Data/hora: 13/06/2024 03:42:44

Provedor de dados: | 5
País: | France
Título: | Comportement du cadmium et du mercure lors de la diagenèse précoce et flux à l'interface eau-sédiments en zone littorale
Autores: | Gonzalez, Jean-louis.
Data: | 1992-09-11
Ano: | 1992
Palavras-chave: | Cadmium; Mercure; Eaux intrstitielles; Diagenèse précoce; Flux; Interface eaux-sédiments; Bioturbation; Modélisation; Cadmium; Mercury; Pore waters; Early diagenesis; Fluxes; Sediment-water interface; Bioturbation; Modelling.
Resumo: | The early diagenesis of Cd and Hg has been studied in different coastal areas (vasière Ouest-Gironde, Pertuis d'Antioche, baie de Marennes-Oléron). For these two metals, the fluxes at the sediment-water interface have been calculated. Considering only molecular diffusion, the diffusionnal fluxes of Cd and Hg to the colurnn water are negligible with regard to both the particular fluxes to the sediments and the inputs of the "Gironde" and "Charente" ·,estuaries. The take into account of the different processes which affect the ex changes at the interface (erosion, bioturbation) permits more realistic an estimation of the role of sediments in the geochemical cycle of Cd and Hg. The results show that up to 50% of particular Cd and Hg which are integrated into the sediments may be solubilized at the interface and it appears that the sediments of Marennes-Oléron bay are a significant source of Cd and Hg for the water column.
Tipo: | Text
Idioma: | Francês

Identificador:

http://archimer.ifremer.fr/doc/00442/55402/56920.pdf

http://archimer.ifremer.fr/doc/00442/55402/

Editor: | Université de Bordeaux
Formato: | application/pdf

Fonte:

1992 Université de Bordeaux

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