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@PHDTHESIS{Wei:845638,
author = {Wei, Jing},
title = {{R}eactions between nitrite and soil organicmatter and
their role in nitrogen trace gasemissions and nitrogen
retention in soil},
volume = {409},
school = {Universität Bonn},
type = {Dissertation},
address = {Jülich},
publisher = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
reportid = {FZJ-2018-02854},
isbn = {978-3-95806-299-3},
series = {Schriften des Forschungszentrums Jülich Reihe Energie $\&$
Umwelt / Energy $\&$ Environment},
pages = {XXII, 160 S.},
year = {2018},
note = {Universität Bonn, Diss., 2018},
abstract = {As a key intermediate of both nitrification and
denitrification, nitrite (NO$_{2}^{‒}$) is highly
chemically reactive to soil organic matter (SOM), and it was
proved previously that considerable amounts ofnitrogen (N)
trace gases, including nitrous oxide (N$_{2}$O) and nitrogen
oxides (NO$_{x}$), were produced from the reactions of
NO$_{2}^{‒}$ with SOM in chemical assays decades ago.
However, the role of NO$_{2}^{‒}$‒SOM reactions in
nitrogen trace gas emissions and nitrogen retention in soils
has been neglected until recently. It is vital to identify
and quantify major sources and sinks of nitrogen trace gases
for the sake of the environment. On the other hand, better
understanding of N$_{2}$O sources and nitrogen retention is
also essential to improve the nitrogen use efficiency and
soil fertility in agriculture. Therefore, this thesis aimed
to gain a better understanding of the contribution of
NO$_{2}^{‒}$‒SOM reactions to nitrogen trace gas
emissions and nitrogen retention in soil. Emissions of
N$_{2}$O and carbon dioxide (CO$_{2}$) from the reactions of
NO$_{2}^{‒}$ with lignin and ligninderivatives
(4‐hydroxybenzoic acid, 4‐hydroxybenzaldehyde,
4‐hydroxy‐3‐methoxybenzoic acid,
4‐hydroxy‐3‐methoxybenzaldehyde,
4‐hydroxy‐3,5‐dimethoxybenzoic acid,
4‐hydroxy‐3,5‐dimethoxybenzaldehyde), as well as
N$_{2}$O isotopic signatures, were studied in chemical
assays at pH 3‒6. Among the six tested lignin derivatives,
the highest N$_{2}$O emission was found in the
4‐hydroxy‐3,5‐dimethoxybenzaldehyde treatment, and the
dependency of N$_{2}$O and CO$_{2}$ on pH varied according
to the structures of the organic substances. Most
interestingly, N$_{2}$O $^{15}$N site preference (SP) varied
largely from 11.9‒37.4 ‰ depending on pH and structures
of lignin derivatives, which was undistinguishable from
other N$_{2}$O sources, such as nitrification,
denitrification, and abiotic hydroxylamine oxidation.
Furthermore, real‐time N$_{2}$O isotopic characterization
revealed that SP also shifted largely during the reaction of
NO$_{2}^{‒}$ with lignin derivatives. Hyponitrous acid and
nitramide pathways, which could be responsible for N$_{2}$O
formation, were proposed to explain the shift of N$_{2}$O SP
values. [...]},
cin = {IBG-3},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {255 - Terrestrial Systems: From Observation to Prediction
(POF3-255)},
pid = {G:(DE-HGF)POF3-255},
typ = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
urn = {urn:nbn:de:0001-2018050906},
url = {https://juser.fz-juelich.de/record/845638},
}