VI) the surface complex considered is FeOH2 +–SeO4 2− on both goethite and hematite.
dc.format.extent6 p.
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials
dc.titleSorption of selenium(IV) and selenium(VI) onto natural iron oxides: Goethite and hematite
dc.contributor.groupUniversitat Politècnica de Catalunya. SETRI - Grup de Tècniques de Separació i Tractament de Residus Industrials
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (published version)
local.citation.authorRovira, M.; Gimenez, F.; Martinez, M.; Marti, V.; Pablo, J.; Martinez-Llado, X.; Duro, L.
local.citation.publicationNameJournal of hazardous materials

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