Dynamics of fipronil in Oleo Lagoon in Jatai Ecological Station, Sao Paulo-Brazil

Autor(es)

Peret, Andre Moldenhauer ^[1] ; Oliveira, Luciana Fontes ^[1] ; Bianchini, Jr., Irineu ^[2] ; Regali Seleghim, Mirna Helena ^[3] ; Peret, Alberto Carvalho ^[2] ; Mozeto, Antonio Aparecido ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Paulo, Dept Quim, Sao Paulo - Brazil

^[2] Univ Fed Sao Paulo, Dept Hidrobiol, Sao Carlos, SP - Brazil

^[3] Univ Fed Sao Paulo, Dept Ecol & Biol Evolut, Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Chemosphere; v. 78, n. 10, p. 1225-1229, MAR 2010.
• Citações Web of Science: 7

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 Ltd. All rights reserved. (AU)

• Processo FAPESP: 06/56723-7 - Avaliação da contaminação por fipronil de uma lagoa marginal do rio Mogi-Guaçu (E. E. de Jataí, Luiz Antônio-SP) e estudo da cinética de degradação deste contaminante por microrganismos aquáticos
• Beneficiário: Antonio Aparecido Mozeto
• Modalidade de apoio: Auxílio à Pesquisa - Regular