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| 001 | 838934 | ||
| 005 | 20220930130135.0 | ||
| 020 | _ | _ | |a 978-3-95806-272-6 |
| 024 | 7 | _ | |2 Handle |a 2128/16004 |
| 024 | 7 | _ | |2 URN |a urn:nbn:de:0001-2017120725 |
| 024 | 7 | _ | |2 ISSN |a 1866-1793 |
| 037 | _ | _ | |a FZJ-2017-07437 |
| 041 | _ | _ | |a English |
| 100 | 1 | _ | |0 P:(DE-Juel1)156153 |a Liu, Shurong |b 0 |e Corresponding author |u fzj |
| 245 | _ | _ | |a Coupled biotic-abiotic mechanisms of nitrous oxide production in soils during nitrification involving the reactive intermediates hydroxylamineand nitrite |f - 2017-09-14 |
| 260 | _ | _ | |a Jülich |b Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag |c 2017 |
| 300 | _ | _ | |a 148 S. |
| 336 | 7 | _ | |2 DataCite |a Output Types/Dissertation |
| 336 | 7 | _ | |0 PUB:(DE-HGF)3 |2 PUB:(DE-HGF) |a Book |m book |
| 336 | 7 | _ | |2 ORCID |a DISSERTATION |
| 336 | 7 | _ | |2 BibTeX |a PHDTHESIS |
| 336 | 7 | _ | |0 2 |2 EndNote |a Thesis |
| 336 | 7 | _ | |0 PUB:(DE-HGF)11 |2 PUB:(DE-HGF) |a Dissertation / PhD Thesis |b phd |m phd |s 1511947693_9735 |
| 336 | 7 | _ | |2 DRIVER |a doctoralThesis |
| 490 | 0 | _ | |a Schriften des Forschungszentrums Jülich Reihe Energie & Umwelt / Energy & Environment |v 396 |
| 502 | _ | _ | |a Universität Bonn, Diss., 2017 |b Dissertation |c Universität Bonn |d 2017 |
| 520 | _ | _ | |a Nitrous oxide (N$_{2}$O) is an important greenhouse gas that can deplete the ozone layer. Microbial nitrification and denitrification have been long considered as the major contributors of soil N$_{2}$O production. However, the mechanisms responsible for N$_{2}$O production from nitrification are still not fully understood. The current understanding is that there are mainly two routes responsible for the N$_{2}$O production from nitrification: biological ammonia (NH$_{3}$) oxidation and nitrifier denitrification of nitrite (NO$_{2}^{-}$). However, so far it has been neglected that abiotic processes could also play an important role in the N$_{2}$O production during nitrification, involving the two reactive N intermediates hydroxylamine (NH$_{2}$OH) and NO$_{2}$-via coupled biotic-abiotic mechanisms of N$_{2}$O production. While the abiotic N$_{2}$O production from NO$_{2}^{-}$ has been studied in the last decades, the abiotic N$_{2}$O production involving NH$_{2}$OH has long been ignored. One possible reason could be that NH$_{2}$OH was not detected in soils in previous research. In addition, the release of NH$_{2}$OH during NH$_{3}$ oxidation in pure cultures of ammonia oxidizers has not been studied previously, which would be the prerequisite of abiotic N$_{2}$O production involving NH$_{2}$OH. Therefore, the aim of the present thesis was to study the relevance and mechanisms of coupled biotic-abiotic N$_{2}$O formation from NH$_{2}$OH and NO$_{2}^{-}$ during nitrification in different soils. By studying different types of ammonia oxidizers (ammonia-oxidizing bacteria (AOB), ammonia-oxidizing archaea (AOA), and complete ammonia oxidizers (comammox)), this thesis demonstrates NH$_{2}$OH release during NH$_{3}$ oxidation of various ammonia oxidizers. However, the NH$_{2}$OH:final product release ratios were different between the different microbial strains studied, ranging from 0.24% to 1.92%, and were also dependent on initial NH$_{3}$ concentrations in the medium. The presence of NO$_{2}$ - decreased the abiotic NH$_{2}$OH decay rate in the medium but increased abiotic N$_{2}$O production involving NH$_{2}$OH. The calculated fraction of NH$_{4}^{+}$ converted to N$_{2}$O via NH$_{2}$OH release during incubations ranged from 0.05% to 0.14%, which was consistent with published NH$_{4}^{+}$-to-N$_{2}$O conversion ratios for certain ammonia oxidizers. [...] |
| 536 | _ | _ | |0 G:(DE-HGF)POF3-255 |a 255 - Terrestrial Systems: From Observation to Prediction (POF3-255) |c POF3-255 |f POF III |x 0 |
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