Deposition of particulate organic matter (POM) induces diagenetic hot spots at the sediment-water interface (SWI). Here we explore the effects of intensive POM degradation for metal mobilization at the SWI. By using a combined planar optode-DGT (diffusive gradient in thin-films) sensor we obtained simultaneous measurements of dissolved O2 and trace metal dynamics around an aggregate of reactive organic matter placed on the SWI of a sediment mesocosm. The aggregate induced a rapid, highly localized, decrease in O2 concentration, resulting in an anoxic feature at the SWI. Co-located with this feature, we observed intense Fe and Mn mobilization, removal of Co, Ni and Zn and found evidence for the concurrent release and precipitation of Pb with...
International audienceThe early diagenesis of the major carrier phases (Fe and Mn minerals), trace e...
Vertical profiles of trace metals were measured at 1-mm intervals by deploying DGT probes in sedimen...
Trace metals and Fe and Mn were measured at vertical spatial resolutions of 2.5 and 5 mm in the top ...
Deposition of particulate organic matter (POM) induces diagenetic hot spots at the sediment-water in...
In surface sediments, metal mobility is controlled by the recruitment and turn-over of organic matte...
Spherical (~2 mm diameter) diatom (Skeletonema sp.) aggregates, representing analogues of "marine sn...
Spherical (~2 mm diameter) diatom (Skeletonema sp.) aggregates, representing analogues of “marine sn...
Contaminated sediment from a marine harbour was maintained for 16 months in two flumes that continuo...
Field data from the Belgian Continental Zone showed elevated trace metal concentrations at the sedim...
Vertical profiles of trace metals were measured at 1-mm intervals by deploying DGT probes in sedimen...
International audienceIn surface sediments, metal mobility is controlled by the recruitment and turn...
In a shallow coastal area such as the Belgian coastal waters, a quite large amount of suspended matt...
The technique of diffusion gradients in thin films (DGT) was used to measure in situ fluxes of metal...
A device has been developed for the direct in situ measurement of metal remobilization into solution...
International audienceBy using a gold amalgam (Au/Hg) voltammetric microelectrode, we have measured ...
International audienceThe early diagenesis of the major carrier phases (Fe and Mn minerals), trace e...
Vertical profiles of trace metals were measured at 1-mm intervals by deploying DGT probes in sedimen...
Trace metals and Fe and Mn were measured at vertical spatial resolutions of 2.5 and 5 mm in the top ...
Deposition of particulate organic matter (POM) induces diagenetic hot spots at the sediment-water in...
In surface sediments, metal mobility is controlled by the recruitment and turn-over of organic matte...
Spherical (~2 mm diameter) diatom (Skeletonema sp.) aggregates, representing analogues of "marine sn...
Spherical (~2 mm diameter) diatom (Skeletonema sp.) aggregates, representing analogues of “marine sn...
Contaminated sediment from a marine harbour was maintained for 16 months in two flumes that continuo...
Field data from the Belgian Continental Zone showed elevated trace metal concentrations at the sedim...
Vertical profiles of trace metals were measured at 1-mm intervals by deploying DGT probes in sedimen...
International audienceIn surface sediments, metal mobility is controlled by the recruitment and turn...
In a shallow coastal area such as the Belgian coastal waters, a quite large amount of suspended matt...
The technique of diffusion gradients in thin films (DGT) was used to measure in situ fluxes of metal...
A device has been developed for the direct in situ measurement of metal remobilization into solution...
International audienceBy using a gold amalgam (Au/Hg) voltammetric microelectrode, we have measured ...
International audienceThe early diagenesis of the major carrier phases (Fe and Mn minerals), trace e...
Vertical profiles of trace metals were measured at 1-mm intervals by deploying DGT probes in sedimen...
Trace metals and Fe and Mn were measured at vertical spatial resolutions of 2.5 and 5 mm in the top ...