@article{PAR00009516, title = {{B}enthic exchange of sedimentary metals ({C}d, {C}u, {F}e, {M}n, {N}i and {Z}n) in the {D}eule {R}iver ({N}orthern {F}rance)}, author = {{L}ourino-{C}abana, {B}. and {L}esven, {L}. and {B}illon, {G}. and {D}enis, {L}ionel and {O}uddane, {B}. and {B}oughriet, {A}.}, editor = {}, language = {{ENG}}, abstract = {{E}xperiments were performed on the {D}eule {R}iver ({N}orthern {F}rance), 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 ({C}d, {C}u, {N}i and {Z}n) and major metal ({F}e, {M}n) exchanges occurring at the water-sediment interface. {D}iffusive metal fluxes were determined from pore water metal concentration gradients measured in sediment cores. {B}enthic metal fluxes were evaluated using incubation chambers under dark conditions, and by further examining key variables ({O}-2, {CO}2, redox potential and p{H}) affecting metal release and sequestration processes. {A}s 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.}, keywords = {colloids ; diffusive flux ; overlying water ; pore water ; sediment ; trace metals}, booktitle = {}, journal = {{E}nvironmental {C}hemistry}, volume = {9}, numero = {5}, pages = {485--494}, ISSN = {1448-2517}, year = {2012}, DOI = {10.1071/en12046}, URL = {https://www.documentation.ird.fr/hor/{PAR}00009516}, }