Heavy metals distribution and accumulation characteristics of 16 species plants on ecological floating-bed

Abstract

Distribution and accumulation characteristics of copper (Cu), zinc (Zn), mercury (Hg), and lead (Pb) in the aerial and underground parts of 16 species of plants on ecological floating-bed were studied in the present study, and they showed significant differences. Most translocation factors for Cu, Zn, Hg, and Pb were smaller than 1. Coleus blumei had a considerable absorption and accumulation effect on Zn, Hg, and Pb; Hylotelephium erythrostictum had a good absorption and accumulation effect on Zn and Hg. Arundo donax var. versicolor, Lythrum salicaria, and Iris pseudacorus which had remarkable absolute accumulation in the aerial part due to their massive biomass, and were expected to have a promising prospect in applying floating-bed technology.