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Comparative Studies on Cadmium Levels in the North Sea, Norwegian Sea, Barents Sea and the Eastern Arctic Ocean

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Environmental Research and Protection

Zusammenfassung

Gelöstes und Gesamtcadmium wurden in der Nordsee, Norwegischen See, der Barentssee und dem östlichen Arktischen Ozean bestimmt. Die Untersuchungen wurden im Jahre 1975 begonnen. Spurenmetallbestimmun-gen erfolgten nach einer kontaminationsfreien, einfachen Vorbehandlung mit der differentiellen inversen Pulsvoltam-metrie an speziellen rotierenden Quecksilberfilmelektroden. Deutlich abgegrenzte Gebiete mit Schwermetallpollution konnten aufgezeigt werden. Die Küstenzonen Belgiens, der Niederlande und Deutschlands sind deutlich höher belastet als die offene Nordsee. In der offenen See fallen die Werte von Süd nach Nord, mit den geringsten Beträgen um 10 ng/kg Cd im östlichen Arktischen Ozean, ein Befund, der die anthropo-gene Pollution der Nordsee wiedergibt. In alien oben erwähnten Gebieten sind die Cd-Werte deutlich höher als im offenen Atlantik.

Es kann davon ausgegangen werden, daß die Resultate dieser Untersuchungen als zuverlässige Basis fur die Aufdek-kung von anthropogenen Veränderungen der Belastung der Nordsee innerhalb der kommenden Jahre dienen können, dies um so mehr als zuverlässige Daten bis zur Mitte der siebziger Jahre äußerst selten sind.

Summary

Dissolved and total concentrations of cadmium have been determined in the North Sea, Norwegian Sea, Barents Sea and the Eastern Arctic Ocean. The investigations started in 1975. The last sampling mission was in summer 1982. Trace metal determinations have been performed after contamination-free minimum pretreatment with differential pulse anodic stripping voltammetry (DPASV) at specially designed rotating mercury film electrodes. Distinct areas of trace metal pollution could be discovered. The coastal zones of Belgium, the Netherlands and Germany are significantly more polluted than the open ocean areas. In the open sea trace metal levels decrease from south to north, yielding the lowest results in the Eastern Arctic Ocean with about 10 ng/kg for Cd, thus reflecting anthropogenic pollution in the southern part of the North Sea. Cadmium levels in the areas mentioned above are distinctly higher than open Atlantic values.

It is implicitly to be understood that the data given in this paper can be used as a reliable basis for the detection of anthropogenic changes in the North Sea within the coming years, particularly as reliable trace metal data from the mid seventies are extremely scarce.

Awarded the prize of the Analytical Division of the Society of German Chemists

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Dedicated to Prof. Dr. W. Fresenius on the occasion of his 70th birthday

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© 1984 Springer-Verlag

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Mart, L., Nürnberg, H.W., Rützel, H. (1984). Comparative Studies on Cadmium Levels in the North Sea, Norwegian Sea, Barents Sea and the Eastern Arctic Ocean. In: Fresenius, W., Lüderwald, I. (eds) Environmental Research and Protection. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-69777-7_1

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  • DOI: https://doi.org/10.1007/978-3-642-69777-7_1

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-13469-5

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