; Evaluation of Pb, Cu, Zn, and Cd Levels in some Plants at Roadsides Between Mafraq and Jerash, Jordan.

In this study, Cu, Zn, Cd and Pb concentrations were investigated in both stem and roots of three different plants which are Charlock (Sinapis arvensis), Inula (Inula salicina) and Asphodelus (Asphodelus fistulosus). The plants were collected from the roadsides between Mafraq and Jerash in Jordan. The concentrations were in ?g of heavy metal per gram of sample weight. While the average concentrations in plants stem were 0.16 ?g/g, 9.5 ?g/g, 0.51 ?g/g and 22.9 ?g/g for Cd, Cu, Pb and Zn ions, respectively, the corresponding concentrations in the plants roots were 0.09 ?g/g, 6.4 ?g/g, 0.2 ?g/g and 15.7 ?g/g for the same ions. The measured concentrations were much less than those reported by other local and international studies, therefore, the area under investigation might be considered healthy for crops culturing.