Nitrate Contamination in Brazilian Urban Aquifers: a Tenacious Problem

Página do item simplificado
dc.creatorRicardo Hirata
dc.creatorReginaldo Bertolo
dc.creatorFabiana Cagnon
dc.creatorAline Bernice
dc.creatorCarlos Maldaner
dc.creatorPaulo Henrique Ferreira Galvão
dc.creatorCarlos Henrique Gil Marques
dc.creatorRafael Terada
dc.creatorCláudia Varnier
dc.creatorCathryn Ryan
dc.date.accessioned2023-04-18T21:21:56Z
dc.date.accessioned2025-09-09T00:56:03Z
dc.date.available2023-04-18T21:21:56Z
dc.date.issued2020
dc.identifier.doi10.3390/w1210270
dc.identifier.issn20734441
dc.identifier.urihttps://hdl.handle.net/1843/52194
dc.languagepor
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofWater
dc.rightsAcesso Aberto
dc.subjectRecursos hídricos
dc.subjectCaracterização hidrogeológica
dc.subject.otherNitrate
dc.subject.otherGroundwater contamination
dc.subject.otherUrban hydrogeology
dc.subject.otherUrban aquifer recharge
dc.titleNitrate Contamination in Brazilian Urban Aquifers: a Tenacious Problem
dc.typeArtigo de periódico
local.citation.epage20
local.citation.issue10
local.citation.spage1
local.citation.volume12
local.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.
local.identifier.orcidhttps://orcid.org/0000-0001-9683-1244
local.identifier.orcidhttps://orcid.org/0000-0001-5611-5059
local.identifier.orcidhttps://orcid.org/0000-0002-7262-2971
local.identifier.orcidhttps://orcid.org/0000-0002-1397-7043
local.identifier.orcidhttps://orcid.org/0000-0002-5321-426X
local.identifier.orcidhttps://orcid.org/0000-0001-6987-5938
local.identifier.orcidhttps://orcid.org/0000-0002-3607-1703
local.identifier.orcidhttps://orcid.org/0000-0001-8117-3525
local.publisher.countryBrasil
local.publisher.departmentIGC - DEPARTAMENTO DE GEOLOGIA
local.publisher.initialsUFMG
local.url.externahttp://https://www.mdpi.com/2073-4441/12/10/2709/htmdoi:10.3390/w1210270

Arquivos

Pacote original

Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
Nitrate Contamination in Brazilian Urban Aquifers A Tenacious Problem.pdf
Tamanho:
37.7 MB
Formato:
Adobe Portable Document Format
Baixar

Licença do pacote

Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
License.txt
Tamanho:
1.99 KB
Formato:
Plain Text
Descrição:
Baixar

Coleções

Artigo de Periódico

Logo UFMG