Transformation and sorption of fipronil in urban stream sediments

Journal of Agricultural and Food Chemistry
Kunde LinJay Gan

Abstract

Fipronil is an urban-use insecticide, and the increased use has led to its frequent detections in urban streams. Most studies on the environmental fate of fipronil so far have focused on soils, and little is known about its behavior in sediment-water systems. In this study, we investigated the transformation and sorption of fipronil in urban stream sediments from California, incubated under facultative and anaerobic conditions. Degradation of fipronil in sediments generally followed exponential decay kinetics, and the first-order half-lives of fipronil were only 4.6-18.5 days in anaerobic sediments. The persistence of fipronil under facultative conditions was considerably longer, with half-lives from 25 to 91 days. Sterilization generally decreased the dissipation of fipronil, indicating that microbial activity was an important factor in fipronil transformations in sediments. Under facultative conditions, fipronil sulfide and sulfone were observed, while only fipronil sulfide was detected in anaerobic samples. The sorption coefficient K d consistently increased with organic carbon contents of sediments. In the same sediment, K d usually also increased with contact time, suggesting decreased availability for aged residues. Resul...Continue Reading

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Citations

Jan 8, 2013·Environmental Science and Pollution Research International·Yong YuLaosheng Wu
Jan 17, 2012·Environmental Science & Technology·J GanJ X Li
Dec 26, 2013·Environmental Science & Technology·Donald P Weston, Michael J Lydy
Aug 9, 2011·Journal of Agricultural and Food Chemistry·Laura Delgado-MorenoJay Gan
Dec 18, 2013·Chemosphere·Kousik MandalV K Gupta
Jul 24, 2010·Bulletin of Environmental Contamination and Toxicology·Niladri Sekhar Chatterjee, Suman Gupta
Aug 16, 2012·Bulletin of Environmental Contamination and Toxicology·R Flores-RamírezM D Ortiz-Pérez
Feb 3, 2016·Archives of Environmental Contamination and Toxicology·Viet D DangNancy D Denslow
Apr 27, 2013·Ecotoxicology and Environmental Safety·Kousik MandalV K Gupta
Apr 17, 2012·Journal of Hazardous Materials·Tiantian LiuZhiqiang Zhou
Aug 24, 2010·Pest Management Science·Les GreenbergJay Gan
Nov 3, 2011·Pest Management Science·Xiufu ShuaiChittaranjan Ray
Sep 8, 2010·Environmental Toxicology and Chemistry·Wenjian LaoKeith A Maruya
Oct 2, 2014·Bulletin of Environmental Contamination and Toxicology·Anand SinghP C Srivastava
Nov 29, 2011·The Science of the Total Environment·Dang Quoc ThuyetThomas M Young
Jun 4, 2017·Environmental Toxicology and Chemistry·Félix Augusto Hernández-GuzmánAna Paula Fonseca
Apr 4, 2019·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Xiongfeng HuMingsheng Jiang
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Oct 11, 2020·Environmental Pollution·Zachary CryderJay Gan
Dec 19, 2020·Ecotoxicology and Environmental Safety·Thandy Junio da Silva PintoEvaldo Luiz Gaeta Espindola
Aug 2, 2019·Environmental Science & Technology·Allison R TaylorJay Gan

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