Metal (Pb, Cd and Hg) inputs via the rivers to the Southern Marmara Sea Shelf, Turkey

Year 2007, Volume: 13 Issue: 1, 35 - 38, 01.04.2007

Erdogan Okus Nuray Balkis Edip Müftüoglu Abdullah Aksu

Abstract

Abstract A chemical study of the major river waters of Southern Marmara Sea Shelf, Turkey, was carried out on the metal distributions and sources. The distribution of metals (Pb, Cd and Hg) was measured as ‘’Total’’, dissolved and in the suspended matter. The concentrations obtained show that the high metal concentrations in the Erdek Bay waters are mainly due to the land-based natural inputs from the erosion products of mineralized zones to the bay by two rivers (Biga and Gönen). However, the relatively high metal concentrations in the Gemlik Bay waters suggested some anthropogenic (domestic industrial) inputs via the Kocasu (Susurluk) to the southern shelf. Generally dissolved metal contents are higher than in the suspended matter throughout the water column. Especially Cd contents are lower than the detection limit of the method (<0.01 µg/l) in the suspended matter except in Biga and Gönen waters.

Keywords

Key words: metal, Marmara Sea, river, atomic absorbtion spectrophotometer

References

• Algan, O., Balkis, N., Çağatay, M.N., Sarı, E. (2004). The sources of metal contents in the shelf sediments from the Marmara Sea, Turkey. Envir. Geology 46: 932-950.
• Balkıs, N. & Çağatay, M.N. (2001). Factors controlling metal distributions in the surface sediments of the Erdek Bay, Sea of
• Marmara, Turkey. Envir. International 27: 1-13. Beşiktepe, Ş., H. İ. Sur, Özsoy, E., Latif, M.A., Oğuz, T., Ünlüata, Ü. (1994). The circulation and Hydrography of the Marmara Sea.
• Progress in Oceanography 34: 285-334. Bruland, K. W., Coale, K. H., Mart, L. (1985). Analysis of seawater for dissolved cadmium, copper and lead: an inter comparison of voltametric and atomic adsorption methods. Mar. Chem. 17: 285-300.
• Bruland, K. W., Franks, R. P., Knauer, G.A., Martin, J. H., (1979).
• Sampling and analytical methods for the determination of copper, cadmium, zinc and nickel at the nanogram per liter level in seawater. Anal. Chim. Acta 105: 233-245.