High-resolution profiles of trace metals in the pore waters of riverine sediment assessed by DET and DGT.
Sci Total Environ
; 362(1-3): 266-77, 2006 Jun 01.
Article
de En
| MEDLINE
| ID: mdl-16412496
ABSTRACT
The techniques of DET (diffusive equilibrium in thin films) and DGT (diffusive gradients in thin films) were applied to obtain high-resolution vertical profiles of trace metals in freshwater sediments. In the framework of the EU-Interreg project Stardust (http//www.vliz.be/projects/stardust/) between France and Belgium, in which the mobility of sediment bound metals is investigated, sediment samples were collected from the Upper Scheldt River (at Helkijn, Belgium) and the Leie River (at Warneton, located at the Belgian-French border). Intra- and inter-laboratory comparisons of the gel techniques were carried out between the two laboratories involved. In general, a good agreement was observed, taking sediment heterogeneity into account. At both stations, metal pore water profiles show more or less similar tendencies although the sediment at Warneton was more anoxic than at Helkijn. A strong correlation between Fe and Co was found at Helkijn as well as at Warneton. The metal gradients at the water/sediment interface were calculated from the high resolution profiles and the conventional, low resolution profiles. Significant differences were observed.
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Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Arsenic
/
Polluants chimiques de l'eau
/
Surveillance de l'environnement
/
Sédiments géologiques
/
Métaux lourds
Pays/Région comme sujet:
Europa
Langue:
En
Journal:
Sci Total Environ
Année:
2006
Type de document:
Article
Pays d'affiliation:
Belgique