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Temporal-spatial trends in heavy metal contents in sediment-derived soils along the Sea Scheldt river (belgium) Vandecasteele, B.; De Vos, B.; Tack, F.M.G. (2003). Temporal-spatial trends in heavy metal contents in sediment-derived soils along the Sea Scheldt river (belgium). Environ. Pollut. 122(1): 7-18. http://dx.doi.org/10.1016/S0269-7491(02)00282-8 In: Environmental Pollution. Elsevier: Barking. ISSN 0269-7491; e-ISSN 1873-6424, meer

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 274067 [ download pdf ]

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Trefwoorden

Chemical elements > Metals > Heavy metals Elements > Metals > Metallic elements > Heavy metals Land types > Waste disposal sites > Land types > Landfills Samples > Geological samples > Sediment samples > Dredged samples Soil types > Soil types (lithological) > Fluvisols > Alluvial soils Soils België, Zeeschelde [Marine Regions] Marien/Kust; Brak water; Zoet water

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Auteurs		Top
Vandecasteele, B. De Vos, B. Tack, F.M.G.

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Abstract

The aim of this study was to survey the alluvial plains of the Sea Scheldt river in Belgium for the presence of old sediment-derived soils, and to appraise the heavy metal contamination at these sites. Historically, sediments of periodical dredging operations have been disposed in the alluvial plain without concern for the potential presence of contaminants. Up to 96% of the areas that were affected by sediment disposal (ca. 120 ha) was found to be polluted by at least one of the metals Cd, Cr, Zn or Pb. Concentrations of Cd, Cr and Zn were, in 10% of the cases, higher than 14, 1400 and 2200 mg/kg DM, respectively. Based on the Flemish decree on soil sanitation, Cu and Ni concentrations were of less environmental concern on any site. The pollution in the Sea Scheldt alluvial plain nevertheless is lower than for the Upper Scheldt alluvial plain. The sediment-derived soils in the most upstream part near Ghent were used for disposal of sediments from dredging operations elsewhere. Metal concentrations were explored and both spatial and temporal trend were analysed. The pollution levels encountered warrant caution as most of the soils affected by historical dredged sediment disposal are currently in use for pasture.

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