جستجوی مقالات مرتبط با کلیدواژه « soil pollution » در نشریات گروه « بیوتکنولوژی و ژنتیک گیاهی »

The soil polluted with the heavy metals is a serious problem for the ecosystem and human health. Phytoremediation is an effective and economic strategy for removing toxic metals from the soil. The present experiment was conducted in pot culture using completely randomized design with different levels of Cadmium (CdCl2.H2O) concentrations including 0, 5, 50, 100 mg kg-1 and also chromium (CrCl3) concentrations (i.e. 0, 50, 100, 150 mg kg-1) with three replications. The results indicated that an increase in Cadmium and Chrome concentrations of the soil increases the concentration of Cadmium in Lepidum Sativum shoots and Chrome concentration was reduced (P<0.01). Hence, Lepidum Sativum species is appropriate for Cadmium and Chromium absorption in phytoremediation strategy, but it is not recommended for high soil Chrome concentrations.

Today, heavy metal pollution of the biosphere has created environmental problems. Phytoremediation refers to the technique of using plants to remove pollution from the environment and to transfer them harmlessly, which becomes possible with the accumulation of heavy metals in various plant tissues and organs.In this study, 45 three-year old seedlings of Pinus sylvestris were put under the same condition at the end of March 2011, in Karaj. Using lead nitrate salt and water, different concentrations of (i.e. zero (control), 800, and 1600 mg/Kg) soluble were prepared and evenly added, in two occasions, to the soil of the seedlings at the end of June. The extracts obtained from root, stem, and leaf organs as well as the soil posts at the end of November were measured using the ICP device. Data obtained from a completely randomized design with 15 replications were analyzed using one-way ANOVA. The results indicated that P.sylvestris is a suitable species for lead phytoremediation. The accumulation of lead in root and shoot was more at the concentration of 800 ppm, whereas the highest amount of lead accumulation belonged to root and leave at the concentration of 1600 ppm. The comparison of different soil horizons demonstrated that the lead element was mostly accumulated in the surface horizon.