Traceurs et formes chimiques du fer dans les particules émises dans l'atmosphère depuis un site sidérurgique : Etude spectroscopique et caractérisation de composés de référence et de particules collectées dans l'environnement.

摘要

Airborne particles were collected at Dunkerque under several influences, in urban, coastal or industrial area. A physico-chemical characterization of airborne particles has been undertaken, particularly focused on particles emitted by different units of an iron and steel works located in Dunkerque industrial park. A multi-technical approach was considered, based on Scanning Electronic Microscopy equipped with an Energy Dispersive X-ray spectrometer, Electron Paramagnetic Resonance, X-Rays Diffraction and Infrared Spectroscopy. Specific characteristics for iron-containing particles emitted by each unit of the iron and steel works have been investigated in order to evidence tracers of its activity. Moreover, iron oxides and oxyhydroxides, which correspond to chemical forms generally found in the environment, were also characterized using the same techniques. These compounds are considered as references for the study of the atmospheric particles.