Report: “Heavy metals Weser estuary (1985-1992)”
Description
Sediments from 7 appointment stations as well as zoobenthos (Corophium volutator, Hediste diversicolor, Oligochaeta) and vegetation samples (Phragmites australis) of 2 appointment stations in the Eulitoral of the Weser estuary have been examined twice a year for the enrichment of various heavy metals since 1985. The program began with the analysis of Pb, Cd, Cr, Cu, Ni, Hg and Zn. Since 1987, the concentrations of Fe, Mn, Ti and V have also been determined. The investigations are part of the monitoring of waste water discharges from titanium dioxide production at a plant near Nordenham and are based on “EC Directive 82/883/EEC on the details of monitoring and control of environmental media affected by discharges from titanium oxide production”. The concentrations of heavy metals were biannually determined in the intertidal sediments, Macrozoobenthos (Corophium volutator, Hediste diversicolor, Oligochaeta) and vegetation (Phragmites australis) form the Weser estuary during 1985-1992. The programme started with the analysing of Pb, Cd, Cr, Cu, Ni, Hg, and Zn. From 1987 on the concentrations of Fe, Mn, Ti, and V were additionally determined. The assessments are part of the surveys of the impact of the outfall from a titanium dioxide plant on the estuarine environment. They base on the Council directive 82/883/EEC December 1982. The results are discussed in reference to the geochemical background (sediment) and data from recent literature.
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Tags
- makrozoobenthos-schwermetalle-zoobenthos-vegetation-nlwkn-eulitoral-titanoxid-tio2
- wesermündung-weser-lunewatt