Heavy metals concentration in oyster Crassostrea sp. HZ, sediment and sea water, Musa estuary

摘要

Heavy metals are permanent pollutantsthat are able to accumulate in the tissues of marine organisms.Toxicity and bioaccumulation of heavy metals in aquatic organisms have been considered as a critical problem. New species oyster Crassostrea sp.HZ, that live near petrochemical complex in theMusa estuary, especially may be exposed to considerable amountsof heavy metals from surrounded environment. The primary goal of this studyinvestigates the concentration of Cd, Cu, Zn and Pb in recently reported oyster Crassostrea sp.HZand its habitat in Musa estuary. Oyster, sediment and sea water samples were obtained from six selected stations. The soft tissue of oysters was separated. All of the samples were acid digested and their heavy metals level were analyzed using atomic absorption spectrometer. The concentration of Cd, Cu, Zn and Pb in soft tissues ranged 12.21-17.5, 207.2-403.52, 90.43-104.12 and 0.07-0.95 (μg/g), respectively. The concentrations of the same metals in sediment were 0.15-0.85, 1.99-141.42, 60.42-122.1 and 2-7.2 (μg/g) respectively. The concentrations of heavy metal in sea water was ND-0.7, ND-3.1, 9.12-23.03 and 0.15-2.27 (μg/g), respectively. The result showed that the level of heavy metals in soft tissue of C. sp.HZwas higher than general standard