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Atmospheric deposition of toxics onto the Seine Estuary, France: example of polycyclic aromatic hydrocarbons
1Laboratoire de Géologie Appliquée, UMR Sisyphe 7619, Université Pierre et Marie Curie, 4 place Jussieu, case 122, 75252 Paris cedex 05, France
2Laboratoire Hydrologie et Environnement, Ecole Pratique des Hautes Etudes, UMR Sisyphe 7619, Université Pierre et Marie Curie, 4 place Jussieu, case 122, 75252 Paris cedex 05, France
Abstract. Concentrations of Polycyclic Aromatic Hydrocarbons (PAH) were measured in precipitation samples on a weekly basis between March and October 2001, at four sites in the Seine Estuary (France). Mean concentrations of total PAHs (S 14 PAHs) ranged from 38 to 141 ng L-1. Fluoranthene, phenanthrene and pyrene were the dominant PAH compounds and were detected in each sample. The six potential carcinogenic PAHs accounted for 20 to 25% of the total PAH concentration in bulk deposition. The PAH signatures in bulk (wet and dry) deposition and surface water were also compared to investigate source/sink relationships. Seasonal patterns were observed with maximum loading occurring during the colder months of the studied period (March and April). Mean values of daily flux reported for S 14 PAHs ranged from 108 to 267 ng m-2 d-1. Spatial influences were also observed, indicating both localized and long-range atmospheric source inputs (controlled by hydroclimatic parameters).
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Citation: Motelay-Massei, A., Ollivon, D., Garban, B., and Chevreuil, M.: Atmospheric deposition of toxics onto the Seine Estuary, France: example of polycyclic aromatic hydrocarbons, Atmos. Chem. Phys. Discuss., 2, 1351-1369, 2002. Bibtex EndNote Reference Manager
