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Article Dans Une Revue Blue-Green Systems Année : 2024

In-depth characterization of sediment contamination in stormwater infiltration basins

Damien Tedoldi
Julien Couvidat
Mathieu Gautier
Qiufang Zhan
  • Fonction : Auteur
Thierry Winiarski
Gislain Lipeme Kouyi
Cécile Delolme
Vincent Chatain

Résumé

Abstract Managing stormwater in infiltration-based systems enables the interception of runoff suspended solids. Accumulated particles form a layer of stormwater sediments, the contamination of which presents a critical challenge for maintenance operations but is still insufficiently understood. This study therefore aims to characterize the main contamination patterns of stormwater sediments. Sediments were sampled from 18 infiltration basins encompassing a diversity of catchments. Eighty-five substances, including metals and six families of organic micropollutants, were targeted, almost all of which were consistently quantified. A significant accumulation relative to baseline levels was ascertained in all sites. The geochemical signature of stormwater sediments was relatively close to that of road dust, but different from continental and marine sediments, revealing the contribution of urban-specific sources of contaminants. Common emission and transfer dynamics were inferred from strong correlations between metals; same observations were made for alkylphenols and the group formed by polycyclic aromatic hydrocarbons, polychlorinated biphenyls, dioxins, and furans. The predominant land use was generally insufficient to explain the inter-site variability of sediment contamination, which could still be understood from an in-depth study of each catchment and the identification of site-specific emission sources. These results constitute a milestone toward stormwater sediment reuse as a resource.

Dates et versions

hal-04440355 , version 1 (05-02-2024)

Identifiants

Citer

Damien Tedoldi, Julien Couvidat, Mathieu Gautier, Qiufang Zhan, Thierry Winiarski, et al.. In-depth characterization of sediment contamination in stormwater infiltration basins. Blue-Green Systems, 2024, 6 (1), pp.1-19. ⟨10.2166/bgs.2023.039⟩. ⟨hal-04440355⟩
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