caa a22 4500 467885699 CHVBK 20180406152733.0 cr unu---uuuuu 170328e20060601xx s 000 0 eng 10.1007/s10021-006-0151-9 doi (NATIONALLICENCE)springer-10.1007/s10021-006-0151-9 Assessing Nitrification and Denitrification in the Seine River and Estuary Using Chemical and Isotopic Techniques [Elektronische Daten] [Mathieu Sebilo, Gilles Billen, Bernhard Mayer, Daniel Billiou, Micheline Grably, Josette Garnier, André Mariotti] Downstream from metropolitan Paris (France), a large amount of ammonium is discharged into the Seine River by the effluents of the wastewater treatment plant at Achères. To assess the extent of nitrification and denitrification in the water column, concentrations and isotopic compositions of ammonium (δ15N-NH4+) and nitrate (δ15N-NO3−, δ18O-NO3−) were measured during summer low-flow conditions along the lower Seine and its estuary. The results indicated that most of the ammonium released from the wastewater treatment plant is nitrified in the lower Seine River and its upper estuary, but there was no evidence for water-column denitrification. In the lower part of the estuary, however, concentration and isotopic data for nitrate were not consistent with simple mixing between riverine and marine nitrate. A significant departure of the nitrate isotopic composition from what would be expected from simple mixing of freshwater and marine nitrates suggested coupled nitrification and denitrification in the water, in spite of the apparent conservative behavior of nitrate. Denitrification rates of approximately 0.02 mg N/L/h were estimated for this part of the estuary. Springer Science+Business Media, Inc., 2006 denitrification nationallicence nitrification nationallicence Seine River nationallicence wastewater treatment nationallicence 15N/14N, 18O/16O nationallicence Sebilo Mathieu UMR Bioemco, Université Pierre et Marie Curie, BoÎte 120, Tour 56/66, 4éme étage, 75252, Paris cedex 05, France aut Billen Gilles UMR Sisyphe, Université Pierre et Marie Curie, BoÎte 123, Tour 56/46 4éme étage, 75252, Paris Cedex 05, France aut Mayer Bernhard Department of Geology and Geophysics, University of Calgary, 2500 University Drive NW, T2N 1N4, Calgary, Alberta, Canada aut Billiou Daniel UMR Bioemco, Université Pierre et Marie Curie, BoÎte 120, Tour 56/66, 4éme étage, 75252, Paris cedex 05, France aut Grably Micheline UMR Bioemco, Université Pierre et Marie Curie, BoÎte 120, Tour 56/66, 4éme étage, 75252, Paris cedex 05, France aut Garnier Josette UMR Sisyphe, Université Pierre et Marie Curie, BoÎte 123, Tour 56/46 4éme étage, 75252, Paris Cedex 05, France aut Mariotti André UMR Bioemco, Université Pierre et Marie Curie, BoÎte 120, Tour 56/66, 4éme étage, 75252, Paris cedex 05, France aut Ecosystems Springer-Verlag; www.springer-ny.com 9/4(2006-06-01), 564-577 1432-9840 9:4<564 2006 9 10021 https://doi.org/10.1007/s10021-006-0151-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10021-006-0151-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sebilo Mathieu UMR Bioemco, Université Pierre et Marie Curie, BoÎte 120, Tour 56/66, 4éme étage, 75252, Paris cedex 05, France aut NATIONALLICENCE 700 1- Billen Gilles UMR Sisyphe, Université Pierre et Marie Curie, BoÎte 123, Tour 56/46 4éme étage, 75252, Paris Cedex 05, France aut NATIONALLICENCE 700 1- Mayer Bernhard Department of Geology and Geophysics, University of Calgary, 2500 University Drive NW, T2N 1N4, Calgary, Alberta, Canada aut NATIONALLICENCE 700 1- Billiou Daniel UMR Bioemco, Université Pierre et Marie Curie, BoÎte 120, Tour 56/66, 4éme étage, 75252, Paris cedex 05, France aut NATIONALLICENCE 700 1- Grably Micheline UMR Bioemco, Université Pierre et Marie Curie, BoÎte 120, Tour 56/66, 4éme étage, 75252, Paris cedex 05, France aut NATIONALLICENCE 700 1- Garnier Josette UMR Sisyphe, Université Pierre et Marie Curie, BoÎte 123, Tour 56/46 4éme étage, 75252, Paris Cedex 05, France aut NATIONALLICENCE 700 1- Mariotti André UMR Bioemco, Université Pierre et Marie Curie, BoÎte 120, Tour 56/66, 4éme étage, 75252, Paris cedex 05, France aut NATIONALLICENCE 773 0- Ecosystems Springer-Verlag; www.springer-ny.com 9/4(2006-06-01), 564-577 1432-9840 9:4<564 2006 9 10021 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer