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Monthly variation of trace metals in North Sea sediments. From experimental data to modeling calculations
Lourino-Cabana, B; Billon, G; Lesven, L; Sabbe, K.; Gillan, D.C.; Gao, Y.; Leermakers, M.; Baeyens, W. (2014). Monthly variation of trace metals in North Sea sediments. From experimental data to modeling calculations. Mar. Pollut. Bull. 87(1-2): 237-246. dx.doi.org/10.1016/j.marpolbul.2014.07.053
In: Marine Pollution Bulletin. Macmillan: London. ISSN 0025-326X, more
Peer reviewed article  

Available in Authors 
    VLIZ: Open Repository 279012 [ OMA ]

Keyword
    Marine
Author keywords
    Sediment; Porewater; Trace metals; Sulfides; Thermodynamic calculations;Seasonal effect

Authors  Top 
  • Lourino-Cabana, B, more
  • Billon, G
  • Lesven, L
  • Sabbe, K., more

Abstract
    Seasonal variation in trace metal contamination in surface sediments was studied through high resolution profiles assessed monthly by DGT probes in muddy sediments of the North Sea. General parameters such as pH, temperature, dissolved oxygen and sulfides were also recorded to estimate their role in the speciation of trace metals. Experimental data were included in a thermodynamic equilibrium model to calculate major (geo)chemical processes at the water-sediment interface and to predict the fate of the trace metals in case of (physico-)chemical changes. Results showed lowest Fe, Co, Ni and Cd concentrations in summer, which are most probably due to the very high sulfide concentrations according to our theoretical calculations. Cu and Pb behavior were found to be less influenced by sulfides, since they are also strongly associated to organic matter. The whole set of results clearly indicated that metal speciation in these sediments is controlled by sulfides and OM contents.

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