RT Journal Article
T1 Movilidad de metales en residuos mineros y valoración del impacto ambiental del distrito minero de São Domingos (Faja Pirítica Ibérica), SW de la Península Ibérica
T1 Metal mobility in mining wastes and assessment of environmental impact of the São Domingos mining district(Iberian Pyrite Belt), SW of the Iberian Peninsula
A1 Delgado Rodríguez, Joaquín María
A1 Pérez López, Rafael
A1 Nieto Liñán, José Miguel
A1 Álvarez Valero, Antonio Miguel
A1 Sáez Ramos, Reinaldo
A1 Matos, J. X.
AB São Domingos is one of the most emblematic Portuguese mining districts in the Iberian Pyrite Belt (IPB). Thebeginning of mining exploitation in the area has been dated back to pre-Roman times, remaining in activityuntil 1966 when it was definitely halted. The intense mining labours are reflected in the presence of a hugeamount of sulphide-mining wastes and downstream production of acid mine drainage (AMD). The chemicalspeciation of potentially toxic elements (As, Cd, Cr, Cu, Fe, Mn, Pb, S, Sb and Zn) in the highly heterogeneousmine wastes from São Domingos was performed by modified BCR-sequential extraction. The oxidizablefraction is the most pollutant fraction for the environment in this type of residues. Part of this fraction isretained by precipitation of soluble secondary minerals in warm periods, moving to the bio-available fractionthat is dissolved in rainy periods. Just considering the bio-available fraction, all mine wastes from São Domingosmay leach up to 207031 tons of Fe, 14859 t of S, 6305 t of Pb, 3259 t of Zn, 1316 t of Mn, 1143 t of Cu, 219t of Cr, 163 t of As, 40 t of Sb and 1.7 t of Cd. As a function of the seasonal variation, this fraction is self-fedevery year by oxidation of the oxidizable fraction. Thus, the present study shows the pollutant potential ofthis IPB mining district and justifies the spoiled state of the fluvial courses in the region
YR 2007
FD 2007
LK http://hdl.handle.net/10272/8370
UL http://hdl.handle.net/10272/8370
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 28 may 2026