Title :

Benthic exchanges of sedimentary metals (Cd, Cu, Fe, Mn, Ni, Pb and Zn) in Deûle River (Northern France)

Author(s) :

Lourino-Cabana, B. [Auteur]
Lesven, L. [Auteur]
Billon, G. [Auteur]
Denis, Lionel [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Ouddane, B. [Auteur]
Boughrietd, A. [Auteur]

Journal title :

Environmental Chemistry Letters

Pages :

485-494

Publisher :

Springer Verlag

Publication date :

2012-11-19

ISSN :

1610-3653

HAL domain(s) :

Planète et Univers [physics]/Sciences de la Terre/Océanographie

English abstract : [en]

Experiments were performed on the Deûle River (Northern France), which is strongly polluted by smelting plants, in the aim to investigate the influence of diagenetic processes and benthic macro-faunal activity on trace ...
Show more >Experiments were performed on the Deûle River (Northern France), which is strongly polluted by smelting plants, in the aim to investigate the influence of diagenetic processes and benthic macro-faunal activity on trace metal (Cd, Cu, Ni and Zn) and major metal (Fe, Mn) exchanges occurring at the water-sediment interface. Diffusive metal fluxes were determined from pore water metal concentration gradients measured in sediment cores. Benthic metal fluxes were evaluated using incubation chambers under dark conditions, and by further examining key variables (O2, CO2, redox potential and pH) affecting metal release and sequestration processes. As a whole, it was demonstrated that benthic fluxes were strongly dependent upon medium oxygenation and generation of colloidal iron oxides and hydroxides at the overlying water-sediment interface, raising the possibility of trace-metal adsorption and (co)precipitation.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Laboratoire d'Océanologie et de Géosciences (LOG) - UMR 8187

Source :

Harvested from HAL