Spatial distribution of heavy metals in the surface soil of source-control stormwater infiltration devices - Inter-site comparison | Distribution spatiale de métaux lourds dans le sol superficiel de différents ouvrages d'infiltration des eaux pluviales - Comparaison inter-sites
Tedoldi, Damien | Chebbo, Ghassan | Pierlot, Daniel | Branchu, Philippe | Kovacs, Yves | Gromaire, Marie-Christine | Laboratoire Eau Environnement et Systèmes Urbains (LEESU) ; AgroParisTech-École nationale des ponts et chaussées (ENPC)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12) | SEPIA Conseils (entreprise) ; SEPIA Conseils | Transferts et interactions liés à l'eau en milieu construit (TEAM) ; Centre d'Etudes et d'Expertise sur les Risques, l'Environnement, la Mobilité et l'Aménagement (Cerema)
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Показать больше [+] Меньше [-]Английский. Stormwater runoff infiltration brings about some concerns regarding its potential impact on both soil and groundwater quality; besides, the fate of contaminants in source-control devices somewhat suffers from a lack of documentation. The present study was dedicated to assessing the spatial distribution of three heavy metals (copper, lead, zinc) in the surface soil of ten small-scale infiltration facilities, along with several physical parameters (soil moisture, volatile matter, variable thickness of the upper horizon). High-resolution samplings and in-situ measurements were undertaken, followed by X-ray fluorescence analyses and spatial interpolation. Highest metal accumulation was found in a relatively narrow area near the water inflow zone, from which concentrations markedly decreased with increasing distance. Maximum enrichment ratios amounted to > 20 in the most contaminated sites. Heavy metal patterns give a time-integrated vision of the non-uniform infiltration fluxes, sedimentation processes and surface flow pathways
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