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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. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
28/03/2005 |
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Data da última atualização: |
28/03/2005 |
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Autoria: |
CRESPILHO, F. N.; SILVA, W. T. L.; REZENDE, M. O. O. |
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Título: |
Estudo, por via eletroquímica, da interação entre o herbicida Metribuzin e ácidos húmicos de vermicomposto. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Anais da Associação Brasileira de Química, v. 52, n. 2, p. 58-61, 2003. |
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Idioma: |
Português |
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Conteúdo: |
Humic acid (HA). natural recalcitrant organic matter. due their structure composed by hydrophonic and hydrophobic sites, have large ability to interact with herbicides, by several chemical and physical mechanisms. In present work, the influence of humic acid from vermicompost (VHA) on the chemical behavior of Metribuzin (MTZ), was observed applying carbon paste electrodes modified with VHA (VHA -CPE) in cyclic voltammetry. Results showed that the VHA-CPE presented a slightly different behavior when compared with the non-modified electrode. It was verified that the cathodic peak current increased considerably when the electrode was modified however, the reduction potentials do not change, indicating weak interaction between MTZ and VHA. The results showed the potentialities to apply this electrodes to better understand interactions between natural organic substances and pollutant. |
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Palavras-Chave: |
Ácido húmico; Herbicidas. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01429naa a2200169 a 4500
001 1028565
005 2005-03-28
008 2003 bl --- 0-- u #d
100 1 $aCRESPILHO, F. N.
245 $aEstudo, por via eletroquímica, da interação entre o herbicida Metribuzin e ácidos húmicos de vermicomposto.
260 $c2003
520 $aHumic acid (HA). natural recalcitrant organic matter. due their structure composed by hydrophonic and hydrophobic sites, have large ability to interact with herbicides, by several chemical and physical mechanisms. In present work, the influence of humic acid from vermicompost (VHA) on the chemical behavior of Metribuzin (MTZ), was observed applying carbon paste electrodes modified with VHA (VHA -CPE) in cyclic voltammetry. Results showed that the VHA-CPE presented a slightly different behavior when compared with the non-modified electrode. It was verified that the cathodic peak current increased considerably when the electrode was modified however, the reduction potentials do not change, indicating weak interaction between MTZ and VHA. The results showed the potentialities to apply this electrodes to better understand interactions between natural organic substances and pollutant.
653 $aÁcido húmico
653 $aHerbicidas
700 1 $aSILVA, W. T. L.
700 1 $aREZENDE, M. O. O.
773 $tAnais da Associação Brasileira de Química$gv. 52, n. 2, p. 58-61, 2003.
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