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dc.contributor.author
Fellenz, Nicolás Antonio
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dc.contributor.author
Martin, Pedro Pablo
dc.contributor.author
Marchetti, Sergio Gustavo
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dc.contributor.author
Bengoa, Jose Fernando
dc.date.available
2016-04-29T13:43:04Z
dc.date.issued
2015-03-19
dc.identifier.citation
Fellenz, Nicolás Antonio; Martin, Pedro Pablo; Marchetti, Sergio Gustavo; Bengoa, Jose Fernando; Aminopropyl-modified mesoporous silica nanospheres for the adsorption of Cr(VI) from water; Springer; Journal of Porous Materials; 22; 3; 19-3-2015; 729-738
dc.identifier.issn
1380-2224
dc.identifier.uri
http://hdl.handle.net/11336/5445
dc.description.abstract
Aminopropyl-functionalized mesoporous silica spherical particles were obtained through post-synthetic route. The suitability of this material as an adsorbent for heavy metals from aqueous media was tested by Cr(VI) adsorption experiments performed at various pH conditions, chromium concentrations and time. The synthesized particles were characterized before and after functionalization by X-ray diffraction at low angles,nitrogen adsorption?desorption isotherms, infrared Fourier transform spectroscopy, scanning electron microscopy and thermogravimetric analysis. It was found that Cr(VI) adsorption occurs more efficiently in the pH range between 2 and 3. As a consequence of the nanometer scale of the particles, concentration profiles do not develop inside of them and thus there are no diffusional restrictions within the pores, leading to a higher Cr(VI) adsorption than that previously reported for similar systems. Chromium desorption for material reutilization was carried out in basic media. Results showed that the amino groups were grafted successfully without mesostructure damage. These groups are essential for the metal ion removal and no significant leaching was observed after fouruse/regeneration/use cycles. The batch equilibrium data fitted well the Langmuir isotherm with a maximum adsorption capacity of 87.1 mg/g at 25ºC. A discussion about the relationship between structure and its behavior as adsorbent, including regeneration and reusability, is given.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Ordered Mesoporous Silica
dc.subject
Spherical Particles
dc.subject
Adsorption
dc.subject
Hexavalent Crhomium
dc.subject.classification
Nano-materiales
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dc.subject.classification
Nanotecnología
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Aminopropyl-modified mesoporous silica nanospheres for the adsorption of Cr(VI) from water
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-05-06 15:52:43.262787-03
dc.identifier.eissn
1573-4854
dc.journal.volume
22
dc.journal.number
3
dc.journal.pagination
729-738
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
New York
dc.conicet.avisoEditorial
The link must be accompanied by the following text: "The final publication is available at link.springer.com”
dc.description.fil
Fil: Fellenz, Nicolás Antonio. Universidad Nacional de Rio Negro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte; Argentina
dc.description.fil
Fil: Martin, Pedro Pablo. Universidad Nacional de Rio Negro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte; Argentina
dc.description.fil
Fil: Marchetti, Sergio Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
dc.description.fil
Fil: Bengoa, Jose Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
dc.journal.title
Journal of Porous Materials
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007%2Fs10934-015-9946-4
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s10934-015-9946-4
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/10.1007/s10934-015-9946-4
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