dc.contributor.author | Pardo, Laura | |
dc.contributor.author | Cecilia, Juan Antonio | |
dc.contributor.author | López-Moreno, Cristina | |
dc.contributor.author | Hernández, Víctor | |
dc.contributor.author | Pozo Rodríguez, Manuel | |
dc.contributor.author | Bentabol, María José | |
dc.contributor.author | Franco, Francisco | |
dc.contributor.other | UAM. Departamento de Geología y Geoquímica | es_ES |
dc.date.accessioned | 2019-05-22T08:02:55Z | |
dc.date.available | 2019-05-22T08:02:55Z | |
dc.date.issued | 2018-08-19 | |
dc.identifier.citation | Minerals 8.8 (2018): 359 | en_US |
dc.identifier.issn | 2075-163X (online) | en_US |
dc.identifier.uri | http://hdl.handle.net/10486/687579 | |
dc.description.abstract | In this work the adsorption capacities of methylene blue on Mg-smectite and sepiolite and its derived material obtained after acid treatment and/or the addition of Fe at its surfaces are studied. Natural smectite with high Mg-content in its octahedral sheet (Mg-smectite) displays higher adsorption capacity than the sepiolite due to the ability of Mg-smectite to expand the basal spacing to accommodate methylene blue cations between adjacent layers and the inability of sepiolite to adsorb these cations within the structural channels. The acid-activation of Mg-smectite causes a clear decrease in the adsorption capacity attributed to the partial loss of the interlayer positions by the loss of the octahedral sheet and subsequent formation of amorphous silica. Moreover, the adsorption of the Mg-smectite decreases even more when iron oxohydroxides species are incorporated in its interlayer spacing making inaccessible the interlayer active sites for the adsorption of methylene blue cations. On the contrary, the microwave-assisted acid treatment of sepiolite causes a slight increase in the adsorption capacity related with the dispersion of fibers. Nevertheless, contrary to that observed with Mg-smectite, higher increasing of adsorption capacities are obtained after the formation of new adsorption centers due to the incorporation of iron oxohydroxides species at the external surfaces of sepiolite | en_US |
dc.description.sponsorship | The authors are very grateful for the inestimable help of the reviewers who have significantly improved the article. The authors wish to thank the project BIA2017-82391-R for the financial support.
The preparation of this paper is included within the activities of the RNM-199 (Universidad de Málaga) and C-144 (Universidad Autónoma de Madrid, Geomaterials and Geological Processes) Research Groups | en_US |
dc.format.extent | 18 pag. | en_US |
dc.format.mimetype | application/pdf | en |
dc.language.iso | eng | en |
dc.publisher | MDPI AG | en_US |
dc.relation.ispartof | Minerals | en_US |
dc.rights | © 2018 by the authors. Licensee MDPI, Basel, Switzerland. | en_US |
dc.subject.other | Adsorption | en_US |
dc.subject.other | Bentonite | en_US |
dc.subject.other | Methylene blue | en_US |
dc.subject.other | Mg-smectite | en_US |
dc.subject.other | Sepiolite | en_US |
dc.title | Influence of the structure and experimental surfaces modifications of 2:1 clay minerals on the adsorption properties of methylene blue | en_US |
dc.type | article | en |
dc.subject.eciencia | Geología | es_ES |
dc.relation.publisherversion | https://doi.org/10.3390/min8080359 | es_ES |
dc.identifier.doi | 10.3390/min8080359 | es_ES |
dc.identifier.publicationfirstpage | 359-1 | es_ES |
dc.identifier.publicationissue | 8 | es_ES |
dc.identifier.publicationlastpage | 359-18 | es_ES |
dc.identifier.publicationvolume | 8 | es_ES |
dc.relation.projectID | Gobierno de España. BIA2017-82391-R | es_ES |
dc.type.version | info:eu-repo/semantics/publishedVersion | en |
dc.rights.cc | Reconocimiento | es_ES |
dc.rights.accessRights | openAccess | en |
dc.facultadUAM | Facultad de Ciencias | |