Integrated Marine Informations System - IMIS

Personen | Instituten | Publicaties | Projecten | Datasets | Kaarten
[ meld een fout in dit record ]mandje (0): toevoegen | toon Print deze pagina

Geochemical composition of sediments in the Scheldt estuary with emphasis on trace metals
Bouezmarni, M.; Wollast, R. (2005). Geochemical composition of sediments in the Scheldt estuary with emphasis on trace metals, in: Meire, P. et al. (Ed.) Ecological structures and functions in the Scheldt Estuary: from past to future. Hydrobiologia, 540(1-3): pp. 155-168
In: Meire, P.; Van Damme, S. (Ed.) (2005). Ecological structures and functions in the Scheldt Estuary: from past to future. Hydrobiologia, 540(1-3). Springer: Dordrecht. 1-278 pp., meer
Peer reviewed article  

Ook gepubliceerd als

Beschikbaar in  Auteurs 
    VLIZ: Open Repository 329500 [ OMA ]

Trefwoorden
    Major elements
    Sediments
    Trace elements > Trace metals
    Water bodies > Coastal waters > Coastal landforms > Coastal inlets > Estuaries
    België, Zeeschelde [Marine Regions]
    Marien
Author keywords
    trace metals; major elements; sediments; estuary; Scheldt

Auteurs  Top 
  • Bouezmarni, M., meer
  • Wollast, R., meer

Abstract
    Superficial sediments of the Scheldt estuary were collected with a Van Veen grab at 57 stations between Temse and Vlissingen. They were analysed for major elements (Si, Al, Fe, Ca, Mg, Na, K, Cinorg and Corg) and trace metals (Cd, Pb, Cu, Zn, Cr, Ni, Co, Mn and Li). Factor analysis indicates that 44% of the variance can be explained by one factor which exhibits a high saturation for trace metals, organic matter, Al and Fe, all variables typical of fine mud. The high scores of this first factor are almost exclusively present in the upper estuary except for one area in front of Terneuzen. The second factor, which explains 23% of the variance, is typical of the carbonates and the third one (19% of the variance) is representative of the clay minerals. These two factors are more evenly distributed over the estuary. As usual, a strong influence of granulometry on the distribution of trace elements in the sediments was observed. Intercomparison of their composition within the Scheldt or with those of other aquatic systems requires thus a normalization procedure. This problem has been studied in detail by analysing various size fractions (63–16, 16–8, 8–4, <4 µm) obtained by elutriation of the sample or by using a parameter characteristic of the fine fraction such as the concentration of a typical element (Al, Fe, Li, Corg). The normalization of trace metals allowed us to evaluate an enrichment factor of the trace elements in the estuarine deposits due to man's activities. In addition, it demonstrates the decrease of the anthropogenic impact on the composition of sediments by comparing the composition of sediments collected in 1976 and in 1994.

Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs