Sensores eletroquímicos baseados em biocarvão e derivados de grafeno para a determinação de carbaril, carbendazim e paraquate em amostras de água e alimentos
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFS |
Texto Completo: | http://ri.ufs.br/jspui/handle/riufs/15823 |
Resumo: | Electrochemical sensors are devices able of recognizing and quantifying species of organic or inorganic nature, with the maximum possible specificity. In this way, these devices can be applied for the detection of pesticides in diverse complex samples. According to the above, the objective of this work was to develop modified electrodes based on biochar and graphene derivatives to obtain sensors and apply for voltammetric determination of the pesticides paraquat (PQ), carbendazim (CBZ), and carbaryl (CBR) in water and food samples. Biochar samples were obtained at 400 °C (B4), 500 °C (B5) and 600 °C (B6) from the biomass of the Eichhornia crassipes species, common known as water hyacinth. The biomass and biochar samples were characterized by different analysis techniques, and it was observed that the variation of the pyrolysis temperature promoted the formation of functional groups characteristic of the degradation of lignocellulosic biomass. The acid activation of the biochar samples resulted in the formation of more oxygen and nitrogen groups on the material surface, in addition to increasing the surface area. The syntheses of graphene derivatives (graphene oxide – GO and reduced graphene oxide – rGO) resulted in the formation of characteristic nanostructures, according to the morphology and structural composition of these materials. For the determination of PQ, an electrode modified with activated biochar (B4A) and rGO (E-rGO/B4A) was developed, and it was successfully applied to samples of coconut water, wastewater, lettuce, honey, and lemon juice, showing recovery values from 87.7% to 103.8%. The electrode modified with precursor biochar and rGO (E-rGO/B4) was applied sensitively and selectively for the CBZ determination in drinking water, wastewater, lettuce leaves, and orange juice samples. Two strategies were evaluated in the stages of pre-concentration and voltammetric measurements (insitu methodology and ex-situ methodology). The ex-situ methodology presented better analytical performance and the recovery values of the developed method ranged from 77.7% to 122.0%. A new analytical method was developed for the simultaneous determination of CBZ and CBR using the E-rGO/B4 electrode, however, it presented high detection limits (11.8 µmol L -1 ) and quantification (60.0 µmol L-1 ) for CBR, which makes it feasible to apply the electrode for determination of carbendazim in the presence of carbaryl. Thus, in this work, were developed and applied new electrochemical sensors based on water hyacinth biochar and graphene derivatives for sensitive and selective determinations of pesticides in samples of a complex nature. |
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Sant'Anna, Mércia Vieira da SilvaSussuchi, Eliana MidoriBergamini, Márcio Fernando2022-06-01T20:26:21Z2022-06-01T20:26:21Z2022-02-24SANT'ANNA, Mércia Vieira da Silva. Sensores eletroquímicos baseados em biocarvão e derivados de grafeno para a determinação de carbaril, carbendazim e paraquate em amostras de água e alimentos. 2022. 185 f. Tese (Doutorado em Química) - Universidade Federal de Sergipe, São Cristóvão, 2022.http://ri.ufs.br/jspui/handle/riufs/15823Electrochemical sensors are devices able of recognizing and quantifying species of organic or inorganic nature, with the maximum possible specificity. In this way, these devices can be applied for the detection of pesticides in diverse complex samples. According to the above, the objective of this work was to develop modified electrodes based on biochar and graphene derivatives to obtain sensors and apply for voltammetric determination of the pesticides paraquat (PQ), carbendazim (CBZ), and carbaryl (CBR) in water and food samples. Biochar samples were obtained at 400 °C (B4), 500 °C (B5) and 600 °C (B6) from the biomass of the Eichhornia crassipes species, common known as water hyacinth. The biomass and biochar samples were characterized by different analysis techniques, and it was observed that the variation of the pyrolysis temperature promoted the formation of functional groups characteristic of the degradation of lignocellulosic biomass. The acid activation of the biochar samples resulted in the formation of more oxygen and nitrogen groups on the material surface, in addition to increasing the surface area. The syntheses of graphene derivatives (graphene oxide – GO and reduced graphene oxide – rGO) resulted in the formation of characteristic nanostructures, according to the morphology and structural composition of these materials. For the determination of PQ, an electrode modified with activated biochar (B4A) and rGO (E-rGO/B4A) was developed, and it was successfully applied to samples of coconut water, wastewater, lettuce, honey, and lemon juice, showing recovery values from 87.7% to 103.8%. The electrode modified with precursor biochar and rGO (E-rGO/B4) was applied sensitively and selectively for the CBZ determination in drinking water, wastewater, lettuce leaves, and orange juice samples. Two strategies were evaluated in the stages of pre-concentration and voltammetric measurements (insitu methodology and ex-situ methodology). The ex-situ methodology presented better analytical performance and the recovery values of the developed method ranged from 77.7% to 122.0%. A new analytical method was developed for the simultaneous determination of CBZ and CBR using the E-rGO/B4 electrode, however, it presented high detection limits (11.8 µmol L -1 ) and quantification (60.0 µmol L-1 ) for CBR, which makes it feasible to apply the electrode for determination of carbendazim in the presence of carbaryl. Thus, in this work, were developed and applied new electrochemical sensors based on water hyacinth biochar and graphene derivatives for sensitive and selective determinations of pesticides in samples of a complex nature.Os sensores eletroquímicos são dispositivos capazes de reconhecer e quantificar espécies de natureza orgânica ou inorgânica, com a máxima especificidade possível. Dessa forma, esses dispositivos podem ser aplicados para a detecção de pesticidas em diversas amostras complexas. Frente ao exposto, o objetivo deste trabalho foi desenvolver eletrodos modificados à base de biocarvão e derivados de grafeno para a obtenção de sensores e aplicar para a determinação voltamétrica dos pesticidas paraquate (PQ), carbendazim (CBZ) e carbaril (CBR) em amostras de água e amostras de alimentos. As amostras de biocarvão foram obtidas a 400 °C (B4), 500 °C (B5) e 600 °C (B6) a partir da biomassa da espécie Eichhornia crassipes, mais conhecida por aguapé. A biomassa e as amostras de biocarvão foram caracterizadas por diversas técnicas de análise, e foi observado que a variação da temperatura de pirólise promoveu a formação de grupos funcionais característicos da degradação de biomassa lignocelulósica. A ativação ácida das amostras de biocarvão resultou na formação de mais grupamentos oxigenados e nitrogenados na superfície dos materiais, além de aumentar a área superficial. As sínteses dos derivados de grafeno (óxido de grafeno – GO e óxido de grafeno reduzido – rGO) resultaram na formação de nanoestruturas características, de acordo com a morfologia e composição estrutural que esses materiais apresentaram. Para a determinação de PQ, foi desenvolvido um eletrodo modificado com biocarvão ativado (B4A) e rGO (E-rGO/B4A), e foi aplicado a amostras de água de coco, água residual, alface, mel e suco de limão, apresentando valores de recuperações de 87,7% a 103,8%. O eletrodo modificado com biocarvão precursor e rGO (E-rGO/B4) foi aplicado de forma sensível e seletiva para a determinação de CBZ em amostras de água potável, água residual, folhas de alface e suco de laranja. Duas estratégias foram avaliadas nas etapas de pré-concentração e medidas voltamétricas (metodologia in-situ e metodologia ex-situ). A metodologia ex-situ apresentou melhor desempenho analítico e os valores de recuperação do método desenvolvido variaram de 77,7% a 122,0%. Um novo método analítico foi desenvolvido para a determinação simultânea de CBZ e CBR empregando o eletrodo E-rGO/B4, porém, apresentou altos limites de detecção (11,8 µmol L -1 ) e quantificação (60,0 µmol L -1 ) para o CBR, o que torna viável a aplicação do eletrodo para uma determinação de carbendazim na presença de carbaril. Dessa forma, neste trabalho foram desenvolvidos e aplicados novos sensores eletroquímicos à base de biocarvão de aguapé e derivados de grafeno para determinações sensíveis e seletivas de pesticidas em amostras de natureza complexa.Fundação de Apoio a Pesquisa e à Inovação Tecnológica do Estado de Sergipe - FAPITEC/SECoordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESSão CristóvãoporEletrodosDetectoresBiomassaCarvãoPesticidasEletrodos de pasta de carbonoMateriais carbonáceosCarbarilCarbendazimParaquateCarbon paste electrodesCarbonaceous materialsCarbarylCarbendazimParaquatCIENCIAS EXATAS E DA TERRA::QUIMICASensores eletroquímicos baseados em biocarvão e derivados de grafeno para a determinação de carbaril, carbendazim e paraquate em amostras de água e alimentosElectrochemical sensors based on biochar and graphene derivatives for determination of carbaryl, carbendazim and paraquat in water and food samplesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisPós-Graduação em QuímicaUniversidade Federal de Sergipereponame:Repositório Institucional da UFSinstname:Universidade Federal de Sergipe (UFS)instacron:UFSinfo:eu-repo/semantics/openAccessLICENSElicense.txtlicense.txttext/plain; charset=utf-81475https://ri.ufs.br/jspui/bitstream/riufs/15823/1/license.txt098cbbf65c2c15e1fb2e49c5d306a44cMD51ORIGINALMERCIA_VIEIRA_SILVA_SANTANNA.pdfMERCIA_VIEIRA_SILVA_SANTANNA.pdfapplication/pdf6828271https://ri.ufs.br/jspui/bitstream/riufs/15823/2/MERCIA_VIEIRA_SILVA_SANTANNA.pdf17ed6f0c9d1f3ffe2f261f3e563fe111MD52TEXTMERCIA_VIEIRA_SILVA_SANTANNA.pdf.txtMERCIA_VIEIRA_SILVA_SANTANNA.pdf.txtExtracted texttext/plain281845https://ri.ufs.br/jspui/bitstream/riufs/15823/3/MERCIA_VIEIRA_SILVA_SANTANNA.pdf.txta76594d5e970a7e2ec6ab18cff3f9457MD53THUMBNAILMERCIA_VIEIRA_SILVA_SANTANNA.pdf.jpgMERCIA_VIEIRA_SILVA_SANTANNA.pdf.jpgGenerated Thumbnailimage/jpeg1537https://ri.ufs.br/jspui/bitstream/riufs/15823/4/MERCIA_VIEIRA_SILVA_SANTANNA.pdf.jpg03f54d650f4ead4d6e49a658b9f40eeeMD54riufs/158232022-06-01 17:57:05.313oai:ufs.br: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Repositório InstitucionalPUBhttps://ri.ufs.br/oai/requestrepositorio@academico.ufs.bropendoar:2022-06-01T20:57:05Repositório Institucional da UFS - Universidade Federal de Sergipe (UFS)false |
dc.title.pt_BR.fl_str_mv |
Sensores eletroquímicos baseados em biocarvão e derivados de grafeno para a determinação de carbaril, carbendazim e paraquate em amostras de água e alimentos |
dc.title.alternative.eng.fl_str_mv |
Electrochemical sensors based on biochar and graphene derivatives for determination of carbaryl, carbendazim and paraquat in water and food samples |
title |
Sensores eletroquímicos baseados em biocarvão e derivados de grafeno para a determinação de carbaril, carbendazim e paraquate em amostras de água e alimentos |
spellingShingle |
Sensores eletroquímicos baseados em biocarvão e derivados de grafeno para a determinação de carbaril, carbendazim e paraquate em amostras de água e alimentos Sant'Anna, Mércia Vieira da Silva Eletrodos Detectores Biomassa Carvão Pesticidas Eletrodos de pasta de carbono Materiais carbonáceos Carbaril Carbendazim Paraquate Carbon paste electrodes Carbonaceous materials Carbaryl Carbendazim Paraquat CIENCIAS EXATAS E DA TERRA::QUIMICA |
title_short |
Sensores eletroquímicos baseados em biocarvão e derivados de grafeno para a determinação de carbaril, carbendazim e paraquate em amostras de água e alimentos |
title_full |
Sensores eletroquímicos baseados em biocarvão e derivados de grafeno para a determinação de carbaril, carbendazim e paraquate em amostras de água e alimentos |
title_fullStr |
Sensores eletroquímicos baseados em biocarvão e derivados de grafeno para a determinação de carbaril, carbendazim e paraquate em amostras de água e alimentos |
title_full_unstemmed |
Sensores eletroquímicos baseados em biocarvão e derivados de grafeno para a determinação de carbaril, carbendazim e paraquate em amostras de água e alimentos |
title_sort |
Sensores eletroquímicos baseados em biocarvão e derivados de grafeno para a determinação de carbaril, carbendazim e paraquate em amostras de água e alimentos |
author |
Sant'Anna, Mércia Vieira da Silva |
author_facet |
Sant'Anna, Mércia Vieira da Silva |
author_role |
author |
dc.contributor.author.fl_str_mv |
Sant'Anna, Mércia Vieira da Silva |
dc.contributor.advisor1.fl_str_mv |
Sussuchi, Eliana Midori |
dc.contributor.advisor-co1.fl_str_mv |
Bergamini, Márcio Fernando |
contributor_str_mv |
Sussuchi, Eliana Midori Bergamini, Márcio Fernando |
dc.subject.por.fl_str_mv |
Eletrodos Detectores Biomassa Carvão Pesticidas Eletrodos de pasta de carbono Materiais carbonáceos Carbaril Carbendazim Paraquate Carbon paste electrodes Carbonaceous materials Carbaryl Carbendazim Paraquat |
topic |
Eletrodos Detectores Biomassa Carvão Pesticidas Eletrodos de pasta de carbono Materiais carbonáceos Carbaril Carbendazim Paraquate Carbon paste electrodes Carbonaceous materials Carbaryl Carbendazim Paraquat CIENCIAS EXATAS E DA TERRA::QUIMICA |
dc.subject.cnpq.fl_str_mv |
CIENCIAS EXATAS E DA TERRA::QUIMICA |
description |
Electrochemical sensors are devices able of recognizing and quantifying species of organic or inorganic nature, with the maximum possible specificity. In this way, these devices can be applied for the detection of pesticides in diverse complex samples. According to the above, the objective of this work was to develop modified electrodes based on biochar and graphene derivatives to obtain sensors and apply for voltammetric determination of the pesticides paraquat (PQ), carbendazim (CBZ), and carbaryl (CBR) in water and food samples. Biochar samples were obtained at 400 °C (B4), 500 °C (B5) and 600 °C (B6) from the biomass of the Eichhornia crassipes species, common known as water hyacinth. The biomass and biochar samples were characterized by different analysis techniques, and it was observed that the variation of the pyrolysis temperature promoted the formation of functional groups characteristic of the degradation of lignocellulosic biomass. The acid activation of the biochar samples resulted in the formation of more oxygen and nitrogen groups on the material surface, in addition to increasing the surface area. The syntheses of graphene derivatives (graphene oxide – GO and reduced graphene oxide – rGO) resulted in the formation of characteristic nanostructures, according to the morphology and structural composition of these materials. For the determination of PQ, an electrode modified with activated biochar (B4A) and rGO (E-rGO/B4A) was developed, and it was successfully applied to samples of coconut water, wastewater, lettuce, honey, and lemon juice, showing recovery values from 87.7% to 103.8%. The electrode modified with precursor biochar and rGO (E-rGO/B4) was applied sensitively and selectively for the CBZ determination in drinking water, wastewater, lettuce leaves, and orange juice samples. Two strategies were evaluated in the stages of pre-concentration and voltammetric measurements (insitu methodology and ex-situ methodology). The ex-situ methodology presented better analytical performance and the recovery values of the developed method ranged from 77.7% to 122.0%. A new analytical method was developed for the simultaneous determination of CBZ and CBR using the E-rGO/B4 electrode, however, it presented high detection limits (11.8 µmol L -1 ) and quantification (60.0 µmol L-1 ) for CBR, which makes it feasible to apply the electrode for determination of carbendazim in the presence of carbaryl. Thus, in this work, were developed and applied new electrochemical sensors based on water hyacinth biochar and graphene derivatives for sensitive and selective determinations of pesticides in samples of a complex nature. |
publishDate |
2022 |
dc.date.accessioned.fl_str_mv |
2022-06-01T20:26:21Z |
dc.date.available.fl_str_mv |
2022-06-01T20:26:21Z |
dc.date.issued.fl_str_mv |
2022-02-24 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
SANT'ANNA, Mércia Vieira da Silva. Sensores eletroquímicos baseados em biocarvão e derivados de grafeno para a determinação de carbaril, carbendazim e paraquate em amostras de água e alimentos. 2022. 185 f. Tese (Doutorado em Química) - Universidade Federal de Sergipe, São Cristóvão, 2022. |
dc.identifier.uri.fl_str_mv |
http://ri.ufs.br/jspui/handle/riufs/15823 |
identifier_str_mv |
SANT'ANNA, Mércia Vieira da Silva. Sensores eletroquímicos baseados em biocarvão e derivados de grafeno para a determinação de carbaril, carbendazim e paraquate em amostras de água e alimentos. 2022. 185 f. Tese (Doutorado em Química) - Universidade Federal de Sergipe, São Cristóvão, 2022. |
url |
http://ri.ufs.br/jspui/handle/riufs/15823 |
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openAccess |
dc.publisher.program.fl_str_mv |
Pós-Graduação em Química |
dc.publisher.initials.fl_str_mv |
Universidade Federal de Sergipe |
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