Enrichment Capacity of Lead in Water by Aquatic Plants

摘要

Phytoremediation is a promising, low-cost and environmentally friendly technology. By simulating different concentrations of Pb, Pb+Zn and Pb+EDTA in aqueous solutions, taking Acorus calamus, Eichhornia crassipes and Iris tectorum as experimental material, hydroponics was used to study the enrichment of aquatic plants to Pb in water under different conditions. The results show that Eichhornia crassipes has the best bioconcentration capacity, Acorus calamus has good bioconcentration and Iris tectorum has weak bioconcentration. The bioconcentration factors (BCFs) are more than 1 and the BCFs of the underground parts are greater than that of the aboveground parts. However, the translocation factors (TFs) are less than 1. The presence of Zn enhances the enrichment of the aquatic plants to Pb. The presence of EDTA reduces the enrichment, but promotes the transfer of Pb from underground parts to aboveground parts. All of the conclusions can provide reference for the application of aquatic plants for Phytoremediation of Pb.