Heavy metals speciation analysis as a tool for studying mine tailings weathering
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文摘
A sequential extraction procedure derived from Tessier et al. (1979) was applied in the area west of Montevecchio to abandoned mine tailings which give rise to a neutralised drainage highly contaminated by heavy metals. The results were compared with mineralogical studies of the weathering processes. The proposed sequential extraction procedure confirms the general alteration modalities observed in the area through mineralogical studies: i.e., a relatively easy dissolution of Zn and Cd and strong immobilisation of Fe, Mn, Cu and Ni. The behaviour of Pb and Co is intermediate.