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Spatial distribution of labile and total forms of copper and zinc in sediments from the Port of Gdansk

Radke B., Dembska G., Aftanas B., Kowalczyk A., Bolałek J.

Oceanological and Hydrobiological Studies

2007

Vol. 36, No.4

79-89

Sediment cores were collected from a number of sites in the Port of Gdansk in 1997 and 1998. The samples were segregated by depth then dried, homogenised and sieved into four grain size fractions (>2.00 mm, 2.00 - 0.063 mm, 0.063 - 0.032 mm, and 0.032 mm) Small-grained sand with a low admixture of silt predominated in all samples, whilst the amount of organie matter and water varied between samples. The 2.00 - 0.063 mm size fraction was the most abundant; and also showed the highest accumulation of trace metals. In the <2.00 mm size fraction the mean concentration of labile forms of copper was 9.06 mg kg"1 DW, while the concentration of total forms was 12.73 mg kg'1 DW. The mean concentrations of labile and total forms of zinc in this fraction were 31.79 and 46.27 mg kg"1 DW, respectively. The widest ranges of concentrations for both labile and total forms of the metals were found in the near-surface sediment layers (0-20 cm). Sediments collected from highly industrialized locations contained the highest concentrations of metals.

The occurrence of total and labile forms of lead and nickel in the sediments of the Port of Gdańsk

Radke B., Dembska G., Aftanas B., Bolałek J.

Oceanological and Hydrobiological Studies

2004

Vol. 33, No. 2

41--56

Sediment samples collected in 1997 and 1998 from the Wiślane, Obrońców Poczty Polskiej or Siarkowe (Sulfur), Oliwskie and Paliw Płynnych (Liquid Fuels) quays were sorted into four grain size fractions, i.e., <2.00 mm; 2.00 - 0.063 mm; 0.063 - 0.032 mm; <0.032 mm. It was determined that the sediments in the port area are small-grained sands with a small admixture of silt. The analyzed benthic sediments contained different amounts of organic matter and displayed varying water content. The mean contents of the labile form of lead and its total concentration in the grain size fraction <2.00 mm were 6.4 mg.kg –1 d.w. and 11.4 mg.kg –1 d.w., respectively. These values for nickel were 2.9 mg.kg –1 d.w. for the labile form and 7.1 mg.kg –1 d.w. for total concentration. The widest range of values was noted in the sediment surface layer (0-20 cm) for total concentration and labile forms. Sediments collected from locations close to the Gulf of Gdansk (e.g., Liquid Fuels Quay) and from areas with low industrial activity (e.g., Sulfur Quay) exhibited Pb and Ni concentrations which were many times lower than those in other areas of the port which were investigated.