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| Sediment accumulation rates, historical input, postdepositional mobility and retention of major elements and trace metals in salt marsh sediments of the Scheldt estuary, SW Netherlands Zwolsman, J.J.G.; Berger, G.W.; van Eck, G.Th.M. (1993). Sediment accumulation rates, historical input, postdepositional mobility and retention of major elements and trace metals in salt marsh sediments of the Scheldt estuary, SW Netherlands. Mar. Chem. 44(1): 73-94. dx.doi.org/10.1016/0304-4203(93)90007-B
In: Marine Chemistry. Elsevier: Amsterdam. ISSN 0304-4203; e-ISSN 1872-7581, meer
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| Trefwoorden |
Deposition features Mobility Trace elements Trace elements > Trace metals Water bodies > Coastal waters > Coastal landforms > Coastal inlets > Estuaries Water bodies > Inland waters > Wetlands > Marshes > Salt marshes ANE, Nederland, Westerschelde [Marine Regions] Marien/Kust; Brak water |
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| Abstract |
Rapid remobilization of trace metals occurs after their deposition on the marshes due to the occurrence of oxic conditions in the upper sediment layer, preventing precipitation of metal sulfides from the pore waters. Though the metals are partly reprecipitated in the reduced sediment layer (e.g. as sulfides), the inventory of the cores suggests that Cr is the only metal which is completely retained by the sediments. Slight losses are observed for Fe, Co, and Pb (11–14%), moderate losses for Zn, Cu, and Ni (19–25%), and high losses for P, Mn, and Cd (40–50%). Similar mobilization of trace metals is to be expected in other salt marshes if a distinct oxic sediment layer is present. |
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