چكيده لاتين :
Heavy metals are high atomic weight elements which are harmful for living organisms. The main goal of this study is the investigation of the ability of Lead biofiltration by two important species in Zagros forests {Pistacia atlantica and Quercus brantii). In this study 90 seedlings were chosen from both species. Then different concentration of Lead (Lead Nitrate (Pb N03)2): 0, 50, 250, 500, 1000, 2000 ppm was prepared as
different treatments of pollutants. This study was carried out in a factorial design on the basis of random complete design with two factors: plant species and different levels of pollutant. Time of applying pollution was the late June that 100 ml of each treatment was sprayed on seedlings three times, with seven days interval. Using Atomic Absorption, amount of gathered pollutant was measured in taken samples of leaf, stem, root and soil. The results of this research are as follows; P. atlantica and Q. brantii were classified as super absorbent plants because of absorbing a high amount of Lead pollutant. According to the average absorption of organs for August and October leaves, P. atlantica had the most leaf absorption. Although the most root absorption was related to Q. brantii. Results showed that the amount of pollutant absorption in leaves, roots and soil depends on the type of species and the concentration level of pollutants. Significant difference of quantities of lead absorption between August and October leaves begins from the application of more than 250 ppm. This might be the result of not transferring of lead from leaves to stem in the lower concentrations.
