Assessment of Cadmium and Zinc Phytoaccumulation Prospective of Nine Prevailing Aquatic Plants
Delse P. Sebastian, B.S. Binsha, K.P. Saljuna and Satheesh George
Phytoaccumulation efficiency of common aquatic plants such as Azolla pinnata R.Br., Centella asiatica (L.) Urb., Eichornia crassipes (Mart) Solms., Hydrilla verticillata (L.F)Royle., Marsilea quadrifolia L., Nymphea pubescens Willd., Salvinia molesta D.S.Mitch., Pistia statiotes L.andVallisneria spiralis L. in removing cadmium and zinc (heavy metals) from polluted water were analysed using atomic absorption spectroscopy. Among the plants used for the study Salvinia molesta showed highest phytoaccumulation potential. Concentration of cadmium and zinc in acid dissolved dry plant materials of Salvinia molesta were 30.52 mg/g and 11.17 mg/g respectively. The result of this study showed the ability of the macrophyte Salvinia molesta in uptake and hyper accumulation of cadmium and zinc and the plant could be useful in environmental management of heavy metal pollution especially of cadmium and zinc.