Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Effect of salinity on heavy metal mobility and availability in intertidal sediments of the Scheldt estuary
Du Laing, G.; De Vos, R.; Vandecasteele, B.; Lesage, E.; Tack, F.M.G.; Verloo, M.G. (2008). Effect of salinity on heavy metal mobility and availability in intertidal sediments of the Scheldt estuary. Est., Coast. and Shelf Sci. 77(4): 589-602. dx.doi.org/10.1016/j.ecss.2007.10.017
In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714; e-ISSN 1096-0015, meer
|  |
| Author keywords |
wetlands; cadmium; intertidal environment; tidal flats; salts; metals |
| Auteurs | | Top |
- Du Laing, G.
- De Vos, R.
- Vandecasteele, B.
|
- Lesage, E.
- Tack, F.M.G.
- Verloo, M.G.
|
|
| Abstract |
The effect of the flood water salinity on the mobility of heavy metals was studied for intertidal sediments of the Scheldt estuary (Belgium). Soils and sediments of 4 sampling sites were flooded with water of different salinities (0.5, 2.5, and 5 g NaCl L-1). Metal concentrations were monitored in pore water and Surface water. To study the potential effects of flood water salinity on metal bioavailability, duckweed (Lemna minor) was grown in the surface water. The salinity was found to primarily enhance the mobility of Cd and its uptake by duckweed. Cadmium concentrations in pore water of soils and sediments and surrounding surface waters significantly exceeded sanitation thresholds and quality standards during flooding of initially oxidized sediments. Moreover, the effect was observed already at lower salinities of 0.5 g NaCl L-1. This implies that risks related to Cd uptake by organisms and Cd leaching to ground water are relevant when constructing flooding areas in the brackish zones of estuaries. These risks can be reduced by inducing sulphide precipitation because Cd is then immobilised as sulphide and its mobility becomes independent of flood water salinity. This could be achieved by permanently flooding the polluted sediments, because sulphates are sufficiently available in the river water of the brackish part of the estuary. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
