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| Registros recuperados : 8 | |
| 1. |  | PINTO, D. M.; DRUCKER, D. P.; SIMÕES, M.; ESQUERDO, J. C. D. M.; DART, R. de O.; RASCHE, F.; FORTALEZA, J. M.; CUSTODIO, D. de O.; BERTIN, P. R. B. Estado da arte da gestão do GEOINFO: infraestrutura de dados espaciais da Embrapa. In: SIMPÓSIO BRASILEIRO DE INFRAESTRUTURA DE DADOS ESPACIAIS, 2., 2020, Rio de Janeiro. Anais... Rio de Janeiro: IBGE, 2020. 3 p.| Biblioteca(s): Embrapa Florestas. |
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| 2. | | PINTO, D. M.; BRANDÃO, S. V. V. dos; DRUCKER, D. P.; DOMPIERI, M. H. G.; RASCHE, F.; HOLLER, W. A.; BETTIOL, G. M.; CUSTODIO, D. de O.; VICTORIA, D. de C.; GONCALVES, L. de M. P. B. Descrição dos dados da pesquisa geoespacial: a experiência da Embrapa. Reciis: Revista Eletrônica de Comunicação, Informação & Inovação em Saúde, Rio de Janeiro, v. 11, p. 1-16, 2017. Suplemento. Trabalhos apresentados na 8a Conferência Luso Brasileira sobre Acesso Aberto - ConfOA. Na publicação: Davi Oliveira Custódio, Bibiana Teixeira Almeida, Margareth Simões, Gustavo Bayma-Silva.| Biblioteca(s): Embrapa Amazônia Oriental; Embrapa Florestas; Embrapa Tabuleiros Costeiros; Embrapa Territorial. |
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| 3. | | PINTO, D. M.; DRUCKER, D. P.; ESQUERDO, J. C. D. M.; FORTALEZA, J. M.; SIMÕES, M.; RASCHE, F.; DART, R. de O.; BERTIN, P. R. B.; CUSTODIO, D. de O. GeoInfo: repositório de dados espaciais da Embrapa. In: MIRANDA, A. C. D.; OLIVEIRA, A. A.; QUEIROZ, C. F. de; ARAUJO, L. D. de (org.). Repositórios: visão e experiência. Rio de Janeiro: Fiocruz, 2023. v. 1, p. 188-199.| Biblioteca(s): Embrapa Agricultura Digital; Embrapa Agroenergia; Embrapa Florestas; Embrapa Solos; Embrapa Territorial; Embrapa Unidades Centrais. |
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| 4. | | DRUCKER, D. P.; VICTORIA, D. de C.; FIDALGO, E. C. C.; SIMÕES, M.; BERTIN, P. R. B.; PINTO, D. M.; SILVA, A. C. da; DOMPIERI, M.; RASCHE, F.; CUSTODIO, D. de O. Challenges for the sustainability and evolution of a spatial data digital repository on agricultural research. In: INTERNATIONAL DATA WEEK; THE INTERNATIONAL CONFERENCE FOR SCRUTINY AND DISCUSSION OF THE FRONTIER ISSUES OF DATA IN RESEARCH; PLENARY MEETING OF THE RESEARCH DATA ALLIANCE, 12., 2018, Gaborone. The digital frontiers of global science. Gaborone: CODATA, 2018. Não paginado. IDW 2018. SciDataCon 2018. RDA Plenary Meeting 2018.| Biblioteca(s): Embrapa Florestas. |
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| 5. | | PINTO, D. M.; DRUCKER, D. P.; SIMÕES, M.; ESQUERDO, J. C. D. M.; DART, R. de O.; MARQUES, J. M. DOS S.; RASCHE, F.; FORTALEZA, J. M.; CUSTODIO, D. de O. Tipologias de dados espaciais na Embrapa: uma proposta conceitual para a sua IDE- GEOINFO. In: SIMPÓSIO BRASILEIRO DE INFRAESTRUTURA DE DADOS ESPACIAIS, 2., 2020, Rio de Janeiro. Anais... Rio de Janeiro: IBGE, 2020. 3 p.| Biblioteca(s): Embrapa Florestas. |
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| 6. | | DART, R. de O.; PINTO, D. M.; MOTA, C.; AMORIM, A.; SIMÕES, M.; DRUCKER, D. P.; CRISCUOLO, C.; CUSTODIO, D. de O.; BORBA, R.; GOVEIA, S. S.; GRIGOLIN, G.; CAMBOIM, S.; LANDAU, E. C.; GARRASTAZU, M. C.; SILVA, M. F. da; BERTIN, P. R. B. GeoNode-BR: comunidade brasileira para a colaboração entre usuários do software GeoNode. In: SIMPÓSIO BRASILEIRO DE INFRAESTRUTURA DE DADOS ESPACIAIS, 3., 2022. Geoinformação aberta para o desenvolvimento sustentável: anais. Rio de Janeiro: IBGE, 2022. p. 185-187. Evento online.| Biblioteca(s): Embrapa Florestas; Embrapa Solos. |
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| 7. | | PINTO, D. M.; RODRIGUES, G. S.; CASTRO, G. S. A.; VILELA, G. F.; MENDES, A. M.; NOGUEIRA JUNIOR, L. R.; BOGIANI, J. C.; ROCHA, J. D.; BERTIN, P. R. B.; DRUCKER, D. P.; SIMÕES, M.; ESQUERDO, J. C. D. M.; CUSTODIO, D. de O.; RASCHE, F.; DART, R. de O. GeoInfo: impactos sociais do repositório de dados de pesquisa da Embrapa. In: CONFERÊNCIA LUSO-BRASILEIRA CIÊNCIA ABERTA, 11., 2020, Braga, Portugal. Anais... Braga: Universidade do Minho, 2020. 4 p.| Biblioteca(s): Embrapa Florestas. |
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| 8. | | DRUCKER, D. P.; PINTO, D. M.; FIDALGO, E. C. C.; CUSTÓDIO, D. de O.; VICTORIA, D. de C.; ALMEIDA, B. T. de; SIMÕES, M.; MACHADO, C. R. de L.; SANTOS, V. V. dos; DART, R. de O.; AGLIO, M. L. D.; RASCHE, F.; LAFORET, M. R. C.; BETTIOL, G. M.; PEREIRA, S. E. M.; BRANDÃO, Z. N.; GARRASTAZU, M. C.; FILIPPINI ALBA, J. M.; COSTA, F. A. da; TORRES, R. C.; DOMPIERI, M. H. G.; SAMPAIO, S. M. N.; MARTINS, E. C.; PIEROZZI JUNIOR, I.; SILVA, G. B. S. da; GALINARI, G.; FIORINI, F. B.; TAKEMURA, C. M.; CRUZ, S. A. B. da; HOLLER, W. A.; OLIVEIRA, L. H. M. de. GeoInfo - infraestrutura de dados espaciais abertos para a pesquisa agropecuária. Reciis: Revista Eletrônica de Comunicação, Informação & Inovação em Saúde, Rio de Janeiro, v. 11, p. 1-17, 2017. Suplemento. Trabalhos apresentados na 8a Conferência Luso Brasileira sobre Acesso Aberto - ConfOA. Na publicação: Davi Oliveira Custódio, Bibiana Teixeira Almeida, Margareth Simões, Gustavo Bayma-Silva.| Biblioteca(s): Embrapa Florestas; Embrapa Meio Ambiente. |
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| Registros recuperados : 8 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
05/04/2017 |
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Data da última atualização: |
29/06/2017 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
COA, F.; CLEMENTE, Z.; LOPES, J. R.; RODRIGUES NETO, L. L.; ALVES, O. L.; CASTRO, V. L. S. S. de; BARBIERI, E.; MARTINEZ, D. S. T. |
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Afiliação: |
F. COA, CNPEM; Z. CLEMENTE, Bolsista; J. R. LOPES, CNPEM; L. L. RODRIGUES NETO, Unicamp; O. L. ALVES, Unicamp; VERA LUCIA SCHERHOLZ S DE CASTRO, CNPMA; E. BARBIERI, Instituto de Pesca; D. S. T. MARTINEZ, CNPEM. |
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Título: |
Green mecanochemical process for carbon nanotubes coating with humic acid: application and ecotoxicity evaluation. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
In: ENCONTRO ANUAL DA SOCIEDADE BRASILEIRA DE PESQUISA EM MATERIAIS, 15., 2016, Campinas. [Abstracts...] Rio de Janeiro: Sociedade Brasileira de Pesquisas em Materiais, 2016. Resumo B6SZ. |
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Idioma: |
Inglês |
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Conteúdo: |
Nanomaterials (NM) are promising for environmental remediation due to their unreleased properties such as high surface area and reactivity. Chemical oxidations (H2SO4/HNO3) have been applied to carbon NM in order to favor their application, but these are expensive and hazardous. In this work, industrial grade multiwalled carbon nanotubes (raw-MWCNT) were coated with humic acid (HA) by a ball milling processing (solid state). The aim was to apply a green mechanochemical process to improve the colloidal stability of MWCNTs and their removal capacity of metals. The HA-MWCNT complex was studied by atomic force microscope (AFM), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), dynamic light scattering (DLS), electrophoretic light scattering (ELS) and ultraviolet-visible spectroscopy (UV-Vis). Cu2+ sorption from water by HA-MWCNT, MWCNT-COOH and milledMWCNT were compared. Acute bioassays (96h) were performed with Daphnia magna exposed to 0.0; 0.1; 1.0; 5.0 and 10.0 mg/L of HA-MWCNT. Our results showed that the coating process enhanced the zeta potential of raw-MWCNT of -25.4±0.2 mV to -37.4±0.7 mV and reduced their hydrodynamic diameter of 393.2±27.3 nm to 212.5±5.6 nm in ultrapure water. AFM images of HA-MWCNT showed that it has an irregular surface, due to the humic acid coating. The complex was 4 times (84±1.8%) more efficient to remove Cu2+ than MWCNTCOOH (20.0±1.4%) and 11 times compared to milled-MWCNT (7.6±3.1%). The increases in Oxygen and the reductions in Carbon on surface of HA-MWCNT relative to raw-MWCNT and milled-MWCNT indicated the introduction of functional oxygenated groups on MWCNT. The HA-MWCNT did not show acute toxicity against D. magna. These results suggest that the coating changes the MWCNT surface, resulting in a material with potential to metal remediation, prepared without oxidizing acids and that did not show toxicity on D. magna. MenosNanomaterials (NM) are promising for environmental remediation due to their unreleased properties such as high surface area and reactivity. Chemical oxidations (H2SO4/HNO3) have been applied to carbon NM in order to favor their application, but these are expensive and hazardous. In this work, industrial grade multiwalled carbon nanotubes (raw-MWCNT) were coated with humic acid (HA) by a ball milling processing (solid state). The aim was to apply a green mechanochemical process to improve the colloidal stability of MWCNTs and their removal capacity of metals. The HA-MWCNT complex was studied by atomic force microscope (AFM), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), dynamic light scattering (DLS), electrophoretic light scattering (ELS) and ultraviolet-visible spectroscopy (UV-Vis). Cu2+ sorption from water by HA-MWCNT, MWCNT-COOH and milledMWCNT were compared. Acute bioassays (96h) were performed with Daphnia magna exposed to 0.0; 0.1; 1.0; 5.0 and 10.0 mg/L of HA-MWCNT. Our results showed that the coating process enhanced the zeta potential of raw-MWCNT of -25.4±0.2 mV to -37.4±0.7 mV and reduced their hydrodynamic diameter of 393.2±27.3 nm to 212.5±5.6 nm in ultrapure water. AFM images of HA-MWCNT showed that it has an irregular surface, due to the humic acid coating. The complex was 4 times (84±1.8%) more efficient to remove Cu2+ than MWCNTCOOH (20.0±1.4%) and 11 times compared to milled-MWCNT (7.6±3.1%). ... Mostrar Tudo |
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Palavras-Chave: |
Ecotoxicologia; Nantubes. |
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Categoria do assunto: |
W Química e Física |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/161193/1/2016RA-040.pdf
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Marc: |
LEADER 02763nam a2200217 a 4500
001 2068138
005 2017-06-29
008 2016 bl uuuu u00u1 u #d
100 1 $aCOA, F.
245 $aGreen mecanochemical process for carbon nanotubes coating with humic acid$bapplication and ecotoxicity evaluation.$h[electronic resource]
260 $aIn: ENCONTRO ANUAL DA SOCIEDADE BRASILEIRA DE PESQUISA EM MATERIAIS, 15., 2016, Campinas. [Abstracts...] Rio de Janeiro: Sociedade Brasileira de Pesquisas em Materiais, 2016. Resumo B6SZ.$c2016
520 $aNanomaterials (NM) are promising for environmental remediation due to their unreleased properties such as high surface area and reactivity. Chemical oxidations (H2SO4/HNO3) have been applied to carbon NM in order to favor their application, but these are expensive and hazardous. In this work, industrial grade multiwalled carbon nanotubes (raw-MWCNT) were coated with humic acid (HA) by a ball milling processing (solid state). The aim was to apply a green mechanochemical process to improve the colloidal stability of MWCNTs and their removal capacity of metals. The HA-MWCNT complex was studied by atomic force microscope (AFM), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), dynamic light scattering (DLS), electrophoretic light scattering (ELS) and ultraviolet-visible spectroscopy (UV-Vis). Cu2+ sorption from water by HA-MWCNT, MWCNT-COOH and milledMWCNT were compared. Acute bioassays (96h) were performed with Daphnia magna exposed to 0.0; 0.1; 1.0; 5.0 and 10.0 mg/L of HA-MWCNT. Our results showed that the coating process enhanced the zeta potential of raw-MWCNT of -25.4±0.2 mV to -37.4±0.7 mV and reduced their hydrodynamic diameter of 393.2±27.3 nm to 212.5±5.6 nm in ultrapure water. AFM images of HA-MWCNT showed that it has an irregular surface, due to the humic acid coating. The complex was 4 times (84±1.8%) more efficient to remove Cu2+ than MWCNTCOOH (20.0±1.4%) and 11 times compared to milled-MWCNT (7.6±3.1%). The increases in Oxygen and the reductions in Carbon on surface of HA-MWCNT relative to raw-MWCNT and milled-MWCNT indicated the introduction of functional oxygenated groups on MWCNT. The HA-MWCNT did not show acute toxicity against D. magna. These results suggest that the coating changes the MWCNT surface, resulting in a material with potential to metal remediation, prepared without oxidizing acids and that did not show toxicity on D. magna.
653 $aEcotoxicologia
653 $aNantubes
700 1 $aCLEMENTE, Z.
700 1 $aLOPES, J. R.
700 1 $aRODRIGUES NETO, L. L.
700 1 $aALVES, O. L.
700 1 $aCASTRO, V. L. S. S. de
700 1 $aBARBIERI, E.
700 1 $aMARTINEZ, D. S. T.
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Embrapa Meio Ambiente (CNPMA) |
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