Over het archief
Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.
Dit archief wordt uitgebouwd en beheerd volgens de principes van de Open Access Movement, en het daaruit ontstane Open Archives Initiative.
Basisinformatie over ‘Open Access to scholarly information'.
| one publication added to basket [120067] |
Transport and transformation of trace metals in the Scheldt estuary
In: Marine Chemistry. Elsevier: Amsterdam. ISSN 0304-4203; e-ISSN 1872-7581, meer
|  |
| Trefwoorden |
Trace elements > Trace metals
Brak water; Zoet water |
| Author keywords |
trace metals; estuary; biogeochemistry; distribution coefficient |
| Abstract |
Water samples collected along the Scheldt estuary during several cruises were analysed for fundamental physico-chemical parameters and for dissolved and particulate trace metals (Cd, Co, Cr, Cu, Mn, Ni, Ph and Zn). Mean suspended matter concentration and upstream dissolved concentrations of Ni, Cr and Mn are increasing with river discharge, suggesting a resuspension of fluid mud and release of dissolved elements from interstitial waters. Dissolved and particulate Ni and Cr behave conservatively during estuarine mixing, while Mn is removed from the dissolved phase and Cd, Cu and Zn are on the contrary mobilized. The distribution coefficients, KD's, show at low salinities the following sequence Cd > Cu > Zn > Ni. The KD's of Cd, Cu and Zn are well correlated with dissolved oxygen content suggesting a redissolution of sulphide produced in the anoxic part of the estuary. The analysis of suspended matter in the upper Scheldt confirms the high contamination of this estuary for Cd, Cr, Cu, Pb and Zn. The long residence time of the water in the estuary, due to its small river discharge and large tidal influence and the important variations of the river input make it difficult to estimate metal fluxes to the North Sea, without the use of an elaborated coupled hydrodynamical/biogeochemical model. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
