| Session | ||
MS-103: XAS and crystallography allied for geomaterials and environmental problems
Invited: Giuseppe Cruciani (Italy), Georgia Cametti (Switzerland) | ||
| Session Abstract | ||
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The contamination of natural resources, such as water and soil, caused by waste and disposal practices is one of the major issues that needs to be addressed to maintain the long-term sustainability of our environment. The design of strategies for the immobilization and removal of toxic materials is thus a priority, for which a better understanding of the speciation of toxic elements is necessary. Nuclear waste is a particularly important issue for many developed countries. One of the main challenges in this area is the understanding of the chemistry of long half-life radionuclides, such as U, Np, Pu, Am and Tc that are present in potentially stable nuclear waste forms. This knowledge is essential if we are to better manage and engineer safe disposal. A central challenge is the need to understand how the containers, engineered components and host rocks will modify under the cumulative radiation dose they receive from contained and escaping wastes. X-ray Absorption Spectroscopy (XAS) and X-ray Diffraction (XRD) have been widely used for the study of toxic waste in a wide range of environmental media. The high sensitivity of the spectroscopy method allows the study of samples where a highly toxic chemical species is present at very low concentration. In complementary fashion, XRD is a powerful probe for mineral structure determination particularly sensitive to heavy elements, as it is the case with most toxic species. The aim of this micro-symposium is to show the capabilities of these techniques for the development of new strategies for the management of toxic waste, highlighting their complementarity and application in the field of environmental science. To be shared by Inorganic and Mineral structures | ||
| Introduction | ||
| Presentations | ||
2:45pm - 2:50pm
Introduction to session 2:50pm - 3:20pm
Immobilization and removal of hazardous elements by geomaterials: the harder and the softer solutions University of Ferrara, Ferrara, Italy External Resource: https://www.xray.cz/iucrv/vidp.asp?id=103
3:20pm - 3:50pm
Combining X-ray diffraction, X-ray absorption spectroscopy, and molecular dynamics simulations to probe metals in zeolites: the case of intergrown Cd2+-LEV/ERI 1Bern Universität, Bern, Switzerland; 2The Rossendorf Beamline at the European Synchrotron Radiation Facility (ESRF), Avenue des Martyrs 71, 38043 Grenoble, France; 3Helmholtz Zentrum Dresden Rossendorf, Institute of Resource Ecology, Bautzner Landstrasse 400, 01328, Dresden, Germany; 4Paul Scherrer Institut, Forschungstrasse 111, 5232, Villingen PSI, Switzerland External Resource: https://www.xray.cz/iucrv/vidp.asp?id=104
3:50pm - 4:10pm
Adsorption and degradation mechanisms of perfluoroalkyl substances (PFAS) on Ag-exchanged FAU-type zeolite studied by in situ synchrotron X-ray diffraction and thermal analysis/isotope ratio mass spectrometry. 1Department of Physics and Earth Sciences, University of Ferrara, Via Saragat 1, I-44121, Ferrara, Italy.; 2Elettra-Sincrotrone Trieste S.C.p.A., Materials Characterisation By X-ray diffraction (MCX) Beamline, Strada Statale 14 - km 163,5 in AREA Science Park, Basovizza, Trieste, Italy. External Resource: https://www.xray.cz/iucrv/vidp.asp?id=105
4:10pm - 4:30pm
Revealing the lifelong bio-persistent crystal structure of an asbestos fibre 1aEuropean Synchrotron Radiation Facility, 71, Avenue Des Martyrs, Grenoble, 38040, France; 2bDepartment of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Modena, 41121, Italy; 3cDepartment of Sciences and Methods for Engineering, University of Modena and Reggio Emilia, Via Amendola, 2, Reggio Emilia, 42122, Italy; 4Pathology Unit, Azienda Unità Sanitaria Locale - IRCCS, Reggio Emilia, Italy; 5Istituto di Cristallografia, CNR, Via Amendola, 122/o, Bari, 70126, Italy External Resource: https://www.xray.cz/iucrv/vidp.asp?id=106
4:30pm - 4:50pm
Mechanisms of structural reordering during thermal transformation of aluminogermanate imogolite nanotubes 1Laboratoire de Physique des Solides, CNRS, université Paris-Saclay, Orsay, France; 2Synchrotron SOLEIL, Saint-Aubin, France External Resource: https://www.xray.cz/iucrv/vidp.asp?id=107
4:50pm - 5:10pm
Evolution of the wall-crystal interface as witness of the heterogeneous nucleation and growth of Naica’s giant crystals 1Centro de Investigación en Materiales Avanzados, Chihuahua, Mexico; 2Universidad Autónoma de Chihuahua, Chihuahua, Mexico; 3Universidad La Salle Chihuahua, Chihuahua, Mexico; 4Elettra Sincrotrone-Trieste, Basovizza, Italy; 5CONACYT-Universidad nacional Autónoma de México, Hermosillo, Mexico; 6Instituto de Ciencia de Materiales de Madrid, Madrid, Spain External Resource: https://www.xray.cz/iucrv/vidp.asp?id=108
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