Trace elements temporal variability

Table 16.2 Temporal variability of trace element concentration for the major tributaries and comparison with previous studies. 

Temporal variability of dissolved trace elements at Obidos... 

Very few studies have dealt with the temporal variations of trace metals in the large rivers (Shiller and Boyle 1987b, Seyler and Elbaz-Poulichet 1996). The trace metal variability of the Amazon River is of interest for various reasons, including (1) the river s importance as a major source of dissolved and particulate substances to the Atlantic ocean, (2) as a case study for furthering the understanding of trace element geochemistry in a major fluvial system, and (3) as an evaluation of the potential contamination of the river waters. 

Seyler, P., and F. Elbaz-Poulichet. 1996. "Biogeochemical control on the temporal variablity of the trace element concentrations in the Oubangui River (Centrai African Republic)." Journal of Hydrology 180 319-332. 

Seyler, R, J. L. Guyot, F. Elbaz-Poulichet, N. Filizola, G. Boaventura. 1998. "Hydroiogical control on the temporal variability of trace element concentrations in the Amazon River," Minetalogical Magazine, Goldsmith Conference, Toulouse, August 31-September 2,... 

South America. Due to its importance in terms of water discharge and to generally high trace-element levels, the Amazon river system has been well documented for a number of elements, including their seasonal variations. In Table 1, we have reported different analyses of the Amazon River and its major tributaries to show their temporal variability at a given location. Results of ultrafiltration experiments for the Amazon and Orinoco rivers demonstrate that the concentration of a number of elements in waters depends on filtration pore size. Finally, data for... 

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