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dc.creatorlotfi, sellaoui
dc.creatorHessou, Etienne Paul
dc.creatorBadawi, Michael
dc.creatorSchadeck Netto, Matias
dc.creatorDotto, Guilherme Luiz
dc.creatorOliveira Silva, Luis Felipe
dc.creatorTielens, Frederik
dc.creatorIfthikar, Jerosha
dc.creatorBonilla-Petriciolet, Adrian
dc.creatorChen, Zhuqi
dc.date.accessioned2020-12-14T21:20:25Z
dc.date.available2020-12-14T21:20:25Z
dc.date.issued2020-11-13
dc.identifier.issn1385-8947
dc.identifier.urihttps://hdl.handle.net/11323/7590
dc.description.abstractThis work evaluated the potential of a synthesized faujasite-type zeolite Y as an adsorbent for the removal of relevant heavy metals such as silver (Ag+), copper (Cu2+), and cobalt (Co2+). The adsorption data of Ag+, Cu2+, and Co2+ ions were determined experimentally at pH 6 and temperatures of 298, 308, and 318 K. Two theoretical approaches have been applied based on statistical physics modeling and density functional theory (DFT) to understand and characterize the ion exchanges involved in the removal of all metals. Results showed that this zeolite was more efficient for the adsorption of Ag+ via cation-exchange. Based on the physical modelling, the removal of heavy metals on this zeolite was mono and multi-ionic (simple and multi-interactions), where the ions interacted via one and two adsorption sites. It was also noted that the temperature increment generated more available functional groups of the zeolite, facilitating the access to the smaller cavities and the interactions with the adsorbent. Adsorption energies for removing these metals with tested zeolite were slightly endothermic and were consistent with the typical values reported for ion exchange systems of heavy metals + zeolites. DFT results demonstrated that these cationic exchange energies depend on the nature of precursor salt, but with the same ranking. Both statistical and DFT approaches agreed that exchange Ag+ in zeolite Y was easier than Cu2+ and Co2+. Overall, the application of both theoretical approaches provided a reliable interpretation of the adsorption mechanism.spa
dc.format.mimetypeapplication/pdfspa
dc.language.isoengspa
dc.publisherCorporación Universidad de la Costaspa
dc.rightsCC0 1.0 Universal*
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/*
dc.sourceChemical Engineering Journalspa
dc.subjectAdsorptionspa
dc.subjectPhysical modellingspa
dc.subjectDFT simulationspa
dc.subjectFaujasite-type zeolite Yspa
dc.subjectCationic exchangespa
dc.titleTrapping of Ag+, Cu2+, and Co2+ by faujasite zeolite Y: new interpretations of the adsorption mechanism via DFT and statistical modeling investigationspa
dc.typePreprintspa
dc.type.hasVersioninfo:eu-repo/semantics/draftspa
dc.source.urlhttps://www.sciencedirect.com/science/article/abs/pii/S1385894720338341spa
dc.rights.accessrightsinfo:eu-repo/semantics/openAccessspa
dc.identifier.doihttps://doi.org/10.1016/j.cej.2020.127712


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Except where otherwise noted, this item's license is described as CC0 1.0 Universal