Degradation of carbofuran and carbofuran-derivatives in presence of humic substances under basic conditions |
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Authors: | Morales Jorge Manso José A Cid Antonio Mejuto Juan C |
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Institution: | a Department of Physical Chemistry, Faculty of Sciences, University of Vigo, 32004 Ourense, Spain b CITI, Tecnopole, San Cibrao das Viñas, 32900 Ourense, Spain |
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Abstract: | The influence of humic aggregates in water solution upon the chemical stability of carbofuran (CF) and the carbofuran-derivatives, 3-hydroxy-carbofuran (HCF) and 3-keto-carbofuran (KCF), has been investigated in basic media. An inhibition upon the basic hydrolysis of 3-hydroxy-carbofuran and 3-keto-carbofuran (∼1.7 and ∼1.5-fold, respectively) was observed and it was rationalized in terms of the micellar pseudophase model. Nevertheless, non-significant effect upon the carbofuran stability was found in the presence of humic substances. These behaviors have been compared with the corresponding ones in other synthetic colloidal aggregates. |
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Keywords: | Humic substances Carbofuran 3-Hydroxy-carbofuran 3-Keto-carbofuran Pesticides Hydrolysis |
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