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Caractérisation et quantification des Eléments Traces Métalliques dans les dépôts et les particules atmosphériques de la vallée d'Aspe - Mise en place d'indicateurs de la Qualité de l'Air.

Abstract : This study of inputs of trace metal elements (TME) in the Aspe valley (Pyrénées Atlantiques) has two objectives: (1) to define a reference state of metallic contaminants for the monitoring of road traffic emissions since the opening of the Somport tunnel and, (2) to evaluate sources and climatic conditions which contribute to TME inputs in the Aspe valley. To establish air quality indicators, TME (Al, Na, Mg, K, V, Mn, Cr, Zn, Cu, Rb, Cd, Sn, Sb, Ba, Ce, Pb and U) and lead isotopic ratios (208Pb/206Pb, 206Pb/207Pb and 208Pb/207Pb) were determined in the atmospheric receptors (fresh snow, wet deposition, atmospheric particulates and lichen). Sampling and analyses with ultra clean procedures were employed for TME quantification. Variability of atmospheric receptors studied, allows integration on a daily and pluriannual temporal scale and a spatial scale in the North-South axis of the valley and as a function of the altitude from the road.
The Aspe valley presents a level of contamination characteristic of remote European areas and the metallic contaminants identified are Cd, Sb, Zn, Cu, Pb and Sn. In the low valley, air quality indicators indicate contaminant contributions (i) from local emissions of domestic heat sources, from agricultural burning practices and road traffic, and (ii) from regional anthropogenic sources of waste incinerators, metallurgic industries and urban centres. In altitude, the valley is significantly influenced by wind erosion and long range transport of TME in the Northern Hemisphere. Characterisation of TME and the isotopic ratios of Pb in the Somport tunnel indicate (i) a significant emission of Cu, Sb, Zn and Ba and (ii) an isotopic composition from a slightly radiogenic source even though Pb concentrations indicate low emissions from road traffic emissions. Nevertheless, the low traffic volume in the Aspe valley prevents conclusive evidence of significant contamination from road traffic.
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https://tel.archives-ouvertes.fr/tel-00118082
Contributor : Sophie Veschambre <>
Submitted on : Monday, December 4, 2006 - 11:10:42 AM
Last modification on : Friday, January 15, 2021 - 9:23:30 AM
Long-term archiving on: : Tuesday, April 6, 2010 - 11:48:19 PM

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  • HAL Id : tel-00118082, version 1

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Sophie Veschambre. Caractérisation et quantification des Eléments Traces Métalliques dans les dépôts et les particules atmosphériques de la vallée d'Aspe - Mise en place d'indicateurs de la Qualité de l'Air.. Matériaux. Université de Pau et des Pays de l'Adour, 2006. Français. ⟨tel-00118082⟩

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