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Nitrogen isotope effects can be used to diagnose N transformations in wastewater anammox systems.
Magyar, Paul M; Hausherr, Damian; Niederdorfer, Robert; Stöcklin, Nicolas; Wei, Jing; Mohn, Joachim; Bürgmann, Helmut; Joss, Adriano; Lehmann, Moritz F.
Afiliación
  • Magyar PM; Aquatic and Isotope Biogeochemistry, Department of Environmental Sciences, University of Basel, Basel, 4056, Switzerland. paul.magyar@unibas.ch.
  • Hausherr D; Eawag, Swiss Federal Institute for Aquatic Science and Technology, Dübendorf, 8600, Switzerland.
  • Niederdorfer R; Eawag, Swiss Federal Institute for Aquatic Science and Technology, Kastanienbaum, 6047, Switzerland.
  • Stöcklin N; Aquatic and Isotope Biogeochemistry, Department of Environmental Sciences, University of Basel, Basel, 4056, Switzerland.
  • Wei J; Empa, Swiss Federal Institute for Materials Science and Technology, Dübendorf, 8600, Switzerland.
  • Mohn J; Empa, Swiss Federal Institute for Materials Science and Technology, Dübendorf, 8600, Switzerland.
  • Bürgmann H; Eawag, Swiss Federal Institute for Aquatic Science and Technology, Kastanienbaum, 6047, Switzerland.
  • Joss A; Eawag, Swiss Federal Institute for Aquatic Science and Technology, Dübendorf, 8600, Switzerland.
  • Lehmann MF; Aquatic and Isotope Biogeochemistry, Department of Environmental Sciences, University of Basel, Basel, 4056, Switzerland.
Sci Rep ; 11(1): 7850, 2021 04 12.
Article en En | MEDLINE | ID: mdl-33846510
Anaerobic ammonium oxidation (anammox) plays an important role in aquatic systems as a sink of bioavailable nitrogen (N), and in engineered processes by removing ammonium from wastewater. The isotope effects anammox imparts in the N isotope signatures (15N/14N) of ammonium, nitrite, and nitrate can be used to estimate its role in environmental settings, to describe physiological and ecological variations in the anammox process, and possibly to optimize anammox-based wastewater treatment. We measured the stable N-isotope composition of ammonium, nitrite, and nitrate in wastewater cultivations of anammox bacteria. We find that the N isotope enrichment factor 15ε for the reduction of nitrite to N2 is consistent across all experimental conditions (13.5‰ ± 3.7‰), suggesting it reflects the composition of the anammox bacteria community. Values of 15ε for the oxidation of nitrite to nitrate (inverse isotope effect, - 16 to - 43‰) and for the reduction of ammonium to N2 (normal isotope effect, 19-32‰) are more variable, and likely controlled by experimental conditions. We argue that the variations in the isotope effects can be tied to the metabolism and physiology of anammox bacteria, and that the broad range of isotope effects observed for anammox introduces complications for analyzing N-isotope mass balances in natural systems.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Diagnostic_studies Idioma: En Revista: Sci Rep Año: 2021 Tipo del documento: Article País de afiliación: Suiza Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Diagnostic_studies Idioma: En Revista: Sci Rep Año: 2021 Tipo del documento: Article País de afiliación: Suiza Pais de publicación: Reino Unido