RM - Posters
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- Enhancing Resilience of Hot Spring Ecosystems Towards a Model of Sustainable Management of SPA Territories, Driving Innovation and Energy transition [Poster]Publication . Bertin, C.; Iasio, C.; Herms, Ignasi; Arnó, Georgina; Carvalho, João; Ramalho, Elsa; Becerra, S.; Roussel, M.; Brut, E.ABSTRACT: The climate observation systems have classified 2020, 2022, 2019, 2015, and 2014 as the five hottest years in Europe over the past four decades. In the SUDOE region, 2022 was the warmest year since 1950. The projected long-term decline in precipitation in the SUDOE region may alter the natural properties of thermal springs, by changes in of shallow and deep groundwater mixing, impacting their anthropogenic ecosystem. Currently, there is no data assessing the impact of climate change, nor is there any adaptation strategy in place to anticipate its socio-economic consequences. Data on groundwater quality, climate change vulnerability, and territorial adaptive capacity are heterogeneous, exacerbating the economic divide. Migration movements and indirect impacts of climate change, as such as pandemic crises, may further intensify stress on water resources and the economy.
- From ceramics and glasses to mortars and stones: using synchrotron radiation to study cultural heritage [Poster]Publication . Veiga, JP; Silva, Teresa; Coutinho, MLABSTRACT: The use of Synchrotron Radiation to study cultural heritage, either through objects with museum interest or materials from historical monuments is no longer a novelty. Advanced nondestructive characterization techniques to understand degradation phenomena, ageing mechanisms and ancient manufacturing techniques is now a well-established trend. Profiting from the properties of synchrotron radiation and using large scale facilities such as ESRF (European Synchrotron Radiation Facility, Grenoble, France), BESSY (Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung, Berlin, Germany) and former LURE (Laboratoire pour l’Utilization du Rayonement Synchrotron, Orsay, France), it was possible to study a great diversity of materials and objects of cultural value from different ages and provenances through X-rays. Synchrotron radiation sources available at these large-scale facilities provide powerful chemical and structural characterization tools such as micro X-ray fluorescence and X-ray absorption spectroscopies (XANES and EXAFS). Different case studies will be presented regarding the variety of materials studied by a group of Portuguese researchers from the past two decades (ceramics, glasses, inorganic pigments and lithologic materials).
- Co and Cu K-edge XANES study of the glazed tiles from the Fronteira Palace (Lisbon, Portugal) [Poster]Publication . Coutinho, ML; Silva, Teresa; Figueiredo, Elin; Rolim, M.; Salas-Colera, Eduardo; Veiga, JPABSTRACT: The Fronteira Palace located in Lisbon was built during the second half of the seventeenth century. The Palace is known for its unique azulejos (Portuguese glazed tiles) dated from the 17th and 18th century which were profusely used both in the interior of the palace and on its magnificent formal gardens. The gardens have a unique cladding of high relief lustre tiles combined with blue-and-white tiles adorning the Gallery of the Kings (Figure 1). Samples of azulejos from Gallery of the Kings, were characterized in a previous work by PIXE. They display a silica alkali-lead glass or silica alkali glass and chromophores based on Co for the blue colouring and Cu for the red-lustre effect . In fact, the analyses showed that the colourless glaze has a lead-alkali silicate composition and a copper-rich lustre overlay, in agreement with the Manise lustreware production (Spain) after the XVII century. To achieve a comparison between manufacturing techniques and pigments used samples were characterized using X-Ray Absorption Spectroscopy. XANES techniques can provide information on the structural behaviour of transition metals in the vitreous matrix - namely, their bonding state and coordination environment, providing relevant information regarding the Co and Cu as chromophores.
- A XANES study of the Sn K-edge in slag by-products from tin smelting experiments [Poster]Publication . Figueiredo, Elin; Coutinho, ML; Silva, Teresa; Salas-Colera, Eduardo; Veiga, JPABSTRACT: Tin was a very important alloying element in Western Europe in the production of bronze (Cu-Sn alloy) since the second millennium BC (Bronze Age), when most metallic artefacts were made of this alloy. Smelting experiments using cassiterite collected in the NW Iberian territory were made to produce tin in a very simple and small scale manner, using a small open pit structure to reproduce what could have been the manufacturing process of tin in prehistoric times. Chemical and structural analysis of the products by XRF, SEM-EDS and XRD were made to achieve a detailed knowledge of the characteristics of the materials. Additionally, an X-ray absorption near-edge structure region (XANES) study was performed on three types of slags previously identified (Type 1, Type 2 and Type 3) to obtain information on the oxidation state of Sn. The analyses were made at the European Synchrotron Radiation Facility (ESRF) at the beamline SpLine BM 25A (5-45 keV).
- Lateritos da Guiné-Bissau : morfologia e geodiversidadePublication . Alves, Paulo; Silva, Teresa; Figueiredo, M. Ondina; Ramalhal, Fernando J. S.
- X-ray absorption near-edge spectroscopy (XANES) applied to the speciation of tungsten in Panasqueira mine debrisPublication . Figueiredo, M. Ondina; Silva, Teresa; Veiga, JP; Batista, Maria Joao; de Oliveira, Daniel Pipa Soares
- Contribuição para o conhecimento de formações lateríticas da Guiné-BissauPublication . Alves, Paulo; Silva, Teresa; Figueiredo, M. Ondina; Ramalhal, Fernando J. S.
- Tungsten-bearing molybdenite from BorralhaPublication . Silva, Teresa; Figueiredo, M. Ondina; Veiga, JP; de Oliveira, Daniel Pipa Soares; Batista, Maria Joao; Noronha, Fernando
- The recovery of scarce critical metals in environmental treatments of mining residues : rhenium in Panasqueira tungsten mine tailingsPublication . Figueiredo, M. Ondina; Silva, Teresa; Veiga, JP; Batista, Maria Joao; Salas-Colera, Eduardo; de Oliveira, Daniel Pipa Soares
- X-ray absorption spectroscopy at Re L3-edge applied to mine waste materials : a possible input to the sustainable recovery of rheniumPublication . Figueiredo, M. Ondina; Silva, Teresa; Veiga, JP; de Oliveira, Daniel Pipa Soares; Batista, Maria Joao