Denitrification in a hypersaline lake–aquifer system (Pétrola Basin,
Central Spain): The role of recent organic matter and Cretaceous organic
rich sediments
dc.contributor.author | Gómez Alday, J.J. | |
dc.contributor.author | Carrey, R. | |
dc.contributor.author | Valiente, Nicolás | |
dc.contributor.author | Otero, Neus | |
dc.contributor.author | Soler, A. | |
dc.contributor.author | Ayora, C. | |
dc.contributor.author | Sanz Bas, David | |
dc.contributor.author | Muñoz Martín, Alfonso | |
dc.contributor.author | Castaño, S. | |
dc.contributor.author | Recio, C. | |
dc.contributor.author | Carnicero, A. | |
dc.contributor.author | Cortijo, A. | |
dc.date.accessioned | 2023-06-19T13:54:51Z | |
dc.date.available | 2023-06-19T13:54:51Z | |
dc.date.issued | 2014 | |
dc.description.abstract | Agricultural regions in semi-arid to arid climates with associated saline wetlands are one of the most vulnerable environments to nitrate pollution. The Pétrola Basin was declared vulnerable to NO3 − pollution by the Regional Government in 1998, and the hypersaline lake was classified as a heavily modified body of water. The study assessed groundwater NO3 − through the use of multi-isotopic tracers (δ15N, δ34S, δ13C, δ18O) coupled to hydrochemistry in the aquifer connected to the eutrophic lake. Hydrogeologically, the basin shows two main flow components: regional groundwater flow from recharge areas (Zone 1) to the lake (Zone 2), and a density-driven flow from surface water to the underlying aquifer (Zone 3). In Zones 1 and 2, δ15NNO3 and δ18ONO3 suggest that NO3 − from slightly volatilized ammonium synthetic fertilizers is only partially denitrified. The natural attenuation of NO3 − can occur by heterotrophic reactions. However, autotrophic reactions cannot be ruled out. In Zone 3, the freshwater–saltwater interface (down to 12–16 m below the ground surface) is a reactive zone for NO3 − attenuation. Tritium data suggest that the absence of NO3 − in the deepest zones of the aquifer under the lake can be attributed to a regional groundwater flow with long residence time. In hypersaline lakes the geometry of the density-driven flow can play an important role in the transport of chemical species that can be related to denitrification processes. | |
dc.description.department | Depto. de Geodinámica, Estratigrafía y Paleontología | |
dc.description.faculty | Fac. de Ciencias Geológicas | |
dc.description.refereed | TRUE | |
dc.description.sponsorship | Castilla–La Mancha Government | |
dc.description.sponsorship | Spanish Government | |
dc.description.sponsorship | Catalan Government | |
dc.description.status | pub | |
dc.eprint.id | https://eprints.ucm.es/id/eprint/78556 | |
dc.identifier.doi | 10.1016/j.scitotenv.2014.07.129 | |
dc.identifier.issn | 0048-9697, ESSN: 1879-1026 | |
dc.identifier.officialurl | http://dx.doi.org/10.1016/j.scitotenv.2014.07.129 | |
dc.identifier.uri | https://hdl.handle.net/20.500.14352/34607 | |
dc.journal.title | Science of the total environment | |
dc.language.iso | eng | |
dc.page.final | 606 | |
dc.page.initial | 594 | |
dc.publisher | Elsevier | |
dc.relation.projectID | PEIC11-0135-8842 | |
dc.relation.projectID | CICYT-CGL2011-29975-C04-01 | |
dc.relation.projectID | CICYT-CGL2011-29975-C04-02 | |
dc.relation.projectID | 2014 SGR 1456 | |
dc.rights | Atribución-NoComercial-SinDerivadas 3.0 España | |
dc.rights.accessRights | open access | |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/3.0/es/ | |
dc.subject.cdu | 550.4(234.1) | |
dc.subject.keyword | Hypersaline lake | |
dc.subject.keyword | Freshwater–saltwater interfacem | |
dc.subject.keyword | Stable isotopes | |
dc.subject.keyword | Nitrification | |
dc.subject.keyword | Denitrification | |
dc.subject.ucm | Geodinámica | |
dc.subject.ucm | Geoquímica | |
dc.subject.unesco | 2507 Geofísica | |
dc.subject.unesco | 2503 Geoquímica | |
dc.title | Denitrification in a hypersaline lake–aquifer system (Pétrola Basin, Central Spain): The role of recent organic matter and Cretaceous organic rich sediments | |
dc.type | journal article | |
dc.volume.number | 497-8 | |
dspace.entity.type | Publication | |
relation.isAuthorOfPublication | 70f369a3-b3cd-43cb-874e-a7888da25de1 | |
relation.isAuthorOfPublication.latestForDiscovery | 70f369a3-b3cd-43cb-874e-a7888da25de1 |
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