{"type": "FeatureCollection", "features": [{"id": "10.1016/j.egypro.2018.07.024", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:15:52Z", "type": "Journal Article", "created": "2018-07-18", "title": "Extent of natural attenuation of chlorinated ethenes at a contaminated site in Denmark", "description": "Abstract   Chlorinated solvents contaminated soils and aquifers are a widespread problem in industrialized countries and many require clean-up due to the risk of contaminant flow into groundwater systems. Clean-up is costly and often invasive, thus there is high interest in stimulating natural attenuation processes. For this, first an assessment of the type and extent of natural attenuation present at the site is required. Here, we present chemical, isotopic and microbial analyses of waters collected at a chlorinated ethene contaminated site in Denmark to give insights into natural attenuation processes. The data gives indication of complete reductive dechlorination by microbial communities but their extent varies greatly across short distances and between the different geological layers. The data further indicates that overall, chlorinated ethene degradation through natural attenuation is small at this site but near surface degradation due to aerobic co-metabolism or abiotic geochemical reduction could potentially play a role.", "keywords": ["0301 basic medicine", "03 medical and health sciences", "C", "13. Climate action", "Chlorinated solvents", "remediation", "compound stable isotope analysis", "Chlorinated solvents", " remediation", " compound stable isotope analysis", "01 natural sciences", "6. Clean water", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.egypro.2018.07.024"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Energy%20Procedia", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.egypro.2018.07.024", "name": "item", "description": "10.1016/j.egypro.2018.07.024", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.egypro.2018.07.024"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-07-01T00:00:00Z"}}, {"id": "10.1016/j.jconhyd.2021.103797", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:16:25Z", "type": "Journal Article", "created": "2021-03-18", "title": "Dynamics of nitrous oxide with depth in groundwater: Insights from ambient groundwater and laboratory incubation experiments (Hesbaye chalk aquifer, Belgium)", "description": "Aquifers under agricultural areas are considered to be an indirect source of nitrous oxide emission (N2O) to the atmosphere, which is the greenhouse gas (GHGs) characterized with the highest global warning potential and acts as a stratospheric ozone depletion agent. Previous investigations performed in the Cretaceous Hesbaye chalk aquifer in Eastern Belgium suggested that the dynamics of N2O in the aquifer is controlled by overlapping biochemical processes such as nitrification and denitrification. The current study aims to obtain better insight concerning the factors controlling the distribution of N2O concentration along a vertical dimension in the aquifer, and to capture and quantify the occurrence of nitrification and denitrification processes in the groundwater system. Low-flow groundwater sampling technique was undertaken at different depths in the aquifer to collect groundwater samples aiming at obtaining information about ambient aquifer hydrogeochemical conditions and their effect on the accumulation of GHGs. Afterwards, laboratory stable isotope experiments, using NO3- and NH4+ compounds labeled with heavy 15N isotope, were applied to quantify the rates of nitrification and denitrification processes. Ambient studies suggest that the occurrence of N transformation was related to denitrification while laboratory incubation experiments did not detect it. Such controversial results might be explained by the discrepancy between real aquifer conditions and lab design studies. Thus, additional in situ tracer experiments should be carried out in areas where natural groundwater fluxes do not flush the injected tracer too rapidly. In addition, it would be useful to conduct microbiological studies to obtain better insight into the nature of subsurface biofilm biotope.", "keywords": ["2. Zero hunger", "Nitrous Oxide", "N stable isotope analysis", "Nitrification", "01 natural sciences", "Low-flow sampling", "6. Clean water", "Calcium Carbonate", "Greenhouse gases", "Belgium", "13. Climate action", "Denitrification", "Laboratories", "Groundwater", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.jconhyd.2021.103797"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Contaminant%20Hydrology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.jconhyd.2021.103797", "name": "item", "description": "10.1016/j.jconhyd.2021.103797", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.jconhyd.2021.103797"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-08-01T00:00:00Z"}}, {"id": "10.1038/srep08280", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:17:39Z", "type": "Journal Article", "created": "2015-02-06", "title": "Convergence Of Soil Nitrogen Isotopes Across Global Climate Gradients", "description": "Abstract<p>Quantifying global patterns of terrestrial nitrogen (N) cycling is central to predicting future patterns of primary productivity, carbon sequestration, nutrient fluxes to aquatic systems and climate forcing. With limited direct measures of soil N cycling at the global scale, syntheses of the 15N:14N ratio of soil organic matter across climate gradients provide key insights into understanding global patterns of N cycling. In synthesizing data from over 6000 soil samples, we show strong global relationships among soil N isotopes, mean annual temperature (MAT), mean annual precipitation (MAP) and the concentrations of organic carbon and clay in soil. In both hot ecosystems and dry ecosystems, soil organic matter was more enriched in 15N than in corresponding cold ecosystems or wet ecosystems. Below a MAT of 9.8\uffc2\uffb0C, soil \uffce\uffb415N was invariant with MAT. At the global scale, soil organic C concentrations also declined with increasing MAT and decreasing MAP. After standardizing for variation among mineral soils in soil C and clay concentrations, soil \uffce\uffb415N showed no consistent trends across global climate and latitudinal gradients. Our analyses could place new constraints on interpretations of patterns of ecosystem N cycling and global budgets of gaseous N loss.</p>", "keywords": ["N-15 Natural-Abundance", "550", "Ecosystem ecology", "TROPICAL FORESTS", "Organic chemistry", "Suelo", "Nitrogen cycle", "01 natural sciences", "Nutrient cycle", "cycle de l'azote", "CARBON", "Agricultural and Biological Sciences", "Soil", "Terrestrial ecosystem", "Isotopes", "https://purl.org/becyt/ford/1.6", "Soil water", "SDG 13 - Climate Action", "N-15 NATURAL-ABUNDANCE", "Climate change", "croisement de donn\u00e9es", "Milieux et Changements globaux", "SDG 15 \u2013 Leben an Land", "Global change", "SDG 15 - Life on Land", "2. Zero hunger", "106022 Mikrobiologie", "Climatic Factors", "Tropical Forests", "Ecology", "Geography", "Nitr\u00f3geno", "Nutrient Cycling", "FRACTIONATION", "Litter Decomposition", "ECOSYSTEM ECOLOGY", "Life Sciences", "ecosystem ecology", "Cycling", "Forestry", "Is\u00f3topos", "Carbon cycle", "04 agricultural and veterinary sciences", "Nitrogen Cycle", "Soil carbon", "6. Clean water", "Organic-Matter", "Earth and Planetary Sciences", "ORGANIC-MATTER", "Chemistry", "PRECIPITATION", "SDG 13 \u2013 Ma\u00dfnahmen zum Klimaschutz", "Physical Sciences", "106022 Microbiology", "carbone du sol", "Stable Isotope Analysis of Groundwater and Precipitation", "Ecosystem Functioning", "570", "STABLE ISOTOPE", "Biogeochemical Cycling of Nutrients in Aquatic Ecosystems", "Stable isotope analysis", "Nitrogen", "[SDE.MCG]Environmental Sciences/Global Changes", "Soil Science", "stable isotope analysis;ecosystem ecology", "Article", "Environmental science", "LITTER DECOMPOSITION", "sol min\u00e9ral", "INORGANIC NITROGEN", "Geochemistry and Petrology", "stable isotope analysis", "Carbono", "Environmental Chemistry", "Factores Clim\u00e1ticos", "https://purl.org/becyt/ford/1", "Biology", "Ecosystem", "0105 earth and related environmental sciences", "Soil science", "Soil organic matter", "Soil Fertility", "climat", "AVAILABILITY", "Nitrogen Dynamics", "15. Life on land", "Carbon", "Inorganic", "NITROGEN", "MODEL", "[SDE.MCG] Environmental Sciences/Global Changes", "13. Climate action", "FOS: Biological sciences", "Environmental Science", "PATTERNS", "0401 agriculture", " forestry", " and fisheries", "Soil Carbon Dynamics and Nutrient Cycling in Ecosystems"]}, "links": [{"href": "https://scholars.unh.edu/context/faculty_pubs/article/1042/viewcontent/srep08280.pdf"}, {"href": "https://edoc.unibas.ch/37215/1/srep08280.pdf"}, {"href": "https://doi.org/10.1038/srep08280"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Scientific%20Reports", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/srep08280", "name": "item", "description": "10.1038/srep08280", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/srep08280"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2015-02-06T00:00:00Z"}}, {"id": "21.15107/rcub_dais_15782", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:25:10Z", "type": "Journal Article", "created": "2023-11-26", "title": "A Medieval Burial from the Site of Supska: An Anthropological and Contextual Analysis of the Skeletal Remains from Grave 1", "description": "In 1956, the Institute of Archaeology and the National Museum in Belgrade carried out excavations at the site of Supska, near \u0106uprija, in Central Serbia. Based on the material culture findings, the site is mostly known as a Late Neolithic one; however, archaeological findings from other periods were discovered too. In the 1956 excavations, the cultural layers, and archaeological features with the Vin\u010da culture archaeological materials were examined, as well as one grave, marked as Grave 1. The results of this excavation have been previously published in one monograph; however, an anthropological analysis of the individual found in Grave 1 has not been conducted before. In this paper, we present the results of contextual, bioanthropological, stable isotopes and C14 analyses of human skeletal remains found in Grave 1. The results showed that a young adult, who had experienced nonspecific metabolic stress during childhood, as evidenced by traces of linear enamel hypoplasia and porotic hyperostosis, was buried in this grave. AMS date revealed that this individual lived between 1280\u20131390 cal. AD, while the results of the stable isotope analyses suggested that it had mixed diet based on C4 plants (such as millet) and/or C3 plants, with larger amounts of animal protein, possible deriving from freshwater fish.", "keywords": ["Stable isotope analysis", "burial", "human skeletal remains", "stable isotopes", "Medieval period", "Medieval Burial", "Supska", "AMS dating", "14C AMS Dating"]}, "links": [{"href": "http://dais.sanu.ac.rs/bitstream/id/62730/bitstream_62730.pdf"}, {"href": "https://doi.org/21.15107/rcub_dais_15782"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/%D0%97%D0%B1%D0%BE%D1%80%D0%BD%D0%B8%D0%BA%20%D0%9D%D0%B0%D1%80%D0%BE%D0%B4%D0%BD%D0%BE%D0%B3%20%D0%BC%D1%83%D0%B7%D0%B5%D1%98%D0%B0%20%D0%A1%D1%80%D0%B1%D0%B8%D1%98%D0%B5.%20%D0%90%D1%80%D1%85%D0%B5%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%98%D0%B0%20%3D%20Recueil%20du%20Mus%C3%A9e%20national%20de%20Serbie.%20Arch%C3%A9ologie", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "21.15107/rcub_dais_15782", "name": "item", "description": "21.15107/rcub_dais_15782", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/21.15107/rcub_dais_15782"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-01-01T00:00:00Z"}}, {"id": "10.18485/znms_arh.2023.26.1.20", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:19:42Z", "type": "Journal Article", "created": "2023-11-26", "title": "A Medieval Burial from the Site of Supska: An Anthropological and Contextual Analysis of the Skeletal Remains from Grave 1", "description": "In 1956, the Institute of Archaeology and the National Museum in Belgrade carried out excavations at the site of Supska, near \u0106uprija, in Central Serbia. Based on the material culture findings, the site is mostly known as a Late Neolithic one; however, archaeological findings from other periods were discovered too. In the 1956 excavations, the cultural layers, and archaeological features with the Vin\u010da culture archaeological materials were examined, as well as one grave, marked as Grave 1. The results of this excavation have been previously published in one monograph; however, an anthropological analysis of the individual found in Grave 1 has not been conducted before. In this paper, we present the results of contextual, bioanthropological, stable isotopes and C14 analyses of human skeletal remains found in Grave 1. The results showed that a young adult, who had experienced nonspecific metabolic stress during childhood, as evidenced by traces of linear enamel hypoplasia and porotic hyperostosis, was buried in this grave. AMS date revealed that this individual lived between 1280\u20131390 cal. AD, while the results of the stable isotope analyses suggested that it had mixed diet based on C4 plants (such as millet) and/or C3 plants, with larger amounts of animal protein, possible deriving from freshwater fish.", "keywords": ["Stable isotope analysis", "burial", "human skeletal remains", "stable isotopes", "Medieval period", "Medieval Burial", "Supska", "AMS dating", "14C AMS Dating"]}, "links": [{"href": "http://dais.sanu.ac.rs/bitstream/id/62730/bitstream_62730.pdf"}, {"href": "https://doi.org/10.18485/znms_arh.2023.26.1.20"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/%D0%97%D0%B1%D0%BE%D1%80%D0%BD%D0%B8%D0%BA%20%D0%9D%D0%B0%D1%80%D0%BE%D0%B4%D0%BD%D0%BE%D0%B3%20%D0%BC%D1%83%D0%B7%D0%B5%D1%98%D0%B0%20%D0%A1%D1%80%D0%B1%D0%B8%D1%98%D0%B5.%20%D0%90%D1%80%D1%85%D0%B5%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%98%D0%B0%20%3D%20Recueil%20du%20Mus%C3%A9e%20national%20de%20Serbie.%20Arch%C3%A9ologie", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.18485/znms_arh.2023.26.1.20", "name": "item", "description": "10.18485/znms_arh.2023.26.1.20", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.18485/znms_arh.2023.26.1.20"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-01-01T00:00:00Z"}}, {"id": "2268/234713", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:25:16Z", "type": "Journal Article", "created": "2019-04-14", "title": "Dynamics of greenhouse gases in groundwater: hydrogeological and hydrogeochemical controls", "description": "Abstract   In this study the variability of greenhouse gases (GHGs) concentrations along lateral and vertical dimensions of the chalk aquifer located in the eastern part of Belgium was examined in order to understand its dependence on hydrogeological and hydrogeochemical conditions. Groundwater samples from 29 wells/piezometers were analyzed for concentrations of nitrous oxide (N2O), carbon dioxide (CO2), methane (CH4), major and minor elements and stable isotopes of nitrate (NO3\u2212), nitrous oxide (N2O), sulfate (SO42\u2212) and boron (B). For lateral investigations, four zones with different environmental settings were identified (southern, central, north-eastern and northern). Groundwater was oversaturated with GHGs with respect to its equilibrium concentrations with the atmosphere in all zones, except the northern one, undersaturated in N2O (0.07\u202f\u00b1\u202f0.08\u202f\u03bcgN/L vs. 0.3\u202f\u03bcgN/L). Vertical dimension studies showed the decrease in CO2 concentration and significant changes in both isotope signatures and concentration of N2O with depth. The production of N2O could be attributed to a combination of nitrification and denitrification processes occurring at different depths. CO2 concentration is controlled by the process of dissolution of carbonate minerals which constitute aquifer geology. CH4 is produced due to methanogenesis in deeper parts of the aquifer, though its thermogenic origin is also possible. Differences in hydrogeochemical settings and changing intensity of biogeochemical processes across the area and with depth have considerable effect on GHGs concentrations. Thus, before estimating GHGs fluxes at the groundwater\u2013river interface insights obtained from larger-scale investigations are required in order to identify the representative spatial zones which govern GHGs emissions.", "keywords": ["2. Zero hunger", "Stable isotope analysis", "Physique", " chimie", " math\u00e9matiques & sciences de la terre", "Agriculture", "01 natural sciences", "Geological", " petroleum & mining engineering", "6. Clean water", "Engineering", " computing & technology", "Ing\u00e9nierie", " informatique & technologie", "Sciences de la terre & g\u00e9ographie physique", "Indirect emissions", "Physical", " chemical", " mathematical & earth Sciences", "13. Climate action", "Earth sciences & physical geography", "G\u00e9ologie", " ing\u00e9nierie du p\u00e9trole & des mines", "Greenhouse gases (GHGs)", "Groundwater", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://orbi.uliege.be/bitstream/2268/234713/1/GHG%20Geer%20Appl.%20Geochem%202019%20VF.pdf"}, {"href": "https://doi.org/2268/234713"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Applied%20Geochemistry", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "2268/234713", "name": "item", "description": "2268/234713", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/2268/234713"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-06-01T00:00:00Z"}}, {"id": "2268/215300", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:25:16Z", "type": "Journal Article", "created": "2017-10-23", "title": "Isotopic composition of nitrogen species in groundwater under agricultural areas: A review", "description": "This work reviews applications of stable isotope analysis to the studies of transport and transformation of N species in groundwater under agricultural areas. It summarizes evidence regarding factors affecting the isotopic composition of NO3-, NH4+ and N2O in subsurface, and discusses the use of 11B, 18O, 13C, 34S, 87Sr/86Sr isotopes to support the analysis of \u03b415N values. The isotopic composition of NO3-, NH4+ and N2O varies depending on their sources and dynamics of N cycle processes. The reported \u03b415N-NO3- values for sources of NO3- are: soil organic N - +3\u2030-+8\u2030, mineral fertilizers - -8\u2030-+7\u2030; manure/household waste - +5\u2030 to +35\u2030. For NH4+ sources, the isotopic signature ranges are: organic matter - +2.4-+4.1\u2030, rainwater - -13.4-+2.3\u2030, mineral fertilizers - -7.4-+5.1\u2030, household waste - +5-+9\u2030; animal manure - +8-+11\u2030. For N2O, isotopic composition depends on isotopic signatures of substrate pools and reaction rates. \u03b415N values of NO3- are influenced by fractionation effects occurring during denitrification (\u025b=5-40\u2030), nitrification (\u025b=5-35\u2030) and DNRA (\u025b not reported). The isotopic signature of NH4+ is also affected by nitrification and DNRA as well as mineralization (\u025b=1\u2030), sorption (\u025b=1-8\u2030), anammox (\u025b=4.3-7.4\u2030) and volatilization (\u025b=25\u2030). As for the N2O, production of N2O leads to its depletion in 15N, whereas consumption - to enrichment in 15N. The magnitude of fractionation effects occurring during the considered processes depends on temperature, pH, DO, C/NO3- ratio, size of the substrate pool, availability of electron donors, water content in subsoil, residence time, land use, hydrogeology. While previous studies have accumulated rich data on isotopic composition of NO3- in groundwater, evidence remains scarce in the cases of NH4+ and N2O. Further research is required to consider variability of \u03b415N-NH4+ and \u03b415N-N2O in groundwater across agricultural ecosystems.", "keywords": ["groundwater pollution", "N anthropogenic sources", "Physique", " chimie", " math\u00e9matiques & sciences de la terre", "0207 environmental engineering", "N cycle processes", "02 engineering and technology", "N isotopes", "15. Life on land", "01 natural sciences", "Geological", " petroleum & mining engineering", "6. Clean water", "Engineering", " computing & technology", "Ing\u00e9nierie", " informatique & technologie", "Sciences de la terre & g\u00e9ographie physique", "12. Responsible consumption", "Physical", " chemical", " mathematical & earth Sciences", "13. Climate action", "stable isotope analysis", "Earth sciences & physical geography", "G\u00e9ologie", " ing\u00e9nierie du p\u00e9trole & des mines", "agriculture", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://orbi.uliege.be/bitstream/2268/215300/1/final%20version.pdf"}, {"href": "https://doi.org/2268/215300"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Science%20of%20The%20Total%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "2268/215300", "name": "item", "description": "2268/215300", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/2268/215300"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-04-01T00:00:00Z"}}, {"id": "2268/262547", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:25:16Z", "type": "Journal Article", "created": "2021-03-18", "title": "Dynamics of nitrous oxide with depth in groundwater: Insights from ambient groundwater and laboratory incubation experiments (Hesbaye chalk aquifer, Belgium)", "description": "Aquifers under agricultural areas are considered to be an indirect source of nitrous oxide emission (N2O) to the atmosphere, which is the greenhouse gas (GHGs) characterized with the highest global warning potential and acts as a stratospheric ozone depletion agent. Previous investigations performed in the Cretaceous Hesbaye chalk aquifer in Eastern Belgium suggested that the dynamics of N2O in the aquifer is controlled by overlapping biochemical processes such as nitrification and denitrification. The current study aims to obtain better insight concerning the factors controlling the distribution of N2O concentration along a vertical dimension in the aquifer, and to capture and quantify the occurrence of nitrification and denitrification processes in the groundwater system. Low-flow groundwater sampling technique was undertaken at different depths in the aquifer to collect groundwater samples aiming at obtaining information about ambient aquifer hydrogeochemical conditions and their effect on the accumulation of GHGs. Afterwards, laboratory stable isotope experiments, using NO3- and NH4+ compounds labeled with heavy 15N isotope, were applied to quantify the rates of nitrification and denitrification processes. Ambient studies suggest that the occurrence of N transformation was related to denitrification while laboratory incubation experiments did not detect it. Such controversial results might be explained by the discrepancy between real aquifer conditions and lab design studies. Thus, additional in situ tracer experiments should be carried out in areas where natural groundwater fluxes do not flush the injected tracer too rapidly. In addition, it would be useful to conduct microbiological studies to obtain better insight into the nature of subsurface biofilm biotope.", "keywords": ["Sciences aquatiques & oc\u00e9anologie", "Physique", " chimie", " math\u00e9matiques & sciences de la terre", "Nitrous Oxide", "01 natural sciences", "Low-flow sampling", "Ing\u00e9nierie", " informatique & technologie", "Calcium Carbonate", "Physical", " chemical", " mathematical & earth Sciences", "Belgium", "Groundwater", "0105 earth and related environmental sciences", "2. Zero hunger", "Aquatic sciences & oceanology", "N stable isotope analysis", "Life sciences", "Nitrification", "Geological", " petroleum & mining engineering", "6. Clean water", "Engineering", " computing & technology", "Sciences de la terre & g\u00e9ographie physique", "Greenhouse gases", "13. Climate action", "Earth sciences & physical geography", "Sciences du vivant", "Denitrification", "G\u00e9ologie", " ing\u00e9nierie du p\u00e9trole & des mines", "Laboratories"]}, "links": [{"href": "https://orbi.uliege.be/bitstream/2268/262547/2/Dynamics%20of%20nitrous%20oxide%20with%20depth%20in%20groundwater%20insights%20from%20ambient%20groundwater.pdf"}, {"href": "https://doi.org/2268/262547"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Contaminant%20Hydrology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "2268/262547", "name": "item", "description": "2268/262547", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/2268/262547"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-08-01T00:00:00Z"}}, {"id": "3138664797", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:25:45Z", "type": "Journal Article", "created": "2021-03-18", "title": "Dynamics of nitrous oxide with depth in groundwater: Insights from ambient groundwater and laboratory incubation experiments (Hesbaye chalk aquifer, Belgium)", "description": "Aquifers under agricultural areas are considered to be an indirect source of nitrous oxide emission (N2O) to the atmosphere, which is the greenhouse gas (GHGs) characterized with the highest global warning potential and acts as a stratospheric ozone depletion agent. Previous investigations performed in the Cretaceous Hesbaye chalk aquifer in Eastern Belgium suggested that the dynamics of N2O in the aquifer is controlled by overlapping biochemical processes such as nitrification and denitrification. The current study aims to obtain better insight concerning the factors controlling the distribution of N2O concentration along a vertical dimension in the aquifer, and to capture and quantify the occurrence of nitrification and denitrification processes in the groundwater system. Low-flow groundwater sampling technique was undertaken at different depths in the aquifer to collect groundwater samples aiming at obtaining information about ambient aquifer hydrogeochemical conditions and their effect on the accumulation of GHGs. Afterwards, laboratory stable isotope experiments, using NO3- and NH4+ compounds labeled with heavy 15N isotope, were applied to quantify the rates of nitrification and denitrification processes. Ambient studies suggest that the occurrence of N transformation was related to denitrification while laboratory incubation experiments did not detect it. Such controversial results might be explained by the discrepancy between real aquifer conditions and lab design studies. Thus, additional in situ tracer experiments should be carried out in areas where natural groundwater fluxes do not flush the injected tracer too rapidly. In addition, it would be useful to conduct microbiological studies to obtain better insight into the nature of subsurface biofilm biotope.", "keywords": ["2. Zero hunger", "Nitrous Oxide", "N stable isotope analysis", "Nitrification", "01 natural sciences", "Low-flow sampling", "6. Clean water", "Calcium Carbonate", "Greenhouse gases", "Belgium", "13. 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