Speciation of trace metals in the Baltic Sea with focus on the Euphotic zone

• Physicochemical speciation of iron (Fe) and the trace metals Cd, Cu, Co, Mn, Ni, and Zn were performed at four different locations in surface waters of the Baltic Sea. Measurements were performed during several months of the growth season at each station to obtain a detailed picture of the temporal variation in relation to phytoplankton growth. The main target was to understand the speciation of iron, and to evaluate if Fe was limiting in primary production. A methodological aim of the thesis work was focused on comparison between trace metal speciation methods; where the DGT method was calibrated to other methods and also to use the DGT method find out which mechanisms that control the labile fraction. Other methods, such as CSV, CL-FIA and Fe isotope measurements (MC-ICP-MS) were used to further evaluate the changes in the Fe fractions.Concentrations of Mn, Zn and Cd measured by DGT during 2003 and 2004 were similar to concentrations measured in

Subject headings

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)

NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)

Keyword

Applied Geology

Tillämpad geologi

Publication and Content Type

vet (subject category)

dok (subject category)