Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/20905
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Figueiredo, Bruno R. | pt |
dc.contributor.author | Ananias, Duarte | pt |
dc.contributor.author | Portugal, Ines | pt |
dc.contributor.author | Rocha, Joao | pt |
dc.contributor.author | Silva, Carlos M. | pt |
dc.date.accessioned | 2017-12-07T20:03:35Z | - |
dc.date.issued | 2016 | pt |
dc.identifier.issn | 1385-8947 | pt |
dc.identifier.uri | http://hdl.handle.net/10773/20905 | - |
dc.description.abstract | The ion exchange of Cs+ from aqueous solutions was studied using a novel microporous lanthanide silicate with photoluminescence properties, Tb/Eu-AV-9. This mixed lanthanide silicate was prepared by hydrothermal synthesis, characterized by scanning electron microscopy, powder X-ray diffraction, and photoluminescence spectroscopy. Batch ion exchange experiments were performed at room temperature (295 K) to measure isotherm and kinetics (removal curves). The Langmuir-Freundlich equation provided a good fit to the equilibrium data. A kinetic model based on the Maxwell-Stefan equations was implemented and adjusted to the cesium removal curves, and achieved average deviation of 8.37%. The model parameters were the diffusion coefficients, while the convective mass transfer coefficient was purely estimated. The Maxwell-Stefan diffusivities for the interaction of the counter ions Cs+ and K+ with the solid exchanger were D-AS = 8.373 x 10(-15) m(2) s(-1) and D-BS = 2.795 x 10(-14) m(2) s(-1), respectively, being consistent with other values in the literature. With respect to photoluminescence studies, the differences found between the emission spectra of native and CS+-exchanged Tb/Eu-AV-9 disclosed the potential of this sorbent for qualitative/quantitative CS+ sensing purposes. (C) 2015 Elsevier B.V. All rights reserved. | pt |
dc.language.iso | eng | pt |
dc.publisher | ELSEVIER SCIENCE SA | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F75457%2F2010/PT | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/5876/147332/PT | pt |
dc.rights | restrictedAccess | por |
dc.subject | MICROPOROUS TITANOSILICATE ETS-10 | pt |
dc.subject | EXCHANGE | pt |
dc.subject | WASTE | pt |
dc.subject | PURIFICATION | pt |
dc.subject | WASTEWATERS | pt |
dc.subject | ZEOLITE | pt |
dc.subject | SYSTEMS | pt |
dc.subject | METALS | pt |
dc.subject | WATERS | pt |
dc.subject | HG2+ | pt |
dc.title | Tb/Eu-AV-9: A lanthanide silicate for the sensing and removal of cesium ions from aqueous solutions | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
degois.publication.firstPage | 679 | pt |
degois.publication.lastPage | 688 | pt |
degois.publication.title | CHEMICAL ENGINEERING JOURNAL | pt |
degois.publication.volume | 286 | pt |
dc.date.embargo | 10000-01-01 | - |
dc.relation.publisherversion | 10.1016/j.cej.2015.10.095 | pt |
dc.identifier.doi | 10.1016/j.cej.2015.10.095 | pt |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
TbEu-AV-9 A lanthanide silicate for the sensing and removal of cesium ions from aqueous solutions_10.1016j.cej.2015.10.095.pdf | 2.33 MB | Adobe PDF |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.