DC resistivity investigation in a fractured aquifer system contaminated by leachate from an old dump

Detalhes bibliográficos
Autor(a) principal: Moreira, César Augusto [UNESP]
Data de Publicação: 2017
Outros Autores: Leandro, Carolina Gonçalves, Lopes, Camila Trindade, Ilha, Lenon Melo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://hdl.handle.net/11449/221034
Resumo: The dumps are areas of final disposal of solid wastes directly into the soil, with no technical criteria or collecting systems of gases or liquids. A large part of Brazilian municipalities have used this extreme damaging alternative to the environment up to the year 2010, when a federal law made compulsory the installation of sanitary landfills. However, large parts of the dumps were simply abandoned, although some eventually go through treatment after assessments of the state environmental agencies. This work presents the results of a geophysical investigation in a dump deactivated in 2004 in a small city in southern Brazil, where previous investigations have revealed contamination of soil and groundwater by leachate. Structural analyzes in the area of study combined to geological data from monitoring wells indicate the presence of contaminants in fractured granite, with a wide variation in the thickness of soil, saprolite and groundwater level. The integration of chemical analyses of the groundwater with electrical resistivity tomography (ERT) in 2D and 3D processing, revealed the existence of large contaminated areas within the limits of the dump flowing into the aquifer partially free up to 5m depth. Such areas may decrease gradually with the increase in depth and between 9m and 19m contaminated zones clearly predominate, associated with the flow in the fractured aquifer. The indication of restricted and oriented zones suggests the targeting and accumulation of contaminants in two systems of preferential fractures. The discovery of these zones is fundamental for planning and the installation of pumping and decontamination systems of groundwater, considering a declining production of leachate since the closure of the dump.
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spelling DC resistivity investigation in a fractured aquifer system contaminated by leachate from an old dumpContaminationElectric resistivity tomographyFractured aquiferLeachateOrganic matterThe dumps are areas of final disposal of solid wastes directly into the soil, with no technical criteria or collecting systems of gases or liquids. A large part of Brazilian municipalities have used this extreme damaging alternative to the environment up to the year 2010, when a federal law made compulsory the installation of sanitary landfills. However, large parts of the dumps were simply abandoned, although some eventually go through treatment after assessments of the state environmental agencies. This work presents the results of a geophysical investigation in a dump deactivated in 2004 in a small city in southern Brazil, where previous investigations have revealed contamination of soil and groundwater by leachate. Structural analyzes in the area of study combined to geological data from monitoring wells indicate the presence of contaminants in fractured granite, with a wide variation in the thickness of soil, saprolite and groundwater level. The integration of chemical analyses of the groundwater with electrical resistivity tomography (ERT) in 2D and 3D processing, revealed the existence of large contaminated areas within the limits of the dump flowing into the aquifer partially free up to 5m depth. Such areas may decrease gradually with the increase in depth and between 9m and 19m contaminated zones clearly predominate, associated with the flow in the fractured aquifer. The indication of restricted and oriented zones suggests the targeting and accumulation of contaminants in two systems of preferential fractures. The discovery of these zones is fundamental for planning and the installation of pumping and decontamination systems of groundwater, considering a declining production of leachate since the closure of the dump.Geosciences and Exact Sciences Institute Univ. Estadual Paulista, Av. 24-A, 1515, Bela VistaPampa Federal University - UNIPAMPA, Av. Pedro Anunciação, s/n Vila BatistaGeosciences and Exact Sciences Institute Univ. Estadual Paulista, Av. 24-A, 1515, Bela VistaUniversidade Estadual Paulista (UNESP)Pampa Federal University - UNIPAMPAMoreira, César Augusto [UNESP]Leandro, Carolina GonçalvesLopes, Camila TrindadeIlha, Lenon Melo2022-04-28T19:08:46Z2022-04-28T19:08:46Z2017-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article345-358Geofisica Internacional, v. 56, n. 4, p. 345-358, 2017.0016-7169http://hdl.handle.net/11449/2210342-s2.0-85043458692Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengGeofisica Internacionalinfo:eu-repo/semantics/openAccess2022-04-28T19:08:46Zoai:repositorio.unesp.br:11449/221034Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:42:55.183038Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv DC resistivity investigation in a fractured aquifer system contaminated by leachate from an old dump
title DC resistivity investigation in a fractured aquifer system contaminated by leachate from an old dump
spellingShingle DC resistivity investigation in a fractured aquifer system contaminated by leachate from an old dump
Moreira, César Augusto [UNESP]
Contamination
Electric resistivity tomography
Fractured aquifer
Leachate
Organic matter
title_short DC resistivity investigation in a fractured aquifer system contaminated by leachate from an old dump
title_full DC resistivity investigation in a fractured aquifer system contaminated by leachate from an old dump
title_fullStr DC resistivity investigation in a fractured aquifer system contaminated by leachate from an old dump
title_full_unstemmed DC resistivity investigation in a fractured aquifer system contaminated by leachate from an old dump
title_sort DC resistivity investigation in a fractured aquifer system contaminated by leachate from an old dump
author Moreira, César Augusto [UNESP]
author_facet Moreira, César Augusto [UNESP]
Leandro, Carolina Gonçalves
Lopes, Camila Trindade
Ilha, Lenon Melo
author_role author
author2 Leandro, Carolina Gonçalves
Lopes, Camila Trindade
Ilha, Lenon Melo
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (UNESP)
Pampa Federal University - UNIPAMPA
dc.contributor.author.fl_str_mv Moreira, César Augusto [UNESP]
Leandro, Carolina Gonçalves
Lopes, Camila Trindade
Ilha, Lenon Melo
dc.subject.por.fl_str_mv Contamination
Electric resistivity tomography
Fractured aquifer
Leachate
Organic matter
topic Contamination
Electric resistivity tomography
Fractured aquifer
Leachate
Organic matter
description The dumps are areas of final disposal of solid wastes directly into the soil, with no technical criteria or collecting systems of gases or liquids. A large part of Brazilian municipalities have used this extreme damaging alternative to the environment up to the year 2010, when a federal law made compulsory the installation of sanitary landfills. However, large parts of the dumps were simply abandoned, although some eventually go through treatment after assessments of the state environmental agencies. This work presents the results of a geophysical investigation in a dump deactivated in 2004 in a small city in southern Brazil, where previous investigations have revealed contamination of soil and groundwater by leachate. Structural analyzes in the area of study combined to geological data from monitoring wells indicate the presence of contaminants in fractured granite, with a wide variation in the thickness of soil, saprolite and groundwater level. The integration of chemical analyses of the groundwater with electrical resistivity tomography (ERT) in 2D and 3D processing, revealed the existence of large contaminated areas within the limits of the dump flowing into the aquifer partially free up to 5m depth. Such areas may decrease gradually with the increase in depth and between 9m and 19m contaminated zones clearly predominate, associated with the flow in the fractured aquifer. The indication of restricted and oriented zones suggests the targeting and accumulation of contaminants in two systems of preferential fractures. The discovery of these zones is fundamental for planning and the installation of pumping and decontamination systems of groundwater, considering a declining production of leachate since the closure of the dump.
publishDate 2017
dc.date.none.fl_str_mv 2017-10-01
2022-04-28T19:08:46Z
2022-04-28T19:08:46Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv Geofisica Internacional, v. 56, n. 4, p. 345-358, 2017.
0016-7169
http://hdl.handle.net/11449/221034
2-s2.0-85043458692
identifier_str_mv Geofisica Internacional, v. 56, n. 4, p. 345-358, 2017.
0016-7169
2-s2.0-85043458692
url http://hdl.handle.net/11449/221034
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Geofisica Internacional
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 345-358
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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