Data/hora: 29/05/2024 23:58:49

Biblioteca(s): 	Embrapa Meio Ambiente.	
Data corrente: 	28/11/2022	
Data da última atualização: 	28/11/2022	
Autoria: 	BARIZON, R. R. M.; KUMMROW, F.; ALBUQUERQUE, A. F.; ASSALIN, M. R.; ROSA, M. A.; SOUZA, D. R. C. de; PAZIANOTTO, R. A. A.	
Afiliação: 	ROBSON ROLLAND MONTICELLI BARIZON, CNPMA; FÁBIO KUMMROW, UNIVERSIDADE FEDERAL DE SÃO PAULO; ANJAINA FERNANDES DE ALBUQUERQUE, UNIVERSIDADE ESTADUAL DE CAMPINAS; MARCIA REGINA ASSALIN, CNPMA; MARIA APARECIDA ROSA, CNPMA; DEBORA RENATA CASSOLI DE S DUTRA, CNPMA; RICARDO ANTONIO ALMEIDA PAZIANOTTO, CNPMA.	
Título: 	Surface water contamination from pesticide mixtures and risks to aquatic life in a high-input agricultural region of Brazil.	
Ano de publicação: 	2022	
Fonte/Imprenta: 	Chemosphere, v. 308, pt. 3, article 136400, 2022.	
Páginas: 	p. 1-10.	
DOI: 	https://doi.org/10.1016/j.chemosphere.2022.136400	
Idioma: 	Inglês	
Conteúdo: 	Abstract: The environmental risks of pesticides found in surface waters of an important agricultural basin in Brazil were estimated by adopting two approaches: individual pesticides risk quotients (RQ) and concentration addition model for pesticide mixtures (RQs) contained in each water sample. Monitoring was carried out in the Mogi Guaçu River basin, Brazil, from October 2017 to May 2018. Four sampling points were selected in the Mogi Guaçu River and seven in its tributaries A multiresidue method with solid-phase extraction and subsequent analysis by UPLC-ESI-QqQ-MS/MS was developed to quantify 19 pesticides. Herbicides, except for simazine, presented the highest detection frequencies with values above 70%. Tebuthiuron was found in all 55 analyzed samples, presenting the highest concentration (6437 ng L-1) over the monitoring period. Fungicides and insecticides showed similar detection frequency (DF) values, ranging from 1.8% to 21.8%. Tebuconazole and carbofuran were the fungicides and insecticides most frequently detected, respectively. January 2018 sampling showed the highest total concentration of pesticides, differing from March 2018 and May 2018 (p < 0.05). The MG2 > TMG8 > MG1 > TMG6 sites showed the highest concentration total of pesticides while MG4 > TMG4 > TMG3 (p < 0.05) sites showed the lowest values: MG4 > TMG4 > TMG3 (p < 0.05). Most pesticide occurrences presented no risks to aquatic organisms. Only 19 out of the 175 pesticide occurrences > LOQ presented individual risks to aquatic biota. Contrary to the results obtained by the individual risk assessment, most pesticide mixtures presented risks to aquatic biota. In 36 out of the 55 samples analyzed during monitoring, pesticide mixtures presented risks to aquatic life.	
Palavras-Chave: 	Aquatic life; Multiple exposure.	
Thesagro: 	Agrotóxico; Águas Superficiais; Análise de Risco; Fungicida; Herbicida; Poluição da Água; Resíduo Quimico.	
Thesaurus Nal: 	Agrochemicals; Pesticide mixtures; Pesticide residues; Pesticides; Risk assessment; Water pollution.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
Registro original: 	Embrapa Meio Ambiente (CNPMA)	
Exemplares: 	CNPMA - (17258-1) - UPC - AP - DD -  -  -  - DIS