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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/52194
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dc.creatorRicardo Hiratapt_BR
dc.creatorReginaldo Bertolopt_BR
dc.creatorFabiana Cagnonpt_BR
dc.creatorAline Bernicept_BR
dc.creatorCarlos Maldanerpt_BR
dc.creatorPaulo Henrique Ferreira Galvãopt_BR
dc.creatorCarlos Henrique Gil Marquespt_BR
dc.creatorRafael Teradapt_BR
dc.creatorCláudia Varnierpt_BR
dc.creatorCathryn Ryanpt_BR
dc.date.accessioned2023-04-18T21:21:56Z-
dc.date.available2023-04-18T21:21:56Z-
dc.date.issued2020-
dc.citation.volume12pt_BR
dc.citation.issue10pt_BR
dc.citation.spage1pt_BR
dc.citation.epage20pt_BR
dc.identifier.doi10.3390/w1210270pt_BR
dc.identifier.issn20734441pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/52194-
dc.description.resumoThisstudyfollowsthegeochemistryofnitrogeninaCretaceousandunconfinedsedimentary aquiferinthecityofUrânia(Brazil)over20years. Althoughthesewernetworkwasbuiltinthe1970s, thenitratecontaminationproblem(>45mg/L-NO3−)persiststothisday. Theoldesturbanizationareas locatedinthenorthofthecityinitiallyusedcesspitsforwastewaterandcurrentlypresentthehighest nitrateconcentrations(>120mg/L-NO3−),withtheplumereachingthedeeperaquiferportions(upto 100m). Thecontaminationisnotasdramaticinthesouthpartofthecity,whereurbanizationincluding installationofthesewagenetworkwithPVCpipesthataremoreresistanttoleakthantheoldceramic networks occurred after 1985. Based on the constructive well profiles, three hydrogeochemical zones were established: shallow (<20 m deep), with average nitrate of 63 mg/L-NO3−; intermediate (20–60 m), with 30 mg/L-NO3−; and deep (>60 m), with 17 mg/L-NO3−. The current total nitrate mass in the aquifer exceeds 731 kg-NO3−. Numerical flow (Modflow) and transport (MT3D) model scenarios support the hypothesis that the nitrate contamination is caused by substantial infiltration of nitrogen through the cesspits until the 1970s, but after the 1990s, leaks from the sewer network should be responsible for the maintenance of the recently observed high concentrations of nitrate.pt_BR
dc.languageporpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentIGC - DEPARTAMENTO DE GEOLOGIApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofWaterpt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectNitratept_BR
dc.subjectGroundwater contaminationpt_BR
dc.subjectUrban hydrogeologypt_BR
dc.subjectUrban aquifer rechargept_BR
dc.subject.otherRecursos hídricospt_BR
dc.subject.otherCaracterização hidrogeológicapt_BR
dc.titleNitrate Contamination in Brazilian Urban Aquifers: a Tenacious Problempt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttp://https://www.mdpi.com/2073-4441/12/10/2709/htmdoi:10.3390/w1210270pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-9683-1244pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-5611-5059pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-7262-2971pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-1397-7043pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-5321-426Xpt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-6987-5938pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-3607-1703pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-8117-3525pt_BR
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