PHYTOEXTRACTION IN AN ARTIFICIAL SOIL POLLUTED WITH LEAD. THIRD EXPERIMENTAL CYCLE

This study concerns the research relating lead mobilization from artificially pollutedsoil by using EDTA ligand (ethylene diamine tetra acetic acid).Experimental research in Green House were designed to check the reproducibilityof analysed parameters on the selected plant (maize) and the conclusions of thepreliminary test laboratory experiments.The checking consisted in two experiments achievement with 2 degrees ofartificialloading soil with Pb: 1000 mg Pb/kg soil and concentration of EDTA in ratio Ligand/Leadbetween 0 and 0.5 and 2000 mg Pb / kg soil and ratio Ligand/Lead between 0 and 0.4 and three growing cycles (Cycle 1, Cycle 2 - residual effect, Cycle 3 - residual effect).The paper will present experimental results obtained in Cycle 3, remanent effect