This study aims to find out a vascular plant species that accumulate relatively high concentrations of arsenic (As) for its
use as phytoremediator at abandoned and contaminated mining areas, such as São Domingos mines (Portugal). The assessment of
As contamination levels in soils and plants of other similar sites in the north of the country (Castromil and Poço de Freitas)
was also conducted; and the sample analyses were made by instrumental neutron activation analysis. Agrostis genera have shown higher As transfer coefficients than other studied plant species and, in particular, Agrostis curtisii has shown a reasonable ability to accumulate high concentration of this toxic element.