BIO ACCUMULATION OF HEAVY METALS IN THREE FRESHWATER BIVALVE SPECIES FROM GIRNA RESERVOIR, NASIK (M.S.) NASIK (M.S.)

Abstract

The concentrations of heavy metals cadmium, zinc, copper and lead in surface water, sediments in three native freshwater bivalve species, Lamellidens marginalis, Lamellidens corrianus and Parreysia cylindrica were determined from Girna reservoir. The concentrations of all studied heavy metals were higher in the sediment than water. It was observed that the mean concentrations of lead (129.72¼g/g) was highest in Lamellidens corrianus, copper (134.27¼g/g) was highest in Lamellidens marginalis, while cadmium (24.72¼g/g) and zinc (443.26 ¼g/g) were highest in Parreysia cylindrica. The heavy metal concentrations in three species of bivalves were higher than those of the water and sediments. The bioaccumulated metal concentrations, BWAF and BSAF values indicate that Lamellidens corrianus have greater potential for lead bioaccumulation, and Lamellidens marginalis for copper, while Parreysia cylindrica have greater potential for cadmium and zinc bioaccumulation. Therefore, Lamellidens corrianus is proposed as sentinel animal for monitoring of lead and Lamellidens marginalis for copper, while Parreysia cylindrica for cadmium and zinc in freshwater reservoir