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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas; Embrapa Solos. |
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Data corrente: |
27/02/2013 |
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Data da última atualização: |
26/09/2023 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
ALHO, C. F. B. V.; AUCCAISE, R.; MAIA, C. M. B. de F.; NOVOTNY, E. H.; LELIS, R. C. C. |
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Afiliação: |
CARLOS FRANCISCO BRAZÃO VIEIRA ALHO, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; RUBEN AUCCAISE, BOLSISTA CNPS; CLAUDIA MARIA BRANCO DE F MAIA, CNPF; ETELVINO HENRIQUE NOVOTNY, CNPS; ROBERTO CARLOS COSTA LELIS, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO. |
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Título: |
Using solid state 13C NMR to study pyrolysis final temperature effects on biochar stability. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
In: XU, J.; WU, J.; HE, Y. (ed.). Functions of natural organic matter in changing environment. Dordrecht: Springer, 2013. p. 1007-1011. |
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DOI: |
https://doi.org/10.1007/978-94-007-5634-2_186 |
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Idioma: |
Inglês |
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Conteúdo: |
Recent results in biochar research show that it is not only composed of stable carbon, since a portion of these materials is degraded relatively easily once applied to soil, and this condition is most dependent on pyrolysis conditions, especially the final temperature. Thus, the aim of this study was to evaluate pyrolysis final temperature effects on the stability of biochar produced from forest residues using solid-state 13C NMR. Pyrolysis was performed at a heating rate of 10°C·min-1 up to the final temperature of interest (350, 450 and 550°C), maintaining this temperature for 60 min. Solid-state 13C NMR spectra were obtained on a Varian 500-MHz spectrometer for fresh wood and biochars produced at 350, 450 and 550°C for Eucalyptus dunnii (DUN) and Pinus caribaea (CAR). Comparing fresh samples with their respective biochars, regardless of the botanical group, after pyrolysis, carbohydrates are degraded, and there is a change in the structure of the materials, with a predominance of aromatic structures, which are more resistant to degradation, therefore reflecting in the increased stability of these materials. For 350°C, it is still possible to observe signals related to lignin indicating that up to this temperature it has not been completely degraded. The spectra of biochars produced at 450 and 550°C are very similar, indicating that there is no need to produce biochars at very high final temperatures, since the structure of these materials obtained at 550°C slightly altered as of 450°C, keeping the predominance of aromatic structures. MenosRecent results in biochar research show that it is not only composed of stable carbon, since a portion of these materials is degraded relatively easily once applied to soil, and this condition is most dependent on pyrolysis conditions, especially the final temperature. Thus, the aim of this study was to evaluate pyrolysis final temperature effects on the stability of biochar produced from forest residues using solid-state 13C NMR. Pyrolysis was performed at a heating rate of 10°C·min-1 up to the final temperature of interest (350, 450 and 550°C), maintaining this temperature for 60 min. Solid-state 13C NMR spectra were obtained on a Varian 500-MHz spectrometer for fresh wood and biochars produced at 350, 450 and 550°C for Eucalyptus dunnii (DUN) and Pinus caribaea (CAR). Comparing fresh samples with their respective biochars, regardless of the botanical group, after pyrolysis, carbohydrates are degraded, and there is a change in the structure of the materials, with a predominance of aromatic structures, which are more resistant to degradation, therefore reflecting in the increased stability of these materials. For 350°C, it is still possible to observe signals related to lignin indicating that up to this temperature it has not been completely degraded. The spectra of biochars produced at 450 and 550°C are very similar, indicating that there is no need to produce biochars at very high final temperatures, since the structure of these materials obtained at 550°C slightly altere... Mostrar Tudo |
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Palavras-Chave: |
Forest residues; NMR; Organic matter stability; Pyrogenic carbon. |
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Thesaurus Nal: |
biochar. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
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Registro original: |
Embrapa Florestas (CNPF) |
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| 3. |  | CIPRIANO, T. de M.; CARVALHO, L. J. C. B.; CARNEIRO, N. P.; CARNEIRO, A. A.; ARAGÃO, F. J. L. Silenciamento mediado por RNA interferente do gene BE1 que codifica para a enzima de ramificação do amido I (SBE I) em milho (Zea mays L.). Revista Brasileira de Horticultura Ornamental, Campinas, v. 13, p. 329, 2007. Suplemento. Edição de Anais do 16º Congresso Brasileiro de Floricultura e Plantas Ornamentais; 3º Congresso Brasileiro de Cultura de Tecidos de Plantas; 1º Simpósio de Plantas Ornamentais Nativas, Goiânia, nov. 2007.| Tipo: Resumo em Anais de Congresso |
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| 7. | | CUNHA, N. B. da; JUNGMANN, L.; CIPRIANO, T. de M.; PÓVOA, A. M.; DE LUCCA, P. C.; LEITE, A.; VIANNA, G. R.; ARAGÃO, F. J. L.; RECH FILHO, E. L. Transformação genética de plantas de soja [Glycine max L.(MERRIL)] visando a produção do anticorpo scFvDIR83D4 anti-antígeno tumoral TN. In: CONGRESSO NACIONAL DE GENÉTICA, 49., 2003, Águas de Lindóia. A dupla hélice do DNA: anais. Águas de Lindóia: Sociedade Brasileira de Genética, 2003. P. 633| Biblioteca(s): Embrapa Gado de Corte. |
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| 8. | | SILVA, D. A. A. da; TOLEDO, J. L. de; PIERDONÁ, F. G.; ALVES, G. S. C.; ANDRÉ, M. de S. F.; PIRES, N. F.; CIPRIANO, T. de M.; TORRES, F. A. G.; SILVEIRA, C. E. dos S.; ARAGÃO, F. J. L.; PEREIRA, L. A. R. GGR (Geranylgeranyl Reductase) expression affects the allelopathic response to Arabidopsis Allelochemicals. Journal of Agricultural Science, v. 10, n. 7; p. 122-136, 2018.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
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