Persistence and sorption of fipronil degradates in urban stream sediments

  title={Persistence and sorption of fipronil degradates in urban stream sediments},
  author={Kunde Lin and Darren L. Haver and Lorence R. Oki and Jay Gan},
  journal={Environmental Toxicology and Chemistry},
  • Kunde Lin, D. Haver, J. Gan
  • Published 1 July 2009
  • Environmental Science
  • Environmental Toxicology and Chemistry
Fipronil, an increasingly popular insecticide used for urban pest control, is known to readily transform into several degradates that generally have similar or greater toxicity to aquatic organisms than the parent compound. However, knowledge on the fate of these degradates in the environment is obscure. In the present study, degradation kinetics and sorption of desthiofipronil, fipronil sulfide, and fipronil sulfone were investigated in urban stream sediments. All degradates showed enhanced… 
Toxicity of the insecticide fipronil and its degradates to benthic macroinvertebrates of urban streams.
It is demonstrated that fipronil and degradates are common in urban waterways at concentrations posing a risk to a wide variety of stream invertebrates, and fipronsil's toxicity to aquatic life has long been underestimated.
Fipronil Mobility and Transformation in Undisturbed Soil Columns
Results revealed that although majority of the fipronil remained in top 0–5 cm layer, substantial amount moved to 5–10 cm depth, indicating low mobility of these metabolites in comparison to fipronsil.
Monitoring Fipronil and Degradates in California Surface Waters, 2008-2013.
Estimates from a long-term monitoring site suggest that the annual fipronil loading is greater in the dry season than during storm events, which could have implications for future mitigation efforts because most runoff during this period was generated from irrigation and outdoor residential use.
Analysis, occurrence, and toxic potential of pyrethroids, and fipronil in sediments from an urban estuary
Toxic units estimated for these compounds revealed that bifenthrin and cypermethrin were likely contributors to the mortality observed in tests with the estuarine amphipod Eohaustorius estuarius, and the concentrations detected may be of concern for more sensitive crustacean species.
Dissipation kinetics of three toxic fipronil metabolites in water at different pH and GC-MS characterization of hydrolytic transformation products of fipronil sulfide and sulfone
In an effort to examine the persistence and degradation of three toxic fipronil metabolites including fipronil sulfide, fipronil sulfone and desulfinyl fipronil in water as a function of pH, a
Occurrence of fipronil and its biologically active derivatives in urban residential runoff.
Results of this study clearly established residential drainage as a direct source for pesticide contamination in urban waterways, and for the first time, identified fipronil as a new and widespread contaminant with potential ecotoxicological significance.
Fipronil and two of its transformation products in water and European eel from the river Elbe.
Mass Balance of Fipronil and Total Toxicity of Fipronil-Related Compounds in Process Streams during Conventional Wastewater and Wetland Treatment
Attenuation of the pesticide fipronil and its major degradates was determined during conventional wastewater treatment and wetland treatment, showing conventional treatment to be unfit for reducing overall toxicity.


Transformation and sorption of fipronil in urban stream sediments.
Results from this study showed that the stability of fipronil in sediments depends closely on the oxygen status and that due to the readily conversion of fIPronil to the sulfone and sulfide metabolites, the overall risk assessment of fipsonil in surface aquatic systems should take into consideration fipronsil as well as its metabolites.
Degradation and sorption of selected organophosphate and carbamate insecticides in urban stream sediments
The degradation and sorption of four common organophosphate and carbamate insecticides were studied in urban creek sediments from southern California, USA, and pesticides in sediment may vary greatly among compounds and with redox conditions.
The fate of fipronil in modular estuarine mesocosms.
Loss was apparently first-order in fipronil, although there appeared to be a change in the removal mechanism after 96 h that corresponded to a dramatic slowdown in its disappearance.
Laboratory and field studies on the degradation of fipronil in a soil
Degradation of a new insecticide/termiticide, fipronil, in a soil was studied in the laboratory and field. Three metabolites of fipronil (desulfinyl, sulfide, and sulfone derivatives) were identified
The sorption and degradation of the rice pesticides fipronil and thiobencarb on two Australian rice soils
The sorption and degradation of the rice pesticides fipronil and thiobencarb on 2 Australian rice-growing soils were investigated. Greater sorption of both pesticides occurred on the soil containing
Microbial Degradation of Fipronil in Clay Loam Soil
Fipronil, (±)-5-amino-1-(2,6-dichloro-∝,∝,∝-trifluoro-p-tolyl)-4-trifluoromethysulfinylpyrazole-3-carbonitrile, is used as an effective insecticide for the control of rice pests in China. Although
Kinetics and Mechanisms of Abiotic Degradation of Fipronil (Hydrolysis and Photolysis)
The abiotic degradation of fipronil (compound I), a phenylpyrazole insecticide, was studied in aqueous solution and on the surface of two soils from Niger (Saguia and Banizoumbou) and one
Sorption-desorption of "aged" sulfonylaminocarbonyltriazolinone herbicides in soil.
Data show the importance of characterization of sorption-desorption in aged herbicide residues in soil, particularly in the case of prediction of herbicide transport in soil where potential transport of sulfonylaminocarbonyltriazolinone herbicides would over-predicted if freshly treated soil K(d) values were used to predict transport.
Toxicity of Fipronil and Its Degradation Products to Procambarus sp.: Field and Laboratory Studies
Hazard quotient comparisons using measured water concentrations in the field and laboratory-based LC50s indicated that fipronil and its metabolites in water resulting from Icon-treated rice seed planting poses a significant risk to crayfish survival.