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97 results on '"Sarti, Elena"'

22. Neutron and synchrotron characterization of Bronsted acid sites in zeolite L

Author

Beltrami, Giada, Simone, Dolabella, Rodeghero, Elisa, Cruciani, Giuseppe, Sarti, Elena, Pasti, Luisa, Emmanuelle, Suard, Carlotta, Giacobbe, and Martucci, Annalisa

Subjects
non- conventional sources, L zeolite, Bronsted, Ambientale, non- conventional sources, Bronsted, L zeolite
Published
2017

36. Removal of toxic perfluorooctanoic acid contaminant from water by adsorption on high surface area mesoporous materials

Author

Nassi, Marianna, Sarti, Elena, Pasti, Luisa, Martucci, Annalisa, Marchetti, Nicola, Cavazzani, Alberto, Di Renzo, Francesco, Galarneau, Anne, Università degli Studi di Ferrara (UniFE), Dipartimento di Chimica (DDC-UDFE-IT), Dipartimento di Scienze della Terra, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), and Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)

Subjects
[CHIM.MATE]Chemical Sciences/Material chemistry, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2014

44. Insights into Adsorption of Chlorobenzene in High Silica MFI and FAU Zeolites Gained from Chromatographic and Diffractometric Techniques.

Author

Pasti, Luisa, Rodeghero, Elisa, Beltrami, Giada, Ardit, Matteo, Sarti, Elena, Chenet, Tatiana, Stevanin, Claudia, and Martucci, Annalisa

Subjects
CHLOROBENZENE, ADSORPTION (Chemistry), ZEOLITES, CRYSTAL structure, X-ray diffraction
Abstract

In this work, the capability of two commercial high silica zeolites (HSZs), namely ZSM-5 and Y, for the removal of chlorobenzene (CB) from water was investigated by combining chromatographic and diffractometric techniques. The adsorption isotherms and kinetics of CB on ZSM-5 and Y zeolites were determined from batch tests. The adsorption kinetics were very fast; the time to reach equilibrium was less than 10 min. The equilibrium data of CB on the two HSZs showed dissimilarities that are particularly evident in the adsorption data concerning the low concentration range, where Y zeolite is characterized by low adsorption. On the contrary, at higher solution concentrations the adsorption capacity of Y is higher than that of ZSM-5. The crystalline structures of Y and ZSM-5 saturated with CB were investigated by X-ray diffraction (XRD) techniques. Rietveld refinement analyses of XRD data allowed for quantitative probing of the structural modifications of both zeolites after CB adsorption and provided insight into the preferred zeolite adsorption sites in both microporous materials. The refined framework-extraframework bond distances confirm that interactions between the selected organic contaminant and hydrophobic zeolites are mediated via co-adsorbed H2O. The occurrence of H2O -CB-framework oxygen oligomers explains variations in both the unit cell parameters and the shape of the channels, clearly confirming that water plays a very relevant role in controlling the diffusion and adsorption processes in hydrophobic zeolites. [ABSTRACT FROM AUTHOR]

Published
2018
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