STARDUST II - Spatial and Temporal Assessment
of high Resolution Depth profiles Using novel Sampling Technologies The fate of pollutants in fluvial and marine sediments in cross-border zones
Determinations of mercury in various compartments of a coastal marine ecosystem
Decadt, G.; Bogaert, M.; Goeyens, L.; Baeyens, W.F.J. (1980). Determinations of mercury in various compartments of a coastal marine ecosystem, in: Geconcerteerde Onderzoeksacties Interuniversitaire Actie Oceanologie: verslag van de studiedagen = Actions de Recherche Concertées Action Interuniversitaire Océanologie: rapports des journées d'études. pp. 59-73
In: (1980). Geconcerteerde Onderzoeksacties Interuniversitaire Actie Oceanologie: verslag van de studiedagen = Actions de Recherche Concertées Action Interuniversitaire Océanologie: rapports des journées d'études. Programmatie van het Wetenschapsbeleid: Brussel. 302 pp.
Accurate determinations of mercury in the different compartments of the ecosystem are a basic requirement for the study of its circulation. Sampling and analyzing techniques have been examined for the waterclumn, analyzing techniques for the sediments and the biological compartment. Two seawater sampling techniques (Niskin bottle and peristaltic pump) are compared; they give statistically no different results. For the preconcentration of dissolved mercury a self-synthesized resin seems to satisfy very well. In three different sediment samples mercury has been assessed after total, strong and weak attacks. The most reproductible results are obtained with HF/HNO3 (total attack) and HNO3/KMnO4 (strong attack). Several mineralisation -digestion techniques for analysis of mercury in plants have been tested. HF/HNO3, /KMnO4/ H2SO4/HNO3, and H2SO4/HNO3/V2O5, KMnO4 provided the best results.The spatial patterns of total and particulate mercury in the Belgian coastal zone confirm the earlier observed concentration gradients. In addition, the absorption capacity studies on particulate matter of the Scheldt estuary suggest that for mercury the particulate, solid phase is more important than the dissolved phase.
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STARDUST II is a project funded by the INTERREG III A programme (France/Walloon Region/Flanders
French-Flemish subprogramme) of the European Community's Regional Development Fund.
Hosted by the Flanders Marine Institute (VLIZ)
