Heavy metal contamination of metal-mined soils is a widespread problem in parts of Zanjan province. The province
located in North West of Iran is highly polluted by heavy metals due to the presence, improper utilization of its
mineral resources notably Lead and Zinc, and also the development of a number of related industries. Soils are
basically polluted by Pb, Zn and Cd and their concentrations in top soils are very high exceeding European and
USEPA standards. The main objective of this study is to evaluate heavy metals concentration and bioavailable
fractions of heavy metals and accumulation of such toxic metals in native plants growing naturally on the polluted
sites. The information obtained from this study is of great value to obtain bioavailability of the toxic metals and their
potential harmful effects for plants, animals and humans