Dynamics of fipronil in Oleo Lagoon in Jatai Ecological Station, São Paulo-Brazil
Data
2010-03-01
Autores
Peret, Andre Moldenhauer 
Oliveira, Luciana Fontes
Bianchini, Irineu
Regali Seleghim, Mirna Helena
Peret, Alberto Carvalho
Mostrar mais
Tipo
Artigo
Título da Revista
ISSN da Revista
Título de Volume
Resumo
Fipronil is a phenylpyrazole pesticide widely used to protect sugar-cane crops from insect pests. After reaching the environment, this insecticide may have several fates. This research aimed to propose a kinetic model to describe the fate of commercial fipronil Regent 800WG (R) in the sediment-water interface of the Oleo Lagoon in the Mogi-Guacu river floodplain, situated within the Jatai Ecological Station, by means of a microcosm scale experiment. Results showed that a small fraction of the pesticide is quickly dragged to the sediment while most of it remains in the water column. Biodegradation proves to be an important fipronil degradation route, especially when microorganisms capable of using fipronil as sole carbon source increase their population, as a function of exposure time. Biodegradation rates were higher in the sediment than in the water column. (C) 2009 Elsevier B.V. All rights reserved.
Descrição
Citação
Chemosphere. Oxford: Pergamon-Elsevier B.V., v. 78, n. 10, p. 1225-1229, 2010.