209
Rhenium in waste material of the sulphur factory from the S. Domingos abandoned mine (Iberian Pyrite Belt, southern Portugal): an X-ray absorption spectroscopy approach
a,bFigueiredo
M O, b,aSilva T P, a9HLJD-3bDe Oliveira D, bBatista M J
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melting point occurring in nature. The main ore
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volatile transport and deposition of the refractory
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from these metal concentrates are enriched in Re due
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5H PLQHUDO UKHQLLWH 5H6 ZDV LGHQWLÀHG DV D FRQdensate in the fumaroles of Kudriavy volcano, Kurila
Islands [2] and recently also found in the Pagoni Rachi Mo-Cu-Te-Ag-Au prospect, northern Greece [3].
The formal valence of rhenium ranges from -1 to +7
and the prevalence of the high oxidation state renders it technologically relevant in the production of
FDWDO\VWV>@'XHWRLWVXQLTXHSURSHUWLHVDFWXDODSplications of rhenium cover distinctive areas ranging
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and aerospace industries, particularly for the production of nickel-based superalloys used in jet engines.
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the abandoned S. Domingos mine [5] is of interest,
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focused on studying the binding state of rhenium in
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binding to oxygen, by comparison to rhenium oxide
model compounds after considering various formal
valences and Re coordination environments. The reVXOWVRIWKLV;$6VWXG\DUHGHVFULEHGDQGGLVFXVVHG
9th International Symposium on Environmental Geochemistry
210
Further approaches to the problematic of recovering
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References
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Geochem. 5, 317.
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47, 1013.
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>@65%DUHHWDO-3K\V&KHP
>@ 0- %DWLVWD HW DO 9,,, ,EHULDQ &RQJU *HRchem., Castelo Branco, Portugal, September 24-28.
Oral communication, Book of Abstracts, 6 pp.
Acknowledgements
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CENIMAT/ I3N, Mater. Sci. Dept., Fac. Sci. Technol., New Univ. Lisbon, 2829-516 Caparica, Portugal
NEG, Unit of Mineral Resources and Geophysics, Apartado 7586, 2610-999 Amadora, Portugal ([email protected])
9th International Symposium on Environmental Geochemistry