Table 3 shows the 10 species studied, the family they belong to, their
status, habit, sampling sites and the mean, maximum and minimum Pb
concentrations (μg g−1DW) measured in leaves. To evaluate the potential
of the plant species in phytoremediation, lead concentration in
leaves was considered in this work as the most significant variable.
Since not all species were found at all sampling sites, and as Pb soil
concentrations were variable, we consider that the most important
value to analyze, according to the aim of this work, was the maximum
one. The highest maximum Pb leaf concentration was found for Tagetes
minuta L. (396 μg g−1 DW), followed by Bidens pilosa L. (111 μg