Data/hora: 21/06/2024 03:26:41

Biblioteca(s): | Embrapa Instrumentação.
Data corrente: | 28/03/2005
Data da última atualização: | 28/03/2005
Autoria: | CRESPILHO, F. N.; SILVA, W. T. L.; REZENDE, M. O. O.
Título: | Estudo, por via eletroquímica, da interação entre o herbicida Metribuzin e ácidos húmicos de vermicomposto.
Ano de publicação: | 2003
Fonte/Imprenta: | Anais da Associação Brasileira de Química, v. 52, n. 2, p. 58-61, 2003.
Idioma: | Português
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.
Palavras-Chave: | Ácido húmico; Herbicidas.
Categoria do assunto: | --
Registro original: | Embrapa Instrumentação (CNPDIA)
Exemplares: | CNPDIA - (8756-1) - UPC - SP - -- - PROCI-03.00101 -  - 2003.00101 - DIS