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Natural and anthropogenic contributions to mercury in soils and stream sediments of the upper Thur river basin (Alsace, France)

Hissler, Christophe and Remy, Sandrine and Probst, Jean-Luc Natural and anthropogenic contributions to mercury in soils and stream sediments of the upper Thur river basin (Alsace, France). (2003) Journal de Physique IV - Proceedings, vol. 1 . pp. 621-624. ISSN 1155-4339

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Official URL: http://dx.doi.org/10.1051/jp4:20030380

Abstract

In an area where human activities (mainly and soda industry) have been releasing Hg in the environnement, natural and anthropogenic contributions to heavy contents in soils and stream sediments could be assessed using mercury concentrations in the deepest soil horizons and in the stream bottom sediments located upstream from the industrial effluents. Hg concentrations have been measured by Cold Vapor Atomic Fluorescence Spectrometry. The regional natural background level coud be estimated to 0,079+0,005µg.g-1 from the Hg contents in the deepest soil horizons (Hg deriving from rock weathering) which appear to be proportioal to the organic matter percentage. Hg concentrations in stream sediments vary between 0,108+0 001 and 8,42+0,44µg.g-1. The mercury enrichment factor (EF(Hg)) that could be calculated show that anthropogenic contribution is not negligible, even in the upper part of the basin. The relashionship between organic matter percentage ang Hg content in the deepest soil horizon allows us to estimate by difference the enthropogenic contribution (18 to 86% of the total Hg content) in the uooer stream sediments. This contribution could probably be attributed to regional atmospheric deposition of Hg.

Item Type:Article
Additional Information:Thanks to EDP Sciences editor. The definitive version is available at http://publications.edpsciences.org. The original PDF of the article can be found at Journal de Physique IV website : http://jp4.journaldephysique.org/
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Institut de Recherche pour le Développement - IRD
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Other partners > Université Louis Pasteur-Strasbourg I - ULP (FRANCE)
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Deposited By: Florence Amor

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