| Issue |
La Houille Blanche
Number 4, Août 2007
|
|
|---|---|---|
| Page(s) | 56 - 62 | |
| Section | Qualités des eaux marines : sédiments et thermique | |
| DOI | https://doi.org/10.1051/lhb:2007047 | |
| Published online | 15 September 2007 | |
Rôle des particules sur le comportement et la spéciation de métaux traces: exemple du cadmium
The role of particles in the behavior and speciation of trace metals: the cadmium example
IFREMER, Département « Biogéochimie & Ecotoxicologie » Z. P. de Brégaillon, B.P. 330, 83507 La Seyne sur Mer, France
Auteur de correspondance : gonzalez@ifremer.fr
Abstract
The role of particles in the fate and speciation of trace metals in macrotidal estuaries was studied using a surface complexation model (MOCO). Cadmium was selected as the target metal contaminant due to its reactivity in estuaries: cadmium behavior is mainly controlled by heterogeneous processes (sorption/desorption) related to salinity and suspended matter gradients.Various scenarios of suspended matter distribution according to salinity were simulated. The impact of surface properties (specific surface area, density of surface sites, acidity instrinsic properties and complexation constant) was evaluated using data collected on particles from the Gironde, Loire and Seine estuaries.
Key words: particles / speciation / sorption/desorption / cadmium / modeling / surface properties.
© Société Hydrotechnique de France, 2007