Nitrogen isotope effects can be used to diagnose N transformations in wastewater anammox systems

Abstract 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 nit...

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Autores principales:	Paul M. Magyar, Damian Hausherr, Robert Niederdorfer, Nicolas Stöcklin, Jing Wei, Joachim Mohn, Helmut Bürgmann, Adriano Joss, Moritz F. Lehmann
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/da8879b7a9e04023af85586f08e569bb
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spelling	oai:doaj.org-article:da8879b7a9e04023af85586f08e569bb2021-12-02T14:26:16ZNitrogen isotope effects can be used to diagnose N transformations in wastewater anammox systems10.1038/s41598-021-87184-02045-2322https://doaj.org/article/da8879b7a9e04023af85586f08e569bb2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87184-0https://doaj.org/toc/2045-2322Abstract 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.Paul M. MagyarDamian HausherrRobert NiederdorferNicolas StöcklinJing WeiJoachim MohnHelmut BürgmannAdriano JossMoritz F. LehmannNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Paul M. Magyar Damian Hausherr Robert Niederdorfer Nicolas Stöcklin Jing Wei Joachim Mohn Helmut Bürgmann Adriano Joss Moritz F. Lehmann Nitrogen isotope effects can be used to diagnose N transformations in wastewater anammox systems
description	Abstract 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.
format	article
author	Paul M. Magyar Damian Hausherr Robert Niederdorfer Nicolas Stöcklin Jing Wei Joachim Mohn Helmut Bürgmann Adriano Joss Moritz F. Lehmann
author_facet	Paul M. Magyar Damian Hausherr Robert Niederdorfer Nicolas Stöcklin Jing Wei Joachim Mohn Helmut Bürgmann Adriano Joss Moritz F. Lehmann
author_sort	Paul M. Magyar
title	Nitrogen isotope effects can be used to diagnose N transformations in wastewater anammox systems
title_short	Nitrogen isotope effects can be used to diagnose N transformations in wastewater anammox systems
title_full	Nitrogen isotope effects can be used to diagnose N transformations in wastewater anammox systems
title_fullStr	Nitrogen isotope effects can be used to diagnose N transformations in wastewater anammox systems
title_full_unstemmed	Nitrogen isotope effects can be used to diagnose N transformations in wastewater anammox systems
title_sort	nitrogen isotope effects can be used to diagnose n transformations in wastewater anammox systems
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/da8879b7a9e04023af85586f08e569bb
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_version_	1718391400231337984

Nitrogen isotope effects can be used to diagnose N transformations in wastewater anammox systems

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