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Registros recuperados : 318 | |
Registros recuperados : 318 | |
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Registro Completo
Biblioteca(s): |
Embrapa Meio Ambiente. |
Data corrente: |
22/05/2007 |
Data da última atualização: |
08/06/2015 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
Internacional - A |
Autoria: |
SPADOTTO, C. A.; HORNSBY, A. G.; GOMES, M. A. F. |
Afiliação: |
CLAUDIO APARECIDO SPADOTTO, SGTE; Arthur G. Hornsby, University ofFlorida, Gainesville, Florida, USA; MARCO ANTONIO FERREIRA GOMES, CNPMA. |
Título: |
Sorption and leaching potential of acidic herbicides in Brazilian soils. |
Ano de publicação: |
2005 |
Fonte/Imprenta: |
Journal of Environmental Science and Health. Part B, Pesticides, Food Contaminants, and Agricultural Wastes, New York, v. B40, n. 1, p. 29-37, 2005. |
Idioma: |
Inglês |
Conteúdo: |
Leaching of acidic herbicides (2, 4-D, flumetsulam, and sulfentrazone) in soils was estimated by comparing the original and modified AF (Attenuation Factor) models for multi-layered soils (AFi). The original AFi model was modified to include the concept of pH-dependence for Kd (sorption coefficient) based on pesticide dissociation and changes in the accessibility of soil organic functional groups able to interact with the pesticide. The original and modified models, considering soil and herbicide properties, were applied to assess the leaching potential of selected herbicides in three Brazilian soils. The pH-dependent Kd values estimated for all three herbicides were observed to be always higher than pH-independent Kd values calculated using average Koc data, and therefore the original AFi model overestimated the overall leaching potential for the soils studied. |
Thesagro: |
Herbicida; Lixiviação; Modelo de simulação; Solo; Sorção. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
Marc: |
LEADER 01545naa a2200205 a 4500 001 1015448 005 2015-06-08 008 2005 bl uuuu u00u1 u #d 100 1 $aSPADOTTO, C. A. 245 $aSorption and leaching potential of acidic herbicides in Brazilian soils.$h[electronic resource] 260 $c2005 520 $aLeaching of acidic herbicides (2, 4-D, flumetsulam, and sulfentrazone) in soils was estimated by comparing the original and modified AF (Attenuation Factor) models for multi-layered soils (AFi). The original AFi model was modified to include the concept of pH-dependence for Kd (sorption coefficient) based on pesticide dissociation and changes in the accessibility of soil organic functional groups able to interact with the pesticide. The original and modified models, considering soil and herbicide properties, were applied to assess the leaching potential of selected herbicides in three Brazilian soils. The pH-dependent Kd values estimated for all three herbicides were observed to be always higher than pH-independent Kd values calculated using average Koc data, and therefore the original AFi model overestimated the overall leaching potential for the soils studied. 650 $aHerbicida 650 $aLixiviação 650 $aModelo de simulação 650 $aSolo 650 $aSorção 700 1 $aHORNSBY, A. G. 700 1 $aGOMES, M. A. F. 773 $tJournal of Environmental Science and Health. Part B, Pesticides, Food Contaminants, and Agricultural Wastes, New York$gv. B40, n. 1, p. 29-37, 2005.
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