摘要：A study was conducted for the comparative evaluation of different plants and their parts on the phytoaccumulation of heavy metals from the contaminated soil of Laloor, a major waste dump yard of Thrissur city Kerala, India. Initial content of heavy metals under study for the soil is 198.6 mg kg-1 for Pb, 11 mg kg-1 for Co, 57 mg kg-1 for Ni, 105 mg kg-1 for Cr and 0.5 mg kg-1 for Hg. A pot culture study was conducted with vetiver, marigold and sunflower plant. Upon harvest, the different plant parts were harvested, cleaned, separated and analysed for total heavy metal content using ICP OES. Results revealed that vetiver was found to be a translocator of Cr and other metals like Ni, Pb, Co and Hg were mostly stabilized in the root. Marigold translocated all the heavy metals from soil except Co, whereas sunflower behaved as phytostabiliser for Pb and translocated Co, Ni and Cr. The bioconcentration factor was higher for vetiver compared to sunflower and marigold. On the basis of removal ratio, vetiver was found to be the most efficient in the removal of heavy metals as per the order Cr>Ni>Co>Pb.
