Results
1. Arsenic and Cd contents in each parts of the plant and growth medium
The concentrations of the metals studied in the different parts of M. umbrosum and the water are depicted in Figs. 1 and 2. As and
Cd concentrations in the plant increased significantly within-Creasing added As and Cd levels in hydroponic solution (Fig. 1a and b). The maximum accumulation of As (about 1220 mg g-1) and Cd (800 mg g-1) was found in leaves at 1000 mg L-1 treatment (Fig. 1a and b). Arsenic accumulation pattern was root< stem< leaf, and Translocations of As from contaminated water to root, root to stem and stem to leaf were significant (pstem> root for both pollutants.