Scheldt River

Cu, Zn, Ag, and Pb (which occurs mainly via wet deposition) as compared to the input by the Scheldt river (DeDeurwaerder et al. 

Sediments were mainly sampled in autumn. Two samples taken in spring showed concentrations comparable with those found for the same locations in autumn. Significant levels of 0.3—2.8 p-g g-1 dry weight (d.w.) of NPEO were found in the Dommel, a small tributary of the river Meuse, in samples taken downstream from the effluent discharge of a municipal WWTP, and in samples from the Rhine, Scheldt and Meuse rivers. Elevated levels of NP (0.5—3.8 p,g g-1) were... 

A comparison of Rhine, Meuse and Scheldt estuaries revealed that in the Rhine estuary, with its relatively short residence times of the water, concentrations on estuarine SPM were similar to or higher (ratios estuarine/freshwater >1) than those upstream (i.e. on freshwater SPM from the river), whereas in Meuse and Scheldt estuaries with longer residence times of the water, particulate matter concentrations of A9PEO are much lower (ratios < 1) than in samples taken upstream (see Fig. 6.4.3). For NP this phenomenon is also... 

Fig. 6.4.3. Ratios of estuarine relative to freshwater concentrations on SPM of A9PEO and NP observed in the Dutch rivers Scheldt, Meuse and Rhine. Ce, concentration on estuarine SPM Cf, concentration on freshwater SPM. Each value represents the ratio of the means of three samples taken at salinity 0 and three samples taken at salinity > 30%o... 

Huybrechts, T., Dewulf, J., Van Langenhove, H. (2003). State-of-the-art of gas chromatography-based methods for analysis of anthropogenic volatile organic compounds in estuarine waters, illustrated with the river Scheldt as an example. J. Chromatogr. A, 1000(1-2), 283-297. 

To illustrate one type of speciation research, i.e. the determination of the apparent complexation capacity for copper (CCqu) and the conditional stability constant (K1), examples are given for three marine areas, viz. the Scheldt estuary, the Southern Bight of the North Sea and the open north Atlantic Ocean. A hypothetical model is presented giving the complexation capacity across the land-sea boundery from river to ocean. 

Complexation Capacity (CC), conditional stability constant (K1), temperature, pH, oxygen and suspended matter content in the river Scheldt estuary at different salinities. 

Fig. 2. Means of triplicate analysis of apparent Scheldt estuary copper complexation capacity in the river Scheldt estuary at various salinities.

Van der Wielen, C. and Halleux, I. (2000) Toxicity monitoring of the Scheldt and Meuse rivers in Wallonia (Belgium) by conventional tests and microbiotests, in G. Persoone, C. Janssen and W.M. De Coen (eds.), New Microbiotests for Routine Toxicity Screening and Biomonitoring, Kluwer Academic/Plenum Publishers, New York, pp. 295-303. 

Similar hndings have been reported on a more incidental base from other areas in the world. From these, the common estuaries of the rivers Rhine/Meuse/Scheldt in Northwest Europe are relatively well studied with regard to chlorinated aromatic compounds. Breeding success of several birds species in this area (cormorant and common tern) has been shown to be related to contamination levels.106,107 Other species, however, do not show signihcantly reduced breeding success and do not seem to be at risk.108... 

Standard regions of the CPR survey are shown in Fig. la each consists of smaller rectangles rectangle Ow , located in the southeastern part of the Southern Bight of the North Sea just off The Netherlands where major rivers of the continent (Rhine, Scheldt) discharge, has received particular attention in the present study. 

Sediment samples were collected at 10 places in the river Scheldt (Belgium) during febmaiy 1988 (see... 

Table 2 illustrates the trends in the concentrations of dissolved metals from river to ocean. The Scheldt... 

Abril G, Etcheber H, Borges AV, Prankignoulle M (2000) Excess atmospheric carbon dioxide transported by rivers into the Scheldt Estuary. Compt Rend Acad Sci Ser IIA 330(ll) 761-768... 

Abril G, Etcheber H, Borges AV, Prankignoulle M (2000) Excess atmospheric carbon dioxide transported by rivers into the Scheldt Estuary. Compt Rend Acad Sci Ser IIA-Earth Planet Sci 330(ll) 761-768 Abril G, Etcheber H, Delille B, Prankignoulle M, Borges AV (2003) Carbonate dissolution in the turbid and eutrophic Loire Estuary. Mar Ecol Prog Ser 259(Sept.) 129-138... 

Valenta, H. W. Niirnberg, P. Klahre, H. Riitzel, A. G. A. Merks and S. J. Reddy, A comparative study of toxic trace metals in the estuaries of the Ooster and Wester Scheldt and of the Sierra Leone river, Mahasagar, 16 109 (1983). 

Roosens L, Dirtu AC, Goemans G, Belpaire C, Gheorgh A, Neels H, et al. Brominated flame retardants and polychlorinated biphenyls in fish from the river Scheldt, Belgium. Environ Int 2008 34(7) 976—83. 

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