Resumen de Fraccionamiento de Fe y metales pesados en un depósito incontrolado de residuos mineros del paraje natural Estero Domingo Rubio (Huelva)
Cinta Barba Brioso, Xosé Luis Otero Pérez, Juan Carlos Fernández Caliani, Joaquín Delgado Rodríguez, Felipe Macías Vázquez, Emilio Galán Huertos
Two samples of mine wastes were selected from an abandoned deposit at the Natural Park Estero Domingo Rubio, in order to determine the fractionation and relative mobility of some heavy metals (Cd, Cu, Mn, Ni, Pb, Zn). The chemical partitioning of elements was conducted by a six-step sequential extraction scheme developed for Fe-rich materials. The results showed high pseudototal concentrations of heavy metals (up to 3249 mgL-1 Pb, 1670 mgL-1 Zn and 625 mgL-1 Cu). A large proportion of these potentially toxic metals are easily mobilisable at the present acidic and oxidant conditions, because most of them are bound to soluble and/or exchangeable phases (up to 84% Pb) and oxidisable phases (up to 91% Zn, 83% Cd and 71% Cu) of the wastes.
