摘要：A phytoremediation study was carried out at 5 major lakes of Bangalore to ascertainthe degree of heavy metal contamination. The study focused on assessment of heavymetal accumulation in three aquatic macrophytes used as biomonitors, in comparisonwith water and sediments (abiotic monitors) for phytoremediation. The aquatic plants(biomonitors) Hydrilla verticillata, Nelumbo nucifera, Eichhornia crassipes were analysedalong with sediments and water for Cu, Co, Pb, Zn and Ni contamination in five lakes(Aggrahara, Arakere, Naganaikanakere, Amblipura and Hulimavu). The order ofaccumulation of heavy metals was observed, in general, was Hulimavu > Ambalipura >Naganaikanakere > Arakere > Aggrahara. Based on the concentration, the toxicity statusobserved in macrophytes was H. verticillata > N. nucifera > E. crassipes. The heavymetals are arranged in the following descending order: Cu > Zn > Pb > Co > Ni inmacrophytes; Zn > Cu > Ni > Pb > Co in water and Zn > Cu > Ni > Co > Pb insediments. The selected biotic species showed maximum absorption of copper andzinc in all the lakes.
