Abstract:
This research was conducted on August 2011. Samples of seawater and
sediment were collected from Batubara coastal waters, North Sumatra and
analyzed for their Pb and Cu concentrations using AAS Perkin Elmer 3110 in
Marine Chemistry Laboratory Faculty of Fisheries and Marine Sciences Riau
University, Pekanbaru. The results showed that Pb and Cu concentrations in
seawater and sediment were higher in station closed to PT Inalum Port (0,82 mg/L
and 0,05 mg/L; 13,10 μg/g and 11,24 μg/g) for Pb and Cu in seawater and
sediment, respectively than that in other stations. The lowest heavy metal
concentration was found in station nearby mangrove area (0,42 mg/L and 0,02;
11,53 μg/g and 6,49 μg/g) for pb and cu in seawater and sediment respectively.
Concentrations of Pb and Cu in sediment of Batubara coastal waters were still
lower than ERL and ERM values which can be concluded that Batubara coastal
waters does not have negative impact to organisms living in the surrounding area.
