Assessment of sources and fate of nitrate in shallow groundwater of an agricultural area by using a multi-tracer approach

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dc.creatorAldo Iván Ramírez Orozco
dc.creatorRogelio Ledesma Ruíz
dc.creatorJurgen Mahlknecht
dc.date2014
dc.date.accessioned2018-10-18T22:08:22Z
dc.date.available2018-10-18T22:08:22Z
dc.descriptionNitrate isotopic values are often used as a tool to understand sources of contamination in order to effectively manage groundwater quality. However, recent literature describes that biogeochemical reactions may modify these values. Therefore, data interpretation is difficult and often vague. We provide a discussion on this topic and complement the study using halides as comparative tracers assessing an aquifer underneath a sub-humid to humid region in NE Mexico. Hydrogeological information and stable water isotopes indicate that active groundwater recharge occurs in the 8000km2 study area under present-day climatic and hydrologic conditions. Nitrate isotopes and halide ratios indicate a diverse mix of nitrate sources and transformations. Nitrate sources include organic waste and wastewater, synthetic fertilizers and soil processes. Animal manure and sewage from septic tanks were the causes of groundwater nitrate pollution within orchards and vegetable agriculture. Dairy activities within a radius of 1000m from a sampling point significantly contributed to nitrate pollution. Leachates from septic tanks caused nitrate pollution in residential areas. Soil nitrogen and animal waste were the sources of nitrate in groundwater under shrubland and grassland. Partial denitrification processes helped to attenuate nitrate concentration underneath agricultural lands and grassland, especially during summer months. © 2013 The Authors.
dc.identifier.doi10.1016/j.scitotenv.2013.10.043
dc.identifier.endpage864
dc.identifier.issn489697
dc.identifier.startpage855
dc.identifier.urihttp://hdl.handle.net/11285/630569
dc.identifier.volume470-471
dc.languageeng
dc.publisherElsevier
dc.relationhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84887140617&doi=10.1016%2fj.scitotenv.2013.10.043&partnerID=40&md5=7922beb05ad9eb8ccaf3d060bb7ceac9
dc.relationInvestigadores
dc.relationEstudiantes
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.sourceScience of the Total Environment
dc.subjectAgricultural wastes
dc.subjectAgriculture
dc.subjectAquifers
dc.subjectData processing
dc.subjectDenitrification
dc.subjectGroundwater
dc.subjectGroundwater pollution
dc.subjectGroundwater resources
dc.subjectIsotopes
dc.subjectNitrates
dc.subjectPollution
dc.subjectSeptic tanks
dc.subjectSewage
dc.subjectWater quality
dc.subjectBiogeochemical reactions
dc.subjectDenitrification process
dc.subjectGround-water qualities
dc.subjectGroundwater nitrate pollutions
dc.subjectHalides
dc.subjectHydrogeological informations
dc.subjectMe-xico
dc.subjectTracer
dc.subjectRecharging (underground waters)
dc.subjectdissolved oxygen
dc.subjectground water
dc.subjecthalide
dc.subjectnitrate
dc.subjectsurface water
dc.subjectagricultural land
dc.subjectaquifer
dc.subjectdenitrification
dc.subjectenvironmental fate
dc.subjectgroundwater pollution
dc.subjecthydrogeology
dc.subjectisotopic analysis
dc.subjectnitrate
dc.subjectpollutant source
dc.subjectrecharge
dc.subjecttracer
dc.subjectwater quality
dc.subjectagricultural land
dc.subjectalkalinity
dc.subjectaquifer
dc.subjectarticle
dc.subjectatomic emission spectrometry
dc.subjectbiogeochemistry
dc.subjectdenitrification
dc.subjectelectric conductivity
dc.subjectenvironmental monitoring
dc.subjectenvironmental protection
dc.subjectgrassland
dc.subjecthumidity
dc.subjecthydrology
dc.subjectmanure
dc.subjectorganic waste
dc.subjectpH
dc.subjectpriority journal
dc.subjectrural area
dc.subjectscrub
dc.subjectsoil analysis
dc.subjectsoil property
dc.subjectsoil treatment
dc.subjectsummer
dc.subjecttemperature
dc.subjectMexico [North America]
dc.subjectAnimalia
dc.subjectDenitrification
dc.subjectGroundwater
dc.subjectHalides
dc.subjectIsotopes
dc.subjectMexico
dc.subjectNitrate
dc.subjectTracer
dc.subjectAgriculture
dc.subjectEnvironmental Monitoring
dc.subjectFertilizers
dc.subjectGroundwater
dc.subjectMexico
dc.subjectNitrates
dc.subjectNitrogen Isotopes
dc.subjectWater Pollutants, Chemical
dc.subject.classification7 INGENIERÍA Y TECNOLOGÍA
dc.titleAssessment of sources and fate of nitrate in shallow groundwater of an agricultural area by using a multi-tracer approach
dc.typeArtículo
refterms.dateFOA2018-10-18T22:08:22Z

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