Data/hora: 05/06/2024 03:51:53

Provedor de dados: | 5
País: | France

Título:

Spéciation des contaminants métalliques en milieu estuarien : Intérêt de la modélisation et application au cadmium

Speciation of metal contaminants in estuarine environment: lnterest of modeling and application to cadmium

Autores: | Gonzalez, Jean-louis; Dange, Catherine; Thouvenin, Benedicte.
Data: | 2001
Ano: | 2001
Palavras-chave: | Cadmium; Estuary; Speciation; Modeling; Surface complexation; Cadmium; Estuaire; Spéciation; Modélisation; Complexation de surface.
Resumo: | In estuarine environment, cadmium has a nonconservative behavior. It can be present under various species: dissolved (mineral and organic complexes), colloidal and particulate forms (adsorbed, precipitated), or integrated by various mechanisms in the organisms. This distribution is the result of processes (physical, chemical and biological) which are controlled by many factors (salinity, pH, Eh, nature and concentration of suspended matter, primary production). Geochemical modeling is a very useful approach to understand the dynamics of this type of contaminant, especially in the complex systems which are the estuaries. A speciation model was used to simulate the measurements taken (dissolved and particulate Cd) during various cruises carried out in the Seine, Loire and Gironde estuaries. The model was built starting from the knowledge obtained on the field. Experiments (in laboratory and "in situ") were necessary to check the validity of the assumptions of the model and to evaluate certain model parameters which cannot be measured directly. The results of the validation indicate that in spite of its simplifications, the model reproduces in a satisfactory way the Cd dissolved / particulate distributions measured. With a predictive aim, this type of model must be coupled with a hydrosedimentary transport model.
Tipo: | Text
Idioma: | Francês

Identificador:

https://archimer.ifremer.fr/doc/00480/59120/61749.pdf

DOI:10.1051/hydro:2001004

https://archimer.ifremer.fr/doc/00480/59120/

Editor: | EDP Sciences
Formato: | application/pdf
Fonte: | Hydroécologie Appliquée (1147-9213) (EDP Sciences), 2001 , Vol. 13 , P. 37-55

Fonte:

info:eu-repo/semantics/openAccess

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