The Potential of Rape(Brassica napus.L)for Phytoremediation of Pb, Cd Single Contaminated Soil by the Aid of EDTA

A pot experiment was conducted to investigate the potential of rape(Brassica napus.L) for phytoremediation of Pb、Cd single contaminated soil by the aid of EDTA.The best repairing efficiency was observed in the treatment of applying 5.0 mmol·kg-1 EDTA to the soil in this study,the total uptake amount of Pb、Cd by rape(Brassica napus.L) reached 1 542 and 64 mg·kg-1 respectively.The results showed that the application of EDTA to the soil significantly increased the uptake amount of Pb、Cd by rape(Brassica napus.L).It is indicated that,the EDTA could be regarded as a good chelate candidate for rape(Brassica napus.L) phytoextract Pb、Cd pollution,particularly for Pb in contaminated soils.