Article (Scientific journals)
Dynamics and emissions of N2O in groundwater: A review
Jurado Elices, Anna; Borges, Alberto; Brouyère, Serge
2017In Science of the Total Environment, 584-585C, p. 207-218
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Keywords :
agricultural areas; denitrification; groundwater; indirect emissions; nitrification; nitrous oxide
Abstract :
[en] This work reviews the concentrations, the dynamics and the emissions of nitrous oxide (N2O) in groundwater. N2O is an important greenhouse gas (GHG) and the primary stratospheric ozone depleting substance. The major anthropogenic source that contributes to N2O generation in aquifers is agriculture because the use of fertilizers has led to the widespread groundwater contamination by inorganic nitrogen (N) (mainly nitrate, NO3−). Once in the aquifer, this inorganic N is transported and affected by several geochemical processes that produce and consume N2O. An inventory of dissolved N2O concentrations is presented and the highest dissolved concentration is about 18.000 times higher than air-equilibrated water (up to 4004 μg N L-1). The accumulation of N2O in groundwater is mainly due to denitrification and to lesser extent to nitrification. Their occurrence depend on the geochemical (e.g., NO3−, dissolved oxygen, ammonium and dissolved organic carbon) as well as hydrogeological parameters (e.g., groundwater table fluctuations and aquifer permeability). The coupled understanding of both parameters is necessary to gain insight on the dynamics and the emissions of N2O in groundwater. Overall, groundwater indirect N2O emissions seem to be a minor component of N2O emissions to the atmosphere. Further research might be devoted to evaluate the groundwater contribution to the indirect emissions of N2O because this will help to better constraint the N2O global budget and, consequently, the N budget.
Research center :
UEE - Urban and Environmental Engineering - ULiège
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Geological, petroleum & mining engineering
Earth sciences & physical geography
Author, co-author :
Jurado Elices, Anna ;  Université de Liège > Département ArGEnCo > Hydrogéologie & Géologie de l'environnement
Borges, Alberto  ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Chemical Oceanography Unit (AGO)
Brouyère, Serge  ;  Université de Liège > Département ArGEnCo > Hydrogéologie & Géologie de l'environnement
Language :
English
Title :
Dynamics and emissions of N2O in groundwater: A review
Publication date :
January 2017
Journal title :
Science of the Total Environment
ISSN :
0048-9697
eISSN :
1879-1026
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
584-585C
Pages :
207-218
Peer reviewed :
Peer Reviewed verified by ORBi
European Projects :
FP7 - 600405 - BEIPD - Be International Post-Doc - Euregion and Greater Region
Funders :
University of Liège and the EU through the Marie Curie BeIPD-COFUND postdoctoral fellowship programme (2015–2017)
CE - Commission Européenne [BE]
Available on ORBi :
since 07 February 2017

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