<div class="csl-bib-body">
<div class="csl-entry">Fricko, N., Wanek, W., & Fellner, J. (2022). Applying the <sup>1</sup><sup>5</sup>N labelling technique to material derived from a landfill simulation experiment to understand nitrogen cycle processes under aerobic and anaerobic conditions. <i>Biodegradation</i>, <i>33</i>(6), 557–573. https://doi.org/10.1007/s10532-022-10000-7</div>
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dc.identifier.issn
0923-9820
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/101880
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dc.description.abstract
Reactive nitrogen (N) species, such as ammonium (NH₄⁺), nitrate (NO₃) and gaseous nitrous oxide (N₂O), are released into the environment during the degradation of municipal solid waste (MSW), causing persistent environmental problems. Landfill remediation measures, such as in-situ aeration, may accelerate the degradation of organic compounds and reduce the discharge of ammonium via leachate. Nonetheless, the actual amount of N in the waste material remains relatively constant and a coherent explanation for the decline in leachate ammonium concentrations is still lacking. Hence, the present study aimed to elucidate the dynamics of N and its transformation processes during waste degradation. To this end, the gross rates of organic N mineralization and nitrification were measured using ¹⁵N pool dilution in waste material derived from a landfill simulation reactor (LSR) experiment. The results revealed a high potential for N mineralization and nitrification, the latter of which declined with the diminishing amount of extractable ammonium (after aeration). The analysis of the concentration and isotopic composition of N₂O formed confirmed incomplete denitrification as the main source for N₂O. Moreover, the natural abundance of ¹⁵N was investigated in various waste N pools to verify the conclusions drawn from the ¹⁵N tracing experiment. δ¹⁵N values of total waste N increased during aeration, indicating that nitrification is the major driver for N losses from aerated waste. The application of stable isotopes thereby allowed unprecedented insights into the complex N dynamics in decomposing landfill waste, of their response to aeration and their effect on hydrological versus gaseous loss pathways.
en
dc.language.iso
en
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dc.publisher
SPRINGER
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dc.relation.ispartof
Biodegradation
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dc.subject
Solid Waste
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dc.subject
Nitrous Oxide
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dc.subject
Anaerobiosis
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dc.subject
Nitrates
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dc.subject
Biodegradation, Environmental
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dc.subject
Waste Disposal Facilities
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dc.subject
Nitrogen
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dc.subject
Nitrification
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dc.subject
Organic Chemicals
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dc.subject
Bioreactors
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dc.subject
¹⁵N isotope pool dilution assay
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dc.subject
¹⁵N natural abundance
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dc.subject
Ammonium
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dc.subject
Landfill aeration
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dc.subject
Landfill aftercare
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dc.subject
Nitrate
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dc.subject
Refuse Disposal
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dc.subject
Water Pollutants, Chemical
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dc.subject
Ammonium Compounds
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dc.title
Applying the ¹⁵N labelling technique to material derived from a landfill simulation experiment to understand nitrogen cycle processes under aerobic and anaerobic conditions