Effects of tree vegetation and waste amendments on the fractionation of Cr, Cu, Ni, Pb and Zn in polluted mine soils

► Planting pines or eucalyptus to mine areas decreased Cr and Cu contents in soils. ► Cr and Cu were mobilised from non-mobile fractions in soils vegetated with trees. ► Amending with wastes also attenuated pollution by Cr and Cu in mine soils. ► Wastes could add considerable concentrations of Ni, Pb and Zn.