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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Biodegradation of Fipronil: Transformation Products, Microbial Characterisation and Toxicity Assessment

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Author(s):
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Tomazini, Rafaela [1] ; Saia, Flavia T. [2] ; van der Zaan, Bas [3] ; Grosseli, Guilherme M. [1] ; Fadini, Pedro S. [1] ; de Oliveira, Raiane G. M. [2] ; Gregoracci, Gustavo B. [2] ; Mozetto, Antonio [1] ; van Vugt-Lussenburg, Barbara M. A. [4] ; Brouwer, Abraham [4, 5] ; Langenhoff, Alette A. M. [6]
Total Authors: 11
Affiliation:
[1] Fed Univ Sao Carlos UFSCar, Dept Chem, Lab Environm Biogeochem, Nucleus Diagnoses & Environm Intervent, Via Washington Luis Km 235, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Fed Sao Paulo, Inst Marine Sci, Av Dr Carvalho de Mendonca 144, BR-11070102 Santos, SP - Brazil
[3] Deltares, Dept Subsurface & Groundwater Syst, POB 85467, NL-3508 AL Utrecht - Netherlands
[4] BioDetect Syst Bv, Sci Pk 406, NL-1098 XH Amsterdam - Netherlands
[5] Vrije Univ Amsterdam, Dept Anim Ecol, Boelelaan 1085, NL-1081 HV Amsterdam - Netherlands
[6] Wageningen Univ & Res, Dept Environm Technol, POB 17, NL-6700 EV Wageningen - Netherlands
Total Affiliations: 6
Document type: Journal article
Source: WATER AIR AND SOIL POLLUTION; v. 232, n. 3 MAR 2021.
Web of Science Citations: 0
Abstract

Fipronil is a highly active, broad spectrum insecticide with increasing and wide use. The degradation of fipronil was studied in Brazilian soil under oxic and anoxic conditions. Under oxic conditions, the half-life of fipronil was 16.9 days, with fipronil sulfone as the main metabolite, and no further degradation during 30 days of incubation. This degradation was accompanied by an increase of bacterial and archaeal ammonia oxidizers, as well as denitrifiers, and microorganisms related to Sphingomonas. Under anoxic conditions, a half-life of 15.7 days for fipronil was obtained, with fipronil sulphide as the primary metabolite, and fipronil sulfone at lower concentrations, with no further degradation of these metabolites during 90 days of incubation. In these conditions, complete degradation of fipronil was accompanied by an increase of denitrifiers, iron-reducers and ammonia oxidizers and selection of microorganisms that are related to uncultured Clostridiales (family VIII). Sulphate reducers and methanogens and most of the microbial community were not affected by fipronil and its metabolites. Toxicity evaluation, using in vitro effect-based CALUX assays confirmed that the metabolites have a similar toxic potency as compared to the parent compound fipronil. Therefore, the potential (eco)toxicity of fipronil does not seem to decrease upon microbial degradation. (AU)

FAPESP's process: 12/51496-3 - The environmental impact of biofuel production: functional bio-indicators for sustainable and optimal biofuel production
Grantee:Flávia Talarico Saia
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants