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This study was done to recognize the capacity of C. demersum for different concentrations of lead element in lab aqueous ecosystem. The concentrations of 10, 20 and 30 ppm were used in three replications for each concentration for 30 days. The results showed that the plant can remove 30 ppm of Pb. Significant differences were found in removing capacity by plant for Pb, in all concentrations 10, 20, 30 during experiment period. There was accumulation in the stem more than the leaf. The highest removal ratio for Pb in the stem was 10.25 ppm, 9.18 ppm in the leaf and the lowest removal ratio was 8.01ppm in the concentration 30 ppm for 30 days.

Aquatic macrophytes play an important role in the structural and functional aspects of aquatic ecosystems by altering water movement regimes, providing shelter to fish and aquatic invertebrates, serving as a food source, and altering water quality by regulating oxygen balance, nutrient cycles, and accumulating heavy metals (Bradl, 2005). The ability to hyper accumulate heavy metals makes them interesting research candidates, especially for the treatment of industrial effluents and sewage waste water (Pumple et al., 2013). The use of aquatic macrophytes, such as Eichhornia Crassipes with hyper accumulating ability is known to be an environmentally friendly option to restore polluted aquatic resources. The present review highlights the phytoaccumulation potential of macrophytes with emphasis on utilization of Eichhornia Crassipes as a promising candidate for phytoremediation. The impact of uptake of heavy metals on morphology and metabolic processes of Eichhornia Crassipes has also been discussed for a better understanding and utilization of this symbiotic association in the field of phytoremediation.