Data/hora: 24/09/2024 21:45:31

Biblioteca(s): 	Embrapa Meio Ambiente.	
Data corrente: 	19/12/2023	
Data da última atualização: 	19/12/2023	
Autoria: 	GUIDA, Y.; TORRES, F. B. M.; BARIZON, R. R. M.; ASSALIN, M. R.; ROSA, M. A.	
Afiliação: 	YAGO GUIDA, UNIVERSIDADE FEDERAL DO RIO DE JANEIRO; FÁBIO BARBOSA MACHADO TORRES, UNIVERSIDADE FEDERAL DO RIO DE JANEIRO; ROBSON ROLLAND MONTICELLI BARIZON, CNPMA; MARCIA REGINA ASSALIN, CNPMA; MARIA APARECIDA ROSA, CNPMA.	
Título: 	Confirming sulfluramid (EtFOSA) application as a precursor of perfluorooctanesulfonic acid (PFOS) in Brazilian agricultural soils.	
Ano de publicação: 	2023	
Fonte/Imprenta: 	Chemosphere, v. 325, article138370, 2023.	
ISSN: 	0045-6535	
DOI: 	https://dx.doi.org/10.1016/j.chemosphere.2023.138370	
Idioma: 	Inglês	
Conteúdo: 	Abstract: Perfluorooctanesulfonic acid (PFOS) is a manmade chemical with several industrial applications and also a potential byproduct of many other per- and polyfluorinated substances (PFAS) in the environment. Due to the gathered evidence on its environmental persistence, long-range transport, toxicity, and bioaccumulative and biomagnifying properties, PFOS, its salts and perfluorooctane sulfonyl fluoride (PFOSF), were listed for global restriction under the Stockholm Convention on Persistent Organic Pollutants in 2009. Nevertheless, Brazil has granted an acceptable purpose exemption for using PFOSF to produce sulfluramid (EtFOSA) and to apply it as insecticide to control leaf-cutting ants of the genus Atta and Acromyrmex. Previous studies have pointed out EtFOSA as a precursor of PFOS in the environment, including in soils. Therefore, we aimed to confirm the role of EtFOSA in PFOS formation in soils representing areas where sulfluramid-based ant baits are used. A biodegradation assay was carried out by applying technical EtFOSA in triplicate samples of ultisol (PV) and oxisol (LVd) and measuring the contents of EtFOSA, perfluorooctane sulfonamide acetic acid (FOSAA), perfluorooctane sulfonamide (FOSA), and PFOS at seven moments (0, 3, 7, 15, 30, 60, and 120 days). The monitored byproducts started being noticed on the 15th day. After 120 days, PFOS yields were 30% for both soils, whereas FOSA yields were 46% (PV soil) and 42% (LVd soil) and FOSAA yields were 6% (PV soil) and 3% (LVd soil). It can be expected that FOSAA and FOSA contents will eventually be converted into PFOS in the environment and that the presence of plants could boost PFOS formation. Therefore, the ongoing extensive and intensive use of sulfluramid-based ant baits pose a considerable source of PFOS to the environment.	
Palavras-Chave: 	Environmental transformation; Forever chemicals; Perfluoroalkyl acids; PFAAs.	
Thesagro: 	Agrotóxico; Composto Orgânico; Poluição do Solo.	
Thesaurus Nal: 	Ant control; Perfluorocarbons; pesticides; Soil pollution.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
Registro original: 	Embrapa Meio Ambiente (CNPMA)	
Exemplares: 	CNPMA - (17516-1) - UPC - AP - DD -  -  -  - DIS