Spatial distribution of trace elements in the soils of south-western France and identification of natural and anthropogenic sources
| Autor: | Lionel Savignan, Stéphane Faucher, Philippe Chéry, Gaëtane Lespes, Alexandra Coynel, Alexandre Lee, Stéphanie Jalabert |
|---|---|
| Přispěvatelé: | Bordeaux Sciences Agro [Gradignan], Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), Environnements et Paléoenvironnements OCéaniques (EPOC), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
geography
geography.geographical_feature_category 010504 meteorology & atmospheric sciences Bedrock Geochemistry 04 agricultural and veterinary sciences Geostatistics 15. Life on land Spatial distribution GIS 01 natural sciences Soil quality Natural (archaeology) multivariate analysis Soil water 040103 agronomy & agriculture Cation-exchange capacity 0401 agriculture forestry and fisheries Environmental science geostatistics [CHIM.OTHE]Chemical Sciences/Other Calcareous monitoring network 0105 earth and related environmental sciences Earth-Surface Processes |
| Zdroj: | CATENA CATENA, Elsevier, 2021, 205, pp.105446. ⟨10.1016/j.catena.2021.105446⟩ |
| ISSN: | 0341-8162 |
| DOI: | 10.1016/j.catena.2021.105446⟩ |
| Popis: | International audience; The contamination of soils by trace elements is a major concern for soil quality. This study is based on the analysis of 356 samples from the RMQS soil monitoring network to establish the spatial distribution and origin of six trace elements (As, Cd, Cu, Cr, Ni, Pb) in soils of south-western region of France (area of 90,293 km2). An exploratory and multivariate statistical analysis, and geostatistics combined with a geographic information system (GIS) were used to identify and characterize any concentration anomalies in trace elements. For all the trace elements studied, the exploratory analysis shows that there are more anomalies in this region than in the rest of the country. Analysis of the semivariograms shows that the six elements are spatially auto correlated. The spatial structure of As highlights anisotropic behaviour with a direction that corresponds to the gold deposit and mining activities of the region. This indicates a dual origin anthropogenic and geogenic for As. The correlation between Cd and inherent features of calcareous soil (pH, CaCO3 and cation exchange capacity) suggest a mainly geogenic origin for this element; Cd origin is confirmed by its spatial distribution associated with the Jurassic limestone bedrock. The correlations between Cr, Ni and clays highlight a geogenic origin for these elements, as weathered parent material rich in clays is also rich in Cr and Ni. The high Cu concentrations are of anthropogenic origin, linked to viticulture and the spreading of Bordeaux mixture as a fungicide. Locally high Pb concentrations are associated with mining activities and automobile emissions in large cities in the region. |
| Databáze: | OpenAIRE |
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