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Dynamics of metallic contaminants at a basin scale — Spatial and temporal reconstruction from four sediment cores (Loire fluvial system, France)

Abstract : From the 19th century, the Loire basin (France) presents potentially pollutant activities such as mining and heavy industries. This paper shows spatio-temporal distribution of trace elements in sediments at a basin-scale, based on a comparison of archived temporal signals recorded in four sedimentary cores. Anthropogenic sources contributing to sediment contamination are also characterized, using geochemical signatures recorded in river bank sediments of the most industrialized tributaries. This study highlights upstream-downstream differences concerning recorded contamination phases in terms of spatial influence and temporality of archiving processes. Such differences were related to (i) various spatial influences of contamination sources and (ii) polluted sediments dispersion controlled by transport capacity of metal-carrier phases and hydrosedimentary dynamics.
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https://hal.archives-ouvertes.fr/hal-02377292
Contributor : Christophe Thibault <>
Submitted on : Saturday, November 23, 2019 - 2:34:57 PM
Last modification on : Wednesday, June 17, 2020 - 11:20:13 AM

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Elie Dhivert, Cécile Grosbois, Alexandra Courtin-Nomade, Xavier Bourrain, Marc Desmet. Dynamics of metallic contaminants at a basin scale — Spatial and temporal reconstruction from four sediment cores (Loire fluvial system, France). Science of the Total Environment, Elsevier, 2016, 541, pp.1504--1515. ⟨10.1016/j.scitotenv.2015.09.146⟩. ⟨hal-02377292⟩

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