Caracteriza??o hidroqu?mica de ?guas subterr?neas aliada ao uso de ?xido de grafeno reduzido para adsor??o de herbicidas

Detalhes bibliográficos
Ano de defesa: 2019
Autor(a) principal: Soares, Gabriela Borges lattes
Orientador(a): Basso, Nara Regina de Souza lattes
Banca de defesa: Não Informado pela instituição
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Pontif?cia Universidade Cat?lica do Rio Grande do Sul
Programa de Pós-Graduação: Programa de P?s-Gradua??o em Engenharia e Tecnologia de Materiais
Departamento: Escola Polit?cnica
País: Brasil
Palavras-chave em Português:
?gua Subterr?nea
Herbicidas
Adsor??o
?xido de Grafeno Reduzido
Palavras-chave em Inglês:
Underground Water
Herbicides
Adsorption
Reduced Graphene Oxide
Área do conhecimento CNPq:
ENGENHARIAS
Link de acesso: http://tede2.pucrs.br/tede2/handle/tede/8909
Resumo: Studies of groundwater are becoming more frequent as drinking water shortages are increasing. The current study aims to analyze groundwater physicochemical parameters, to investigate the presence of herbicides glyphosate, imazethapyr and 2,4-dichlorophenoxyacetic acid (also known as 2,4-D), besides evaluating the efficiency of the use of reduced graphene oxide (rGO) in the removal of these herbicides from water. Groundwater of Alegrete, Agudo, Dona Francisca, Faxinal do Soturno, Nova Palma and Santa Cruz do Sul - RS municipalities were characterized. Adsorption tests of the herbicides were carried out in water using rGO. When considering the adsorption test results, it can be stated that the rGO was efficient in the simultaneous adsorption of the herbicides imazetapir and 2,4-D, reaching values of 93% and 99% of removal, respectively. Overall, 58 well samples were collected and analyzed in duplicate at different times of the year. The maximum residue levels (MRL) were used as reference limits by the Consolidation Ordinance No. 005/2017 and the CONAMA Resolution 396/2008. One well had a high concentration of glyphosate. Concentrations above the MRL for fluoride were found in eleven wells. One well surpassed MRL for nitrate. Four wells had concentrations above the MRL for sodium. For the arsenic concentrations above the MRL were found in four wells, for the selenium three wells had concentrations above the MRL. Most samples, 42 wells, presented all the chemical parameters within the MRL. Therefore, 16 wells had one or more parameters above MRL, indicating the need for greater attention in the hydrochemical aspect for human consumption.
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spelling Basso, Nara Regina de Souzahttp://lattes.cnpq.br/9015401653501831Moura, C?ssio Steinhttp://lattes.cnpq.br/6773545648390942http://lattes.cnpq.br/0534704137287120Soares, Gabriela Borges2019-10-02T13:18:29Z2019-03-18http://tede2.pucrs.br/tede2/handle/tede/8909Studies of groundwater are becoming more frequent as drinking water shortages are increasing. The current study aims to analyze groundwater physicochemical parameters, to investigate the presence of herbicides glyphosate, imazethapyr and 2,4-dichlorophenoxyacetic acid (also known as 2,4-D), besides evaluating the efficiency of the use of reduced graphene oxide (rGO) in the removal of these herbicides from water. Groundwater of Alegrete, Agudo, Dona Francisca, Faxinal do Soturno, Nova Palma and Santa Cruz do Sul - RS municipalities were characterized. Adsorption tests of the herbicides were carried out in water using rGO. When considering the adsorption test results, it can be stated that the rGO was efficient in the simultaneous adsorption of the herbicides imazetapir and 2,4-D, reaching values of 93% and 99% of removal, respectively. Overall, 58 well samples were collected and analyzed in duplicate at different times of the year. The maximum residue levels (MRL) were used as reference limits by the Consolidation Ordinance No. 005/2017 and the CONAMA Resolution 396/2008. One well had a high concentration of glyphosate. Concentrations above the MRL for fluoride were found in eleven wells. One well surpassed MRL for nitrate. Four wells had concentrations above the MRL for sodium. For the arsenic concentrations above the MRL were found in four wells, for the selenium three wells had concentrations above the MRL. Most samples, 42 wells, presented all the chemical parameters within the MRL. Therefore, 16 wells had one or more parameters above MRL, indicating the need for greater attention in the hydrochemical aspect for human consumption.Estudos sobre ?guas subterr?neas est?o se tornando mais frequentes, visto que a escassez de ?gua pot?vel vem aumentando. O corrente estudo tem como prop?sito analisar par?metros f?sico-qu?micos de ?guas subterr?neas, investigar presen?a dos herbicidas glifosato, imazetapir e ?cido 2,4-diclorofenoxiac?tico (tamb?m conhecido como 2,4-D), al?m de avaliar a efici?ncia do uso de ?xido de grafeno reduzido (OGR) na remo??o desses herbicidas de ?guas contaminadas. Foram caracterizadas ?guas subterr?neas dos munic?pios de Alegrete, Agudo, Dona Francisca, Faxinal do Soturno, Nova Palma e Santa Cruz do Sul - RS. Foram realizados ensaios de adsor??o dos herbicidas em ?guas contaminadas usando OGR. Ao considerar os resultados dos ensaios de adsor??o, pode-se afirmar que o OGR foi eficiente na adsor??o simult?nea dos herbicidas imazetapir e 2,4-D, atingindo valores de 93 % e 99 % de remo??o, respectivamente. No total, foram coletadas e analisadas 58 amostras de po?os em duplicada, em ?pocas diferentes do ano. Serviram de limites de refer?ncia os valores m?ximos permitidos (VMP) pela Portaria de Consolida??o n? 005/2017 e pela Resolu??o CONAMA 396/2008. Um po?o apresentou elevada concentra??o de glifosato. Foram encontradas concentra??es acima do VMP para fluoreto em onze po?os. Um po?o ultrapassou o VMP para nitrato. Quatro po?os apresentaram concentra??es acima do VMP para s?dio. Para o ars?nio foram encontradas concentra??es acima do VMP em quatro po?os, para o sel?nio tr?s po?os obtiveram concentra??es acima do VMP. A maioria das amostras, 42 po?os, apresentaram todos os par?metros qu?micos dentro do VMP. Por conseguinte, 16 po?os apresentaram um ou mais par?metros acima do VMP, indicando a necessidade de maior aten??o no quesito hidroqu?mico para o consumo humano.Submitted by PPG Engenharia e Tecnologia de Materiais (engenharia.pg.materiais@pucrs.br) on 2019-09-25T20:24:18Z No. of bitstreams: 1 TESE GABRIELA BORGES SOARES.pdf: 11932785 bytes, checksum: ff487cb432f6963b2d5a18602c0ba7d9 (MD5)Approved for entry into archive by Sarajane Pan (sarajane.pan@pucrs.br) on 2019-10-02T13:07:18Z (GMT) No. of bitstreams: 1 TESE GABRIELA BORGES SOARES.pdf: 11932785 bytes, checksum: ff487cb432f6963b2d5a18602c0ba7d9 (MD5)Made available in DSpace on 2019-10-02T13:18:29Z (GMT). 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dc.title.por.fl_str_mv Caracteriza??o hidroqu?mica de ?guas subterr?neas aliada ao uso de ?xido de grafeno reduzido para adsor??o de herbicidas
title Caracteriza??o hidroqu?mica de ?guas subterr?neas aliada ao uso de ?xido de grafeno reduzido para adsor??o de herbicidas
spellingShingle Caracteriza??o hidroqu?mica de ?guas subterr?neas aliada ao uso de ?xido de grafeno reduzido para adsor??o de herbicidas
Soares, Gabriela Borges
?gua Subterr?nea
Herbicidas
Adsor??o
?xido de Grafeno Reduzido
Underground Water
Herbicides
Adsorption
Reduced Graphene Oxide
ENGENHARIAS
title_short Caracteriza??o hidroqu?mica de ?guas subterr?neas aliada ao uso de ?xido de grafeno reduzido para adsor??o de herbicidas
title_full Caracteriza??o hidroqu?mica de ?guas subterr?neas aliada ao uso de ?xido de grafeno reduzido para adsor??o de herbicidas
title_fullStr Caracteriza??o hidroqu?mica de ?guas subterr?neas aliada ao uso de ?xido de grafeno reduzido para adsor??o de herbicidas
title_full_unstemmed Caracteriza??o hidroqu?mica de ?guas subterr?neas aliada ao uso de ?xido de grafeno reduzido para adsor??o de herbicidas
title_sort Caracteriza??o hidroqu?mica de ?guas subterr?neas aliada ao uso de ?xido de grafeno reduzido para adsor??o de herbicidas
author Soares, Gabriela Borges
author_facet Soares, Gabriela Borges
author_role author
dc.contributor.advisor1.fl_str_mv Basso, Nara Regina de Souza
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/9015401653501831
dc.contributor.advisor-co1.fl_str_mv Moura, C?ssio Stein
dc.contributor.advisor-co1Lattes.fl_str_mv http://lattes.cnpq.br/6773545648390942
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/0534704137287120
dc.contributor.author.fl_str_mv Soares, Gabriela Borges
contributor_str_mv Basso, Nara Regina de Souza
Moura, C?ssio Stein
dc.subject.por.fl_str_mv ?gua Subterr?nea
Herbicidas
Adsor??o
?xido de Grafeno Reduzido
topic ?gua Subterr?nea
Herbicidas
Adsor??o
?xido de Grafeno Reduzido
Underground Water
Herbicides
Adsorption
Reduced Graphene Oxide
ENGENHARIAS
dc.subject.eng.fl_str_mv Underground Water
Herbicides
Adsorption
Reduced Graphene Oxide
dc.subject.cnpq.fl_str_mv ENGENHARIAS
description Studies of groundwater are becoming more frequent as drinking water shortages are increasing. The current study aims to analyze groundwater physicochemical parameters, to investigate the presence of herbicides glyphosate, imazethapyr and 2,4-dichlorophenoxyacetic acid (also known as 2,4-D), besides evaluating the efficiency of the use of reduced graphene oxide (rGO) in the removal of these herbicides from water. Groundwater of Alegrete, Agudo, Dona Francisca, Faxinal do Soturno, Nova Palma and Santa Cruz do Sul - RS municipalities were characterized. Adsorption tests of the herbicides were carried out in water using rGO. When considering the adsorption test results, it can be stated that the rGO was efficient in the simultaneous adsorption of the herbicides imazetapir and 2,4-D, reaching values of 93% and 99% of removal, respectively. Overall, 58 well samples were collected and analyzed in duplicate at different times of the year. The maximum residue levels (MRL) were used as reference limits by the Consolidation Ordinance No. 005/2017 and the CONAMA Resolution 396/2008. One well had a high concentration of glyphosate. Concentrations above the MRL for fluoride were found in eleven wells. One well surpassed MRL for nitrate. Four wells had concentrations above the MRL for sodium. For the arsenic concentrations above the MRL were found in four wells, for the selenium three wells had concentrations above the MRL. Most samples, 42 wells, presented all the chemical parameters within the MRL. Therefore, 16 wells had one or more parameters above MRL, indicating the need for greater attention in the hydrochemical aspect for human consumption.
publishDate 2019
dc.date.accessioned.fl_str_mv 2019-10-02T13:18:29Z
dc.date.issued.fl_str_mv 2019-03-18
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dc.publisher.none.fl_str_mv Pontif?cia Universidade Cat?lica do Rio Grande do Sul
dc.publisher.program.fl_str_mv Programa de P?s-Gradua??o em Engenharia e Tecnologia de Materiais
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dc.publisher.country.fl_str_mv Brasil
dc.publisher.department.fl_str_mv Escola Polit?cnica
publisher.none.fl_str_mv Pontif?cia Universidade Cat?lica do Rio Grande do Sul
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