Impact of City Activities and Nickel Mining Toward Heavy Metal Contaminant in the Seawater and Sediment

Kendari and Lasolo Bay which were situated in Southeast of Sulawesi. Both of Bay have been received a lot of waste originated from a variety of activities in Kendari City and Nickel mining activities in the land and in coastal area of Lasolo region. Waste contains a variety of materials contamination, one of these contaminants are heavy metals. The aim of this research is to determine the level of heavy metal contamination in seawater and sediment in Kendari and Lasolo Bay in their relation to the interests of marine organisms. Measurement of levels of heavy metals Pb, Cd, Cu, Zn and Ni in sediment in the Kendari and Lasolo Bay has been done in June 2011. Seawater and sediment samples have taken by using a Rosette water sampler and gravity cores at 10 research stations. Heavy metal levels were measured by Atomic Absorption Spectrophotometer (AAS). The results showed that the concentration of heavy metals Pb, Cd, Cu, Zn and Ni in seawater and sediments in Lasolo Bay is higher compared to Kendari Bay. This condition is believed to be attributable from the nickel mining activities in the land and coastal area of Lasolo. Generally, the concentration of those heavy metals in both of that bay still saved for marine organism