Osmium isotopic tracing of atmospheric emissions from an aluminum smelter - 09/11/15
pages | 7 |
Iconographies | 4 |
Vidéos | 0 |
Autres | 0 |
Abstract |
We present for the first time the use of osmium isotopic composition as a tracer of atmospheric emissions from an aluminum smelter, where alumina (extracted from bauxite) is reduced through electrolysis into metallic aluminum using carbonaceous anodes. These anodes are consumed in the process; they are made of petroleum coke and pitch and have high Re/Os elementary ratio. Due to the relatively large geological age of their source material, their osmium shows a high content of radiogenic 187Os produced from in situ 187Re radioactive decay. The radiogenic isotopic composition (187Os/188Os∼2.5) of atmospheric particulate emissions from this smelter is different from that of other typical anthropogenic osmium sources (that come from ultramafic geological contexts with unradiogenic Os isotopes, e.g., 187Os/188Os<0.2) and also different from average eroding continental crust 187Os/188Os ratios (ca. 1.2). This study demonstrates the capacity of osmium measurements to monitor particulate matter emissions from the Al-producing industry.
Le texte complet de cet article est disponible en PDF.Keywords : Osmium, Rhenium, Aluminum smelter, Atmospheric emissions, Isotopic composition, Industrial process
Plan
Vol 347 - N° 5-6
P. 277-283 - septembre 2015 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
L’accès au texte intégral de cet article nécessite un abonnement.
Bienvenue sur EM-consulte, la référence des professionnels de santé.
L’achat d’article à l’unité est indisponible à l’heure actuelle.
Déjà abonné à cette revue ?