Assessment of atmospheric trace metal deposition in urban environments using direct and indirect measurement methodology and contributions from wet and dry depositions
| Autor: | Katerine Lamprea, Mehrazin Omrani, Véronique Ruban, Gwenaël Ruban |
|---|---|
| Přispěvatelé: | Eau et Environnement (IFSTTAR/GERS/EE), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Nantes Angers Le Mans (UNAM), Institut de Recherche en Sciences et Techniques de la Ville - FR 2488 (IRSTV), Université de Nantes (UN)-École Centrale de Nantes (ECN)-EC. ARCHIT. NANTES-Université d'Angers (UA)-Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS), 13M10291, ANR 2009 - Projet INOGEV - 2009 |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Pollution
Atmospheric Science 010504 meteorology & atmospheric sciences media_common.quotation_subject Drainage basin Atmospheric pollution 010501 environmental sciences ENVIRONNEMENT 01 natural sciences Rainwater harvesting [SPI]Engineering Sciences [physics] POLLUTION 11. Sustainability Trace metal 0105 earth and related environmental sciences General Environmental Science media_common geography geography.geographical_feature_category Chemistry Significant difference Deposition (aerosol physics) 13. Climate action Environmental chemistry DEPOT ATMOSPHERIQUE Urban environment |
| Zdroj: | Atmospheric Environment Atmospheric Environment, Elsevier, 2017, pp.101-111. ⟨10.1016/j.atmosenv.2017.08.064⟩ |
| ISSN: | 1352-2310 |
| DOI: | 10.1016/j.atmosenv.2017.08.064⟩ |
| Popis: | Total Atmospheric Deposition (TAD), Wet Atmospheric Deposition (WAD) and Dry Atmospheric Deposition (DAD) were all measured within an urban residential area in Nantes (France) over a 9-month period (27 February - 10 December 2014). The objective of this study was to compare 2 methods for measuring dry and wet atmospheric depositions in the urban environment, namely DAD and WAD (direct method)/TAD and WAD (indirect method). Trace metals (As, Cd, Cr, Cu, Ni, Pt and V) were used to carry out this comparison. TAD was collected with two open polyethylene containers (72×54×21cm), while WAD was collected by means of an automated rainwater collector and DAD was determined from both air measurements (recorded by an air sampler) and 7Be deposition velocities. This comparison showed a significant difference between the two methods. Dry and wet fluxes varied widely from one month to the next. Zn and Cu were the most abundant elements in both dry and wet depositions. The mean contribution of DAD to the total atmospheric deposition during this 9-month study was significant for Zn, Cu and V (about 25%) as well as for Pb (approx. 60%). For this relatively unpolluted urban residential catchment, the contribution of atmospheric deposition to global load at the catchment outlet was low, between 10% and 20% for Zn, Cu, V and Pb, 25% for Cr and about 30% for Ni. For other urban sites exhibiting high atmospheric pollution however, the atmospheric contribution to the global pollution load could be much greater. An accurate estimation of DAD thus proves critical.; Le dépôt atmosphérique total, le dépôt sec et le dépôt humide ont été mesurés dans un environnement urbain, à Nantes (France) pendant 9 mois (27 Février - 10 Décembre 2014). L'objectif de l'étude était de comparer 2 méthodes de mesure du dépôt sec et du dépôt humide. Les métaux trace (As, Cd, Cr, Cu, Ni, Pt et V) ont été utilisés pour effectuer la comparaison. Une différence significative apparaît entre les 2 méthodes. |
| Databáze: | OpenAIRE |
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