| Issue |
E3S Web Conf.
Volume 98, 2019
16th International Symposium on Water-Rock Interaction (WRI-16) and 13th International Symposium on Applied Isotope Geochemistry (1st IAGC International Conference)
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|
|---|---|---|
| Article Number | 06003 | |
| Number of page(s) | 5 | |
| Section | Geochemical Cycles of Elements and Global Environmental Changes | |
| DOI | https://doi.org/10.1051/e3sconf/20199806003 | |
| Published online | 07 June 2019 | |
Evaluation of REE potential in Portuguese legacy mines
1
C2TN. Campus Tecnológico e Nuclear. Instituto Superior Técnico, Universidade de Lisboa. Estrada Nacional 10 (Km 139,7), 2695-066 Bobadela, Loures, Portugal
2
EDM, R. Sampaio e Pina, 1 – 7.º, 1070-248, Lisboa, Portugal
3
Faculdade de Ciências, Universidade de Lisboa, IDL – Instituto Dom Luiz, Ed. C6, Campo Grande, 1749-016 Lisboa, Portugal
* Corresponding author: isadias@ctn.tecnico.ulisboa.pt
REE have unique properties that are mostly used to manufacture high tech devices. Most REE have geochemical properties that cause them to be typically dispersed and not often found in concentrated and economically exploitable forms, and difficult to separate. The ENVIREE project aims to develop environmentally friendly and efficient methods for their extraction from secondary sources. REE contents of tailings from four legacy mining sites have been obtained by INAA and analysed by 57Fe Mössbauer spectroscopy. REE concentrations in the tailings of Covas and Cumieira are more dependent on the REE contents of the primary ores and the treatment to extract the target metals than on the nano-sized oxides present. The tailings’ size, REE contents and Mössbauer results support the selection of the Covas tailing as the one to be submitted for further steps of REE extraction on the framework of the project.
© The Authors, published by EDP Sciences, 2019
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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