title: Influence of micelles on the basic degradation of carbofuran.
abstract: The effect of micellar aggregates upon the stability of carbofuran in basic media has been studied. The effect of the presence of micelles upon the basic hydrolysis of carbofuran is a function of the nature of the surfactant monomer. Important catalysis of basic hydrolysis of carbofuran in the presence of colloid aggregates with positive surface charge has been reported. On the other hand, the presence of anionic and nonionic surfactants implies a large inhibition of the basic hydrolysis of carbofuran. Both catalysis and inhibition are due to the association of carbofuran with the micellar core. The kinetic constants for the basic hydrolysis of carbofuran in these microheterogeneous media have been obtained on the basis of a micellar pseudophase model. No significant changes in the intrinsic reactivity of HO- against carbofuran have been observed.
authors.affiliation: Area de Edafología y Química Agrícola, Facultad de Ciencias de Ourense, Universidad de Vigo, Ourense, Spain.
authors.forename: Manuel
authors.initials: M
authors.lastname: Arias
authors.forename: Luís
authors.initials: L
authors.lastname: García-Río
authors.forename: Juan C
authors.initials: JC
authors.lastname: Mejuto
authors.forename: Pedro
authors.initials: P
authors.lastname: Rodríguez-Dafonte
authors.forename: Jesus
authors.initials: J
authors.lastname: Simal-Gándara
mesh_terms: D000838:Anions; D002235:Carbofuran / Q000737:chemistry*; D002412:Cations; D004355:Drug Stability; D006868:Hydrolysis; D007306:Insecticides / Q000737:chemistry*; D007700:Kinetics; D008823:Micelles; D012972:Sodium Hydroxide / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D000838:Anions; D002412:Cations; D007306:Insecticides; D008823:Micelles; D014867:Water; D012972:Sodium Hydroxide; D002235:Carbofuran