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Registro Completo |
Biblioteca(s): |
Embrapa Meio Ambiente. |
Data corrente: |
25/10/2017 |
Data da última atualização: |
25/10/2017 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
SILVA, G. H. da; CLEMENTE, Z.; COA, F.; RODRIGUES NETO, L. L.; KHAN, L. U.; CARVALHO, H. W. P.; CASTRO, V. L. S. S. de; MARTINEZ, D. S. T.; MONTEIRO, R. T. R. |
Afiliação: |
G. H. da SILVA; Z. CLEMENTE; F. COA; L. L. RODRIGUES NETO; L. U. KHAN; H. W. P. CARVALHO; VERA LUCIA SCHERHOLZ S DE CASTRO, CNPMA; D. S. T. MARTINEZ; R. T. R. MONTEIRO. |
Título: |
Nanoecotoxicity and uptake of TiO2@MWCNT hybrid material on Danio rerio embryos. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
In: BRAZILIAN MRS MEETING, 16., 2017, Gramado. Proceedings... Gramado: Sociedade Brasileira de Pesquisa em Materiais, 2017. Ref. Q.OR3.11. p. 384. |
Idioma: |
Inglês |
Conteúdo: |
A process that is being widely used for environmental remediation is photocatalysis. The use of nanotechnology can highly improve this field, and there is already a wide range of nanomaterials employed in photocatalytic research and applications. A material that has been highlighted in this field is the TiO2@MWCNT, this combination increase the photocatalytic efficiency, and therefore being an extremely effective method for remediation of contaminants. Due to the importance of these hybrid materials, the production of such particles has been encouraged. However, concerns about their toxicity and safety when released into the environment should be considered. Therefore, to understand the role of TiO2@MWCNT in the environment, our main objective was to study the photocatalytic activity and toxicity of TiO2@MWCNT composite on Danio rerio embryos (zebrafish). For this purpose, TiO2@MWCNT nanomaterial was synthetized, by mechanical mixing method, and an early life stage assay was performed with zebrafish embryos. The parameters assessed were acute toxicity, hatching rate, growth, yolk sac size, and the sarcomere length. In addition, we employed ?-probe X-ray fluorescence spectroscopy to observe if nanoparticles were being uptake by zebrafish larvae. Also, the photocatalytic efficiency of the TiO2@MWCNT was assessed through indigo blue dye degradation using UV-Vis spectroscopy. TiO2@MWCNT characterization was performed by SEM, TEM and TGA analysis. Our results shown that the preparation method was efficient to loaded the TiO2 on the surface of MWCNT, and the composite was more photocatalytic than TiO2. Besides, no acute toxicity, nor sublethal effects in Danio rerio embryos was observed until 100 mg L-1. Nevertheless, µ-XRF showed that the larvae were ingesting the nanoparticle. In conclusion, TiO2@MWCNT is a promising material for environmental remediation, presenting high efficiency and low toxicity. MenosA process that is being widely used for environmental remediation is photocatalysis. The use of nanotechnology can highly improve this field, and there is already a wide range of nanomaterials employed in photocatalytic research and applications. A material that has been highlighted in this field is the TiO2@MWCNT, this combination increase the photocatalytic efficiency, and therefore being an extremely effective method for remediation of contaminants. Due to the importance of these hybrid materials, the production of such particles has been encouraged. However, concerns about their toxicity and safety when released into the environment should be considered. Therefore, to understand the role of TiO2@MWCNT in the environment, our main objective was to study the photocatalytic activity and toxicity of TiO2@MWCNT composite on Danio rerio embryos (zebrafish). For this purpose, TiO2@MWCNT nanomaterial was synthetized, by mechanical mixing method, and an early life stage assay was performed with zebrafish embryos. The parameters assessed were acute toxicity, hatching rate, growth, yolk sac size, and the sarcomere length. In addition, we employed ?-probe X-ray fluorescence spectroscopy to observe if nanoparticles were being uptake by zebrafish larvae. Also, the photocatalytic efficiency of the TiO2@MWCNT was assessed through indigo blue dye degradation using UV-Vis spectroscopy. TiO2@MWCNT characterization was performed by SEM, TEM and TGA analysis. Our results shown that the prepa... Mostrar Tudo |
Palavras-Chave: |
Nanoecotoxicologia. |
Thesaurus Nal: |
Danio rerio. |
Categoria do assunto: |
W Química e Física |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/165540/1/RA-CastroVLSS-16BrazilMRSMeeting-2017-p384.pdf
|
Marc: |
LEADER 02716nam a2200229 a 4500 001 2078103 005 2017-10-25 008 2017 bl uuuu u00u1 u #d 100 1 $aSILVA, G. H. da 245 $aNanoecotoxicity and uptake of TiO2@MWCNT hybrid material on Danio rerio embryos.$h[electronic resource] 260 $aIn: BRAZILIAN MRS MEETING, 16., 2017, Gramado. Proceedings... Gramado: Sociedade Brasileira de Pesquisa em Materiais, 2017. Ref. Q.OR3.11. p. 384.$c2017 520 $aA process that is being widely used for environmental remediation is photocatalysis. The use of nanotechnology can highly improve this field, and there is already a wide range of nanomaterials employed in photocatalytic research and applications. A material that has been highlighted in this field is the TiO2@MWCNT, this combination increase the photocatalytic efficiency, and therefore being an extremely effective method for remediation of contaminants. Due to the importance of these hybrid materials, the production of such particles has been encouraged. However, concerns about their toxicity and safety when released into the environment should be considered. Therefore, to understand the role of TiO2@MWCNT in the environment, our main objective was to study the photocatalytic activity and toxicity of TiO2@MWCNT composite on Danio rerio embryos (zebrafish). For this purpose, TiO2@MWCNT nanomaterial was synthetized, by mechanical mixing method, and an early life stage assay was performed with zebrafish embryos. The parameters assessed were acute toxicity, hatching rate, growth, yolk sac size, and the sarcomere length. In addition, we employed ?-probe X-ray fluorescence spectroscopy to observe if nanoparticles were being uptake by zebrafish larvae. Also, the photocatalytic efficiency of the TiO2@MWCNT was assessed through indigo blue dye degradation using UV-Vis spectroscopy. TiO2@MWCNT characterization was performed by SEM, TEM and TGA analysis. Our results shown that the preparation method was efficient to loaded the TiO2 on the surface of MWCNT, and the composite was more photocatalytic than TiO2. Besides, no acute toxicity, nor sublethal effects in Danio rerio embryos was observed until 100 mg L-1. Nevertheless, µ-XRF showed that the larvae were ingesting the nanoparticle. In conclusion, TiO2@MWCNT is a promising material for environmental remediation, presenting high efficiency and low toxicity. 650 $aDanio rerio 653 $aNanoecotoxicologia 700 1 $aCLEMENTE, Z. 700 1 $aCOA, F. 700 1 $aRODRIGUES NETO, L. L. 700 1 $aKHAN, L. U. 700 1 $aCARVALHO, H. W. P. 700 1 $aCASTRO, V. L. S. S. de 700 1 $aMARTINEZ, D. S. T. 700 1 $aMONTEIRO, R. T. R.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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Registro Completo
Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
19/02/2013 |
Data da última atualização: |
19/03/2024 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
COSTA, R. R.; ROCHA, A. S.; ARAUJO, F. R.; SILVA, M. R.; GUIMARAES, M. D. C.; SUFFYS, P. N.; OLIVEIRA, V. M. |
Afiliação: |
ROSEANE MARIA RIBEIRO COSTA, PHEMIG; A. S. ROCHA, UFJF; F. R. ARAUJO, UFJF; MARCIO ROBERTO SILVA, CNPGL; M. D. C. GUIMARAES, FIOCRUZ; P. N. SUFFYS, FIOCRUZ; V. M. OLIVEIRA, LANAGRO. |
Título: |
Tuberculose zoonótica devida a Mybacterium bovis em Juiz de Fora, Minas Gerais, Brasil. |
Ano de publicação: |
2012 |
Fonte/Imprenta: |
Revista Médica de Minas Gerais, v. 22, supl. 2, p. S147, 2012. |
Idioma: |
Português |
Notas: |
Edição dos resumos do 3º Fórum Científico da Fundação Hospitalar do Estado de Minas Gerais, Juiz de Fora, 2012. |
Thesagro: |
Tuberculose. |
Categoria do assunto: |
H Saúde e Patologia |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/949808/1/Tuberculose-zoonotica-.pdf
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Marc: |
LEADER 00707nam a2200193 a 4500 001 1949808 005 2024-03-19 008 2012 bl uuuu u00u1 u #d 100 1 $aCOSTA, R. R. 245 $aTuberculose zoonótica devida a Mybacterium bovis em Juiz de Fora, Minas Gerais, Brasil.$h[electronic resource] 260 $aRevista Médica de Minas Gerais, v. 22, supl. 2, p. S147$c2012 500 $aEdição dos resumos do 3º Fórum Científico da Fundação Hospitalar do Estado de Minas Gerais, Juiz de Fora, 2012. 650 $aTuberculose 700 1 $aROCHA, A. S. 700 1 $aARAUJO, F. R. 700 1 $aSILVA, M. R. 700 1 $aGUIMARAES, M. D. C. 700 1 $aSUFFYS, P. N. 700 1 $aOLIVEIRA, V. M.
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