The dominating amounts ofHMsaccumulated in the aerial parts
of plants were favorable to shift out metals from soils by harvesting
aboveground parts and appropriate treatments and to reach the
aim of ecological remediation of contaminated soils [2,18,50]. The
total amount of Cd accumulation by T. patula was in the sequence
shoot > leaf > stem > root, and 86.3–90.6% of Cd uptake by the plants
was concentrated in shoots. As for Cu and Pb, the metal accumulation
in roots was higher than that in shoots under the joint
stress of B[a]P5Cu500 and B[a]P–Pb (Fig. 3). Apparently, T. patula
has higher capability to phytoextract Cd than Cu and Pb and
could be useful for remediation of Cd even at co-contamination
of B[a]P–Cd