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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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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: |
LEADER 03385naa a2200253 a 4500
001 1992311
005 2021-11-08
008 2014 bl uuuu u00u1 u #d
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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Registro original: |
Embrapa Solos (CNPS) |
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Biblioteca(s): |
Embrapa Algodão. |
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Data corrente: |
20/07/2010 |
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Data da última atualização: |
20/07/2010 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
SAMPAIO, L. R.; MEDEIROS, E. P. de; CONRADO, L. de S. |
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Afiliação: |
Lígia Rodrigues Sampaio; EVERALDO PAULO DE MEDEIROS, CNPA; Líbia de Sousa Conrado. |
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Título: |
Produção de bioadsorventes obtidos da torta de mamona para remoção de íons cobre em soluções aquosas. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE MAMONA, 4.; SIMPÓSIO INTERNACIONAL DE OLEAGINOSAS ENERGÉTICAS, 1., 2010, João Pessoa. Inclusão social e energia: anais. Campina Grande: Embrapa Algodão, 2010. |
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ISSN: |
2177-6008 |
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Idioma: |
Português |
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Palavras-Chave: |
Adsorção de metais; Biomassa vegetal; Carvão ativado. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/18785/1/OLE-06.pdf
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Marc: |
LEADER 00682nam a2200169 a 4500
001 1858256
005 2010-07-20
008 2010 bl uuuu u00u1 u #d
022 $a2177-6008
100 1 $aSAMPAIO, L. R.
245 $aProdução de bioadsorventes obtidos da torta de mamona para remoção de íons cobre em soluções aquosas.
260 $aIn: CONGRESSO BRASILEIRO DE MAMONA, 4.; SIMPÓSIO INTERNACIONAL DE OLEAGINOSAS ENERGÉTICAS, 1., 2010, João Pessoa. Inclusão social e energia: anais. Campina Grande: Embrapa Algodão$c2010
653 $aAdsorção de metais
653 $aBiomassa vegetal
653 $aCarvão ativado
700 1 $aMEDEIROS, E. P. de
700 1 $aCONRADO, L. de S.
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