Título:	Organic compounds in the environment: soil sorption of acidic pesticides: modeling pH effects.
Autoria:	SPADOTTO, C. A. HORNSBY, A. G.
Afiliação:	CLAUDIO APARECIDO SPADOTTO, SGTE A. G. HORNSBY, Soil and Water Science Dep., Univ. of Florida.
Ano de publicação:	2003
Referência:	Journal of Environmental Quality, Madison, v. 32, p. 949-956, 2003.
Conteúdo:	A model of acidic pesticide sorption in soils was developed from theoretical modeling and experimental data, which initially considered a combination of a strongly acidic pesticide and a variable-charge soil with high clay content. Contribution of 2,4-D [(2,4-dichlorophenoxy) acetic acid] anionic-form sorption was small when compared with molecular sorption. Dissociation of 2,4-D was not sufficient to explain the variation in Kd as a function of pH. Accessibility of soil organic functional groups able to interact with the pesticide (conformational changes) as a function of organic matter dissociation was proposed to explain the observed differences in sorption. Experimental 2,4-D sorption data and Koc values from literature for flumetsulam [N-(2,6-difluorophenyl)-5-methyl [1,2,4] triazolo [1,5-a] pyrimidine-2-sulfonamide] and sulfentrazone
Thesagro:	Sorção Agrotóxico Modelo de simulação Ph
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPMA)