Evaluation of heavy metal bio-availability from Almagrera pyrite-rich tailings dam (Iberian Pyrite Belt,SW Spain) based on a sequential extraction procedure |
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| Authors: | Antonio M Álvarez-Valero Reinaldo Sáez Rafael Pérez-López Joaquín Delgado José M Nieto |
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| Institution: | 1. Department of Geology, Faculty of Experimental Sciences, University of Huelva, Campus ‘El Carmen’, 21071, Huelva, Spain;2. Andalusian Institute of Earth Sciences (IACT), (CSIC- Univ. Granada), Campus Fuentenueva (Faculty of Sciences), 18002 Granada, Spain;3. Institute of Environmental Assessment and Water Research, IDÆA-CSIC Jordi Girona 18, 08034, Barcelona, Spain |
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| Abstract: | The beginning of polymetallic sulphide ore exploitation at Almagrera, Iberian Pyrite Belt, SW Spain, has been dated back to pre-Roman times; mining activity lasted until 2001 when it was definitely halted. The Almagrera sulphide tailings dam was built at the Sotiel–Coronada mine, where Cu, Zn and Pb concentrates were obtained by flotation processes, and sulphide (mainly pyrite) wastes formed. The dam was built as a water-reservoir, on a tectonic fault; its hazard is currently documented by the released wastes after a strong storm in the region, then, its stability is not monitored by the owner. |
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| Keywords: | Acid mine drainage BCR sequential extraction Dam collapse Potentially toxic elements Sulphide-mining wastes |
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