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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
04/03/2008 |
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Data da última atualização: |
05/03/2008 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MELO, E. E. C. de; NASCIMENTO, C. W. A. do; ACCIOLY, A. M. A.; SANTOS, A. C. Q. |
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Afiliação: |
Évio Eduardo Chaves de Melo, UFRPE; Clístenes Williams Araújo do Nascimento, UFRPE; Adriana Maria Aguiar Accioly, CNPMF; Ana Cristiane Queiroz SAntos, UFRPE. |
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Título: |
Phytoextraction and fractionation of heavy metals in soil after multiple applications of natural chelants. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Scientia Agricola, Piracicaba, v. 65, n. 1, p. 61-68, 2008. |
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ISSN: |
0103-9016 |
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Idioma: |
Inglês |
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Notas: |
doi: 10.1590/S0103-90162008000100009 |
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Conteúdo: |
Chelate-assisted phytoextraction of heavy metals is a promising approach to clean up polluted soils. However, the most successful chelants tested so far are synthetic agents that barely degrade in soil, increasing the metal leaching risks. Natural organic acids have been proposed to enhance phytoextraction due to their higher biodegradability, but they can also be a drawback for efficient phytoextraction. This work was carried out to compare the effectiveness of multiple applications of citric and gallic acids on the availability in soil and accumulation of Cd, Pb, Cu, and Zn by velvet bean (Stizolobium aterrimum) plants. The organic acids were added as follows: 5 mmol kg-1 in the 28th cultivation day; two doses of 5 mmol kg-1 at the 28th and 31st day; and three applications at the same rate at the 28th, 31st, and 34th day of velvet bean cultivation. Soil samples were sequentially extracted and soil solution metal concentrations assessed. Neither citric acid nor gallic acid was efficient for metals phytoextraction. In general, low molecular weight organic acids (LMWOA) application increased the metal concentrations in the water soluble and exchangeable fractions. Zinc and Cu were retained mostly in the organic matter fraction. Zn was remobilized from the organic matter fraction through LMWOA application into the water soluble and exchangeable fractions. LMWOA mobilized Pb and Cu from iron oxides, but such an increase in solubility was not high enough to affect phytoextraction. MenosChelate-assisted phytoextraction of heavy metals is a promising approach to clean up polluted soils. However, the most successful chelants tested so far are synthetic agents that barely degrade in soil, increasing the metal leaching risks. Natural organic acids have been proposed to enhance phytoextraction due to their higher biodegradability, but they can also be a drawback for efficient phytoextraction. This work was carried out to compare the effectiveness of multiple applications of citric and gallic acids on the availability in soil and accumulation of Cd, Pb, Cu, and Zn by velvet bean (Stizolobium aterrimum) plants. The organic acids were added as follows: 5 mmol kg-1 in the 28th cultivation day; two doses of 5 mmol kg-1 at the 28th and 31st day; and three applications at the same rate at the 28th, 31st, and 34th day of velvet bean cultivation. Soil samples were sequentially extracted and soil solution metal concentrations assessed. Neither citric acid nor gallic acid was efficient for metals phytoextraction. In general, low molecular weight organic acids (LMWOA) application increased the metal concentrations in the water soluble and exchangeable fractions. Zinc and Cu were retained mostly in the organic matter fraction. Zn was remobilized from the organic matter fraction through LMWOA application into the water soluble and exchangeable fractions. LMWOA mobilized Pb and Cu from iron oxides, but such an increase in solubility was not high enough to affect phytoextractio... Mostrar Tudo |
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Thesagro: |
Metal; Solo. |
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Thesaurus Nal: |
pollution. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02149naa a2200217 a 4500
001 1654832
005 2008-03-05
008 2008 bl --- 0-- u #d
022 $a0103-9016
100 1 $aMELO, E. E. C. de
245 $aPhytoextraction and fractionation of heavy metals in soil after multiple applications of natural chelants.
260 $c2008
500 $adoi: 10.1590/S0103-90162008000100009
520 $aChelate-assisted phytoextraction of heavy metals is a promising approach to clean up polluted soils. However, the most successful chelants tested so far are synthetic agents that barely degrade in soil, increasing the metal leaching risks. Natural organic acids have been proposed to enhance phytoextraction due to their higher biodegradability, but they can also be a drawback for efficient phytoextraction. This work was carried out to compare the effectiveness of multiple applications of citric and gallic acids on the availability in soil and accumulation of Cd, Pb, Cu, and Zn by velvet bean (Stizolobium aterrimum) plants. The organic acids were added as follows: 5 mmol kg-1 in the 28th cultivation day; two doses of 5 mmol kg-1 at the 28th and 31st day; and three applications at the same rate at the 28th, 31st, and 34th day of velvet bean cultivation. Soil samples were sequentially extracted and soil solution metal concentrations assessed. Neither citric acid nor gallic acid was efficient for metals phytoextraction. In general, low molecular weight organic acids (LMWOA) application increased the metal concentrations in the water soluble and exchangeable fractions. Zinc and Cu were retained mostly in the organic matter fraction. Zn was remobilized from the organic matter fraction through LMWOA application into the water soluble and exchangeable fractions. LMWOA mobilized Pb and Cu from iron oxides, but such an increase in solubility was not high enough to affect phytoextraction.
650 $apollution
650 $aMetal
650 $aSolo
700 1 $aNASCIMENTO, C. W. A. do
700 1 $aACCIOLY, A. M. A.
700 1 $aSANTOS, A. C. Q.
773 $tScientia Agricola, Piracicaba$gv. 65, n. 1, p. 61-68, 2008.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Clima Temperado. |
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Data corrente: |
03/10/2023 |
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Data da última atualização: |
03/10/2023 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
SIQUEIRA, O.; HIRANO, E.; BERTONCINI, O. |
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Afiliação: |
OSWALDO SIQUEIRA, CPACT; ELCIO HIRANO, CPACT; ODONE BERTONCINI, SPM - E. Canoinhas. |
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Título: |
Levantamento de espécies nativas de batata Solanum spp no sul do Brasil. |
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Ano de publicação: |
1979 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE OLERICULTURA, 19., 1979, Florianópolis. Resumos... Florianópolis: EMPASC: SOB, 1979. v. 2, p. 224-225. |
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Idioma: |
Português |
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Conteúdo: |
Com o objetivo de conhecer as espécies nativas de batata Solanum spp da Seção Tuberarium, Sub seção Hiperbasathrum Bitter, e várias Séries Rydberg, iniciou-se a coleta de material para posterior determinação taxonômica, através do Centro Internacional de la Papa, Lima, Peru. |
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Palavras-Chave: |
Bioma Pampa. |
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Thesagro: |
Batata. |
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Thesaurus NAL: |
Solanum. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1157027/1/Cpact-Siqueira-Hirano-Bertoncini.pdf
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Marc: |
LEADER 00855nam a2200169 a 4500
001 2157027
005 2023-10-03
008 1979 bl uuuu u00u1 u #d
100 1 $aSIQUEIRA, O.
245 $aLevantamento de espécies nativas de batata Solanum spp no sul do Brasil.$h[electronic resource]
260 $aIn: CONGRESSO BRASILEIRO DE OLERICULTURA, 19., 1979, Florianópolis. Resumos... Florianópolis: EMPASC: SOB, 1979. v. 2, p. 224-225.$c1979
520 $aCom o objetivo de conhecer as espécies nativas de batata Solanum spp da Seção Tuberarium, Sub seção Hiperbasathrum Bitter, e várias Séries Rydberg, iniciou-se a coleta de material para posterior determinação taxonômica, através do Centro Internacional de la Papa, Lima, Peru.
650 $aSolanum
650 $aBatata
653 $aBioma Pampa
700 1 $aHIRANO, E.
700 1 $aBERTONCINI, O.
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Embrapa Clima Temperado (CPACT) |
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