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| Registros recuperados : 6 | |
| 4. |  | COSTA, C. F. G.; FIGUEIREDO, R. de O.; SANTOS, I. P. de O.; GERHARD, P.; PIRES, C. S.; BARROSO, D. F. R.; COSTA, F. F.; BREJÃO, G. L. Seleção de pontos de amostragem para monitoramento de qualidade de água em escala de microbacia na Amazônia. In: VASCONCELOS, S. S.; RUIVO, M. de L. P.; LIMA, A. M. .M de. (Org.). Amazônia em tempo: impactos do uso da terra em diferentes escalas. Belém: Embrapa Amazônia Oriental, 2017. p. 467-490.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 5. | | COSTA, C. F. G. da; FIGUEIREDO, R. de O.; SANTOS, I. P. de O.; GERHARD, P.; PIRES, C. S.; BARROSO, D. F. R.; COSTA, F. F.; BREJÃO, G. L. Análise do uso da terra integrado com parâmetros de qualidade de água em microbacias do Nordeste Paraense. In: SIMPÓSIO BRASILEIRO DE RECURSOS HÍDRICOS, 19., 2011, Maceió Anais... Maceió: Associação Brasileira de Recursos Hidricos, 2011. 14 p.| Biblioteca(s): Embrapa Amazônia Oriental; Embrapa Meio Ambiente. |
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| 6. | | COSTA, C. F. G. da; FIGUEIREDO, R. de O.; SANTOS, I. P. de O.; GERHARD, P.; PIRES, C. da S.; BARROSO, D. F. R.; COSTA, F. F.; BREJÃO, G. L. Análise preliminar de parâmetros físico-químicos em águas fluviais em duas mesobacias hidrográficas no Nordeste paraense. In: CONGRESSO NACIONAL DE MEIO AMBIENTE DE POÇOS DE CALDAS, 7.; ENCONTRO DE APICULTORES DO SUL DE MINAS, 1., 2010, Poços de Caldas. Anais... Poços de Caldas: GSC, 2010.| Biblioteca(s): Embrapa Amazônia Oriental. |
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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. |
Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
12/08/2014 |
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Data da última atualização: |
08/11/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
ARAÚJO, J. R.; ARCHANJO, B. S.; SOUZA, K. R. de; kwapinski, w.; FALCÃO, N. P. S.; NOVOTNY, E. H.; ACHETE, C. A. |
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Afiliação: |
Joyce R. Araujo, Instituto Nacional de Metrologia, Qualidade e Tecnologia; Braulio S. Archanjo, Instituto Nacional de Metrologia, Qualidade e Tecnologia; Katia R. de Souza, Instituto Nacional de Metrologia, Qualidade e Tecnologia; Witold Kwapinski, Department of Chemical and Environmental Science, University of Limerick; Newton P. S. Falcão, Departamento de Ciências Agronômicas, Instituto Nacional de Pesquisas da Amazônia, Manaus.; ETELVINO HENRIQUE NOVOTNY, CNPS; Carlos A. Achete, Universidade Federal do Rio de Janeiro. |
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Título: |
Selective extraction of humic acids from an anthropogenic Amazonian dark earth and from a chemically oxidized charcoal. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Biology and Fertility of Soils, v. 50, n. 8, p. 1223-1232, 2014. |
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DOI: |
https://doi.org/10.1007/s00374-014-0940-9 |
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Idioma: |
Inglês |
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Conteúdo: |
Spectroscopic techniques including X-ray photoelectron spectroscopy (XPS) can identify particular chemical groups of humic acids (HA) from "Terra Preta de Índios" (TPI) or Amazonian dark earth, the highly fertile anthropogenic soil found in the Amazonian region. The high fertility and resilience of these soils cannot be explained by their chemically inert pyrogenic C content alone, but the natural aging of this C generates reactive carboxyl functional groups attached directly to the recalcitrant polycondensed aromatic backbone. Through spectroscopic techniques used in this work, the HA fraction (the alkaline-soluble organic matter that precipitates at low pH) of the TPI soil was compared with humic and fulvic acids, obtained by oxidizing activated charcoal with sodium hypochlorite. The yields recovery of HAlike substances was 12 and 28 wt% by using 10 and 20 cmol L-1 of oxidizing agent, respectively. X-ray photoelectron spectroscopy, energy dispersive X-ray, and solid-state 13C nuclear magnetic resonance (13C NMR) spectroscop Spectroscopic techniques including X-ray photoelectron spectroscopy (XPS) can identify particular chemical groups of humic acids (HA) from "Terra Preta de Índios" (TPI) or Amazonian dark earth, the highly fertile anthropogenic soil found in the Amazonian region. The high fertility and resilience of these soils cannot be explained by their chemically inert pyrogenic C content alone, but the natural aging of this C generates reactive carboxyl functional groupsattached directly to the recalcitrant polycondensed aromatic backbone. Through spectroscopic techniques used in this work, the HA fraction (the alkaline-soluble organic matter that precipitates at low pH) of the TPI soil was compared with humic and fulvic acids, obtained by oxidizing activated charcoal with sodium hypochlorite. The yields recovery of HAlike substances was 12 and 28 wt% by using 10 and 20 cmol L-1 of oxidizing agent, respectively. X-ray photoelectron spectroscopy, energy dispersive X-ray, and solid-state 13C nuclear magnetic resonance (13C NMR) spectroscopies were used to evaluate the elements and structures present in all samples. XPS C 1 s spectra of HA extracted from TPI soil and from prepared HA showed aromatic structures (C=C and * shake-up satellite peak) bounded to carboxyl groups (COOH). The morphology and polycondensation level of aromatic C were evaluated by scanning electron microscopy (SEM). The similarities of the spectra indicated that the used method was efficient to obtain an organic amendment similar to TPI soil organic matter. MenosSpectroscopic techniques including X-ray photoelectron spectroscopy (XPS) can identify particular chemical groups of humic acids (HA) from "Terra Preta de Índios" (TPI) or Amazonian dark earth, the highly fertile anthropogenic soil found in the Amazonian region. The high fertility and resilience of these soils cannot be explained by their chemically inert pyrogenic C content alone, but the natural aging of this C generates reactive carboxyl functional groups attached directly to the recalcitrant polycondensed aromatic backbone. Through spectroscopic techniques used in this work, the HA fraction (the alkaline-soluble organic matter that precipitates at low pH) of the TPI soil was compared with humic and fulvic acids, obtained by oxidizing activated charcoal with sodium hypochlorite. The yields recovery of HAlike substances was 12 and 28 wt% by using 10 and 20 cmol L-1 of oxidizing agent, respectively. X-ray photoelectron spectroscopy, energy dispersive X-ray, and solid-state 13C nuclear magnetic resonance (13C NMR) spectroscop Spectroscopic techniques including X-ray photoelectron spectroscopy (XPS) can identify particular chemical groups of humic acids (HA) from "Terra Preta de Índios" (TPI) or Amazonian dark earth, the highly fertile anthropogenic soil found in the Amazonian region. The high fertility and resilience of these soils cannot be explained by their chemically inert pyrogenic C content alone, but the natural aging of this C generates reactive carboxyl functional g... Mostrar Tudo |
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Palavras-Chave: |
Ácido húmico; Amazon dark earth; Humic acid. |
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Thesaurus NAL: |
terra preta. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
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024 7 $ahttps://doi.org/10.1007/s00374-014-0940-9$2DOI
100 1 $aARAÚJO, J. R.
245 $aSelective extraction of humic acids from an anthropogenic Amazonian dark earth and from a chemically oxidized charcoal.$h[electronic resource]
260 $c2014
520 $aSpectroscopic techniques including X-ray photoelectron spectroscopy (XPS) can identify particular chemical groups of humic acids (HA) from "Terra Preta de Índios" (TPI) or Amazonian dark earth, the highly fertile anthropogenic soil found in the Amazonian region. The high fertility and resilience of these soils cannot be explained by their chemically inert pyrogenic C content alone, but the natural aging of this C generates reactive carboxyl functional groups attached directly to the recalcitrant polycondensed aromatic backbone. Through spectroscopic techniques used in this work, the HA fraction (the alkaline-soluble organic matter that precipitates at low pH) of the TPI soil was compared with humic and fulvic acids, obtained by oxidizing activated charcoal with sodium hypochlorite. The yields recovery of HAlike substances was 12 and 28 wt% by using 10 and 20 cmol L-1 of oxidizing agent, respectively. X-ray photoelectron spectroscopy, energy dispersive X-ray, and solid-state 13C nuclear magnetic resonance (13C NMR) spectroscop Spectroscopic techniques including X-ray photoelectron spectroscopy (XPS) can identify particular chemical groups of humic acids (HA) from "Terra Preta de Índios" (TPI) or Amazonian dark earth, the highly fertile anthropogenic soil found in the Amazonian region. The high fertility and resilience of these soils cannot be explained by their chemically inert pyrogenic C content alone, but the natural aging of this C generates reactive carboxyl functional groupsattached directly to the recalcitrant polycondensed aromatic backbone. Through spectroscopic techniques used in this work, the HA fraction (the alkaline-soluble organic matter that precipitates at low pH) of the TPI soil was compared with humic and fulvic acids, obtained by oxidizing activated charcoal with sodium hypochlorite. The yields recovery of HAlike substances was 12 and 28 wt% by using 10 and 20 cmol L-1 of oxidizing agent, respectively. X-ray photoelectron spectroscopy, energy dispersive X-ray, and solid-state 13C nuclear magnetic resonance (13C NMR) spectroscopies were used to evaluate the elements and structures present in all samples. XPS C 1 s spectra of HA extracted from TPI soil and from prepared HA showed aromatic structures (C=C and * shake-up satellite peak) bounded to carboxyl groups (COOH). The morphology and polycondensation level of aromatic C were evaluated by scanning electron microscopy (SEM). The similarities of the spectra indicated that the used method was efficient to obtain an organic amendment similar to TPI soil organic matter.
650 $aterra preta
653 $aÁcido húmico
653 $aAmazon dark earth
653 $aHumic acid
700 1 $aARCHANJO, B. S.
700 1 $aSOUZA, K. R. de
700 1 $akwapinski, w.
700 1 $aFALCÃO, N. P. S.
700 1 $aNOVOTNY, E. H.
700 1 $aACHETE, C. A.
773 $tBiology and Fertility of Soils$gv. 50, n. 8, p. 1223-1232, 2014.
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