Despite the low BCF of
S. apetala, its TF for Pb,Cr and Zn was greater than or close to one,
implying an effective translocation from the roots to the aboveground biomass.Inaddition,the very high biomass of mature
S. apetala suggests that it can store huge amount of heavy metals
from sediment.Incontrast,the TF of C. malaccensis was very low in
spite of the higher BCF than S. apetala. This indicates C. malaccensis
can only stabilize and extract heavy metals from sediment.Overall,
we suggest that S. apetala has a higher phytoremediation potential
than C. malaccensis although its capability is seemingly insufficient
to purify the highly contaminated sediment