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Combined characterisation and biodegradation assessment methodology of mural pa...
Rosado, T; Gil, M; Caldeira, A Teresa; Martins, M Rosario; Dias, C; Carvalho, L; Mirão, J; Candeias, A EThe aim of this work was the material characterisation of wall paintings and biodegradation assessment, including the analysis of microbial growth and the effect of microbial proliferation, in view of their conservation. The methodology was applied to the study of frescoes dated from 1531, located in the ancient parish church of Santo Aleixo, Southern Portugal. The combined use of optical microscopy, SEM-EDS an...
Abandoned mine slags analysis by EPMA WDS x-ray mapping
Guimarães, Fernanda; Rosado, L.; Morais, C.; Candeias, A. E.; Pinto, A. P.; Mirão, J. P.The mining activity on the Iberian pyritic Belt (Portugal and Spain) started before Phoenician times, became particularly intense during the Roman occupation of the Iberian Peninsula (for gold) and after the industrial revolution (for gold, copper, zinc, lead and sulphur). The commonest ore of this region is a massive polymetalic sulphide accumulation, where pyrite (FeS2) is the main mineral, with variable conc...
Extracção sequencial em sedimentos e resíduos da antiga mina da Tinoca: geoquím...
Morais, C.; Mirão, J.; Rosado, L.; Pinto, A.P.; Lopes, M.E.; Nogueira, P.; Candeias, A.E.Mine wastes and sediments from the ancient copper mine of Tinoca (Alto Alentejo – Portugal) were submitted to a sequential extraction with the objective to establish distribution patterns for copper (Cu), iron (Fe), zinc (Zn) and lead (Pb) in different specific phases: amorphous oxides; rystalline oxides; sulphides and silicates. The results of the sequential extraction showed that Cu and Fe were pr...
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