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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
06/04/2021 |
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Data da última atualização: |
10/06/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
OLIVEIRA, A. M. S.; PARIS, E. C.; GIRALDI, T. R. |
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Afiliação: |
ELAINE CRISTINA PARIS, CNPDIA. |
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Título: |
GIS zeolite obtained by the microwave-hydrothermal method: Synthesis and evaluation of its adsorptive capacity. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Materials Chemistry and Physics, v. 260, 124142, 2021. |
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Páginas: |
260?271 |
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ISSN: |
0254-0584 |
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DOI: |
https://doi.org/10.1016/j.matchemphys.2020.124142 R |
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Idioma: |
Inglês |
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Conteúdo: |
Developing synthetic routes that lead to the formation of zeolites with small porous systems, such as GIS zeolites, has attracted great interest since these structures have unique properties in catalysis and adsorption, but are still underused. In this study, GIS type zeolite nanoparticles were synthesized by the microwave-assisted hydrothermal method. Two synthesis routes were evaluated using two different silica precursor sources. Silicon dioxide was used in crystalline and amorphous forms. The material was characterized by X-ray diffraction (XRD), nitrogen physisorption, zeta potential (ZP), high-resolution scanning electron microscopy (SEM-FEG), highresolution transmission electron microscopy (HRTEM) and by energy dispersive X-ray spectroscopy (EDS). The obtained crystalline phase was the Na–P1 type zeolite (GIS structure). The BET surface area of the particles was 17 m2 /g and the average pore size was 4 nm. These zeolites were used for Mn(II) ions adsorption in aqueous medium. Considering the studied adsorption conditions, adsorption was higher at pH 8, using an adsorbent concentration of 1 g/L and with 30 min of contact time. The kinetic model that best described the process was the pseudo-second order model and the isotherm model that best fitted to the experimental data was the Langmuir model, which indicates adsorption in monolayers and high affinity between the adsorbate and the adsorbent. The maximum adsorption capacity was 44.05 mg/g. |
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Palavras-Chave: |
GIS zeolites; Manganese (II); Microwave synthesis. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02169naa a2200217 a 4500
001 2131082
005 2022-06-10
008 2021 bl uuuu u00u1 u #d
022 $a0254-0584
024 7 $ahttps://doi.org/10.1016/j.matchemphys.2020.124142 R$2DOI
100 1 $aOLIVEIRA, A. M. S.
245 $aGIS zeolite obtained by the microwave-hydrothermal method$bSynthesis and evaluation of its adsorptive capacity.$h[electronic resource]
260 $c2021
300 $a260?271
520 $aDeveloping synthetic routes that lead to the formation of zeolites with small porous systems, such as GIS zeolites, has attracted great interest since these structures have unique properties in catalysis and adsorption, but are still underused. In this study, GIS type zeolite nanoparticles were synthesized by the microwave-assisted hydrothermal method. Two synthesis routes were evaluated using two different silica precursor sources. Silicon dioxide was used in crystalline and amorphous forms. The material was characterized by X-ray diffraction (XRD), nitrogen physisorption, zeta potential (ZP), high-resolution scanning electron microscopy (SEM-FEG), highresolution transmission electron microscopy (HRTEM) and by energy dispersive X-ray spectroscopy (EDS). The obtained crystalline phase was the Na–P1 type zeolite (GIS structure). The BET surface area of the particles was 17 m2 /g and the average pore size was 4 nm. These zeolites were used for Mn(II) ions adsorption in aqueous medium. Considering the studied adsorption conditions, adsorption was higher at pH 8, using an adsorbent concentration of 1 g/L and with 30 min of contact time. The kinetic model that best described the process was the pseudo-second order model and the isotherm model that best fitted to the experimental data was the Langmuir model, which indicates adsorption in monolayers and high affinity between the adsorbate and the adsorbent. The maximum adsorption capacity was 44.05 mg/g.
653 $aGIS zeolites
653 $aManganese (II)
653 $aMicrowave synthesis
700 1 $aPARIS, E. C.
700 1 $aGIRALDI, T. R.
773 $tMaterials Chemistry and Physics$gv. 260, 124142, 2021.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
01/02/2017 |
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Data da última atualização: |
09/02/2017 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
COELHO, E. F.; QUEIROZ, L. de A.; SANTOS, L. F. B. dos; PADUA, T. R. P. de; SANTOS, V. T. dos. |
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Afiliação: |
EUGENIO FERREIRA COELHO, CNPMF; LAINA DE ANDRADE QUEIROZ, UFRB; LUANNA FERREIRA BRAS DOS SANTOS, UNESP; TULLIO RAPHAEL PEREIRA DE PADUA, CNPMF; VALÉRIA TEBINKA DOS SANTOS. |
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Título: |
Modelos paramétricos para estimativa da área foliar do abacaxizeiro. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE FRUTICULTURA, 24., 2016, São Luis. Fruticultura: fruteiras nativas e sustentabilidade. São Luis, MA: SBF, 2016 |
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Idioma: |
Português |
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Thesagro: |
Abacaxi. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/154531/1/trabalho-1484-1.pdf
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Marc: |
LEADER 00583nam a2200157 a 4500
001 2062475
005 2017-02-09
008 2016 bl uuuu u00u1 u #d
100 1 $aCOELHO, E. F.
245 $aModelos paramétricos para estimativa da área foliar do abacaxizeiro.$h[electronic resource]
260 $aIn: CONGRESSO BRASILEIRO DE FRUTICULTURA, 24., 2016, São Luis. Fruticultura: fruteiras nativas e sustentabilidade. São Luis, MA: SBF$c2016
650 $aAbacaxi
700 1 $aQUEIROZ, L. de A.
700 1 $aSANTOS, L. F. B. dos
700 1 $aPADUA, T. R. P. de
700 1 $aSANTOS, V. T. dos
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