Ammonia removal using activated carbons: effect of the surface chemistry in dry and moist conditions

Please use this identifier to cite or link to this item: http://hdl.handle.net/10045/22587
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dc.contributorMateriales Avanzadoses
dc.contributor.authorGonçalves, Maraisa-
dc.contributor.authorSánchez García, Laura-
dc.contributor.authorJardim, Erika de Oliveira-
dc.contributor.authorSilvestre-Albero, Joaquín-
dc.contributor.authorRodríguez Reinoso, Francisco-
dc.contributor.otherUniversidad de Alicante. Departamento de Química Inorgánicaes
dc.contributor.otherUniversidad de Alicante. Instituto Universitario de Materialeses
dc.date.accessioned2012-05-28T09:24:35Z-
dc.date.available2012-05-28T09:24:35Z-
dc.date.issued2011-11-03-
dc.identifier.citationGONÇALVES, Maraisa, et al. “Ammonia removal using activated carbons: effect of the surface chemistry in dry and moist conditions”. Environmental Science &Technology. Vol. 45, No. 24 (2011). ISSN 0013-936X, pp. 10605-10610es
dc.identifier.issn0013-936X (Print)-
dc.identifier.issn1520-5851 (Online)-
dc.identifier.urihttp://hdl.handle.net/10045/22587-
dc.description.abstractThe effect of surface chemistry (nature and amount of oxygen groups) in the removal of ammonia was studied using a modified resin-based activated carbon. NH3 breakthrough column experiments show that the modification of the original activated carbon with nitric acid, that is, the incorporation of oxygen surface groups, highly improves the adsorption behavior at room temperature. Apparently, there is a linear relationship between the total adsorption capacity and the amount of the more acidic and less stable oxygen surface groups. Similar experiments using moist air clearly show that the effect of humidity highly depends on the surface chemistry of the carbon used. Moisture highly improves the adsorption behavior for samples with a low concentration of oxygen functionalities, probably due to the preferential adsorption of ammonia via dissolution into water. On the contrary, moisture exhibits a small effect on samples with a rich surface chemistry due to the preferential adsorption pathway via Brønsted and Lewis acid centers from the carbon surface. FTIR analyses of the exhausted oxidized samples confirm both the formation of NH4+ species interacting with the Brønsted acid sites, together with the presence of NH3 species coordinated, through the lone pair electron, to Lewis acid sites on the graphene layers.es
dc.description.sponsorshipFinancial support from MEC(projectMAT2007- 61734 FEDER) and Generalitat Valenciana (PROMETEO/2009/002). The European Commission is also acknowledged (project FRESP CA, contract 218138). J.S.-A. acknowledges support from MEC, GV, and UA (RyC2137/06).es
dc.languageenges
dc.publisherAmerican Chemical Societyes
dc.rightsCopyright © 2011 American Chemical Societyes
dc.subjectActivated carbonses
dc.subjectAmmonia removales
dc.subjectSurface chemistryes
dc.subject.otherQuímica Inorgánicaes
dc.titleAmmonia removal using activated carbons: effect of the surface chemistry in dry and moist conditionses
dc.typeinfo:eu-repo/semantics/articlees
dc.peerreviewedsies
dc.identifier.doi10.1021/es203093v-
dc.relation.publisherversionhttp://dx.doi.org/10.1021/es203093ves
dc.rights.accessRightsinfo:eu-repo/semantics/restrictedAccesses
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/FP7/218138es
Appears in Collections:Research funded by the EU
INV - LMA - Artículos de Revistas
INV - NANOMOL - Artículos de Revistas

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