Abstract
Three sampling campaigns were performed in the Lis River (Leiria, Portugal) in February of 2018, November of 2018, and May of 2019. River water and wastewater (influent and effluent) samples of two wastewater treatment plants were target of the study. A total of 25 samples were collected and 50 pesticides were monitored, including organochlorines, triazines, pyrethroids, and organophosphorus, among others. Most of the detected pesticides were insecticides and mainly organochlorines. Concentrations between 1.29 and 2134 ng/L were found. Aldrin, γ-HCH, and cypermethrin were detected in some samples in μg/L, being γ-HCH the pesticide most frequently detected with concentration in μg/L level. The pesticides with the highest detection frequency were (i) cypermethrin, HCB, methoxychlor, and ζ-HCH in river waters; (ii) isoproturon, cypermethrin, methoxychlor, pyrimethanil, γ-HCH, dieldrin, diuron, α-HCH, and α-endosulfan in effluents; and (iii) diuron and isoproturon in influents. The detection of the organochlorides and their degradation products is a consequence of their persistence in the environment, as their usage has long been prohibited in the European Union. Pesticides were grouped by their types in herbicides, insecticides, or fungicides and the detection and concentration for each type were discussed with the climatic conditions. Pesticide toxicity index was determined in the samples collected in the river.
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Acknowledgements
The authors are grateful for the financial support from the Fundação para a Ciência e a Tecnologia (FCT) / Ministério da Ciência, Tecnologia e Ensino Superior (MCTES) through national funds (Portugal) (UIDB/50006/2020). The authors would like to thank the EU and FCT / UEFISCDI /FORMAS for funding in the frame of the collaborative international consortium REWATER financed under the ERA-NET Cofund WaterWorks2015 Call. This ERA-NET is an integral part of the 2016 Joint Activities developed by the Water Challenges for a Changing World Joint Programme Initiative (WaterJPI/0007/2016). The authors would like to also thank the financial support from the project PTDC/ASP-PES/29547/2017–CECs(Bio)Sensing-(Bio)sensors for assessment of contaminants of emerging concern in fishery commodities, by national funds by FCT / MCTES and co-supported by Fundo Europeu de Desenvolvimento Regional (FEDER) throughout POC - Programa Operacional Competitividade e Internacionalização. S. Sousa is grateful to FCT for the Ph.D grant (SFRH/BD/137516/2018) and Luciana Bitencourt is grateful for the financial support from the Instituto Federal de Educação, Ciências e Tecnologia de Sergipe.
Funding
This study received funding from Fundação para a Ciência e a Tecnologia (FCT) / Ministério da Ciência, Tecnologia e Ensino Superior (MCTES) through national funds (Portugal) (UIDB/50006/2020); EU and FCT / UEFISCDI /FORMAS for funding in the frame of the collaborative international consortium REWATER financed under the ERA-NET Cofund WaterWorks2015 Call (WaterJPI/0007/2016); FCT / MCTES and co-supported by Fundo Europeu de Desenvolvimento Regional (FEDER) throughout POC - Programa Operacional Competitividade e Internacionalização: PTDC/ASP-PES/29547/2017; Ph.D grant (SFRH/BD/137516/2018).
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Paula Paíga: Conceptualization; Methodology, Validation and Data Curation for the pesticides analysed by liquid chromatography; Investigation, Formal analysis; Writing - Original Draft.
Sara Sousa: Methodology, Validation and Data Curation for the pesticides analysed in gas chromatography, Investigation, Writing - Review & Editing.
José Vera: Methodology, Validation and Data Curation for the pesticides analysed in gas chromatography; Investigation.
Luciana Bitencourt: Methodology, Validation, and Data Curation for the pesticides analysed in liquid chromatography, Investigation.
Joana Vieira: Conceptualization, Resources.
Sandra Jorge: Conceptualization, Resources.
Jaime Gabriel Silva: Conceptualization, Resources.
Manuela Correia: Conceptualization, Supervision, Writing - Review & Editing.
Valentina F. Domingues: Conceptualization, Supervision, Writing - Review & Editing.
Cristina Delerue-Matos: Conceptualization, Supervision, Project administration, Funding acquisition, Writing - Review & Editing.
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Highlights
• The total pesticides concentration increased from the river source to the mouth.
• Organochlorine group and insecticide type were the most detected pesticides.
• Levels of μg/L were found for γ-HCH and aldrin in river and α-and γ-HCH and cypermethrin in effluent samples.
• The highest detection frequency found in influent was 50%, in river 67%, and in effluent 100%.
• The concentration of chlorpyrifos, cypermethrin, and HCH pesticides exceeds the environmental quality standards.
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Paíga, P., Sousa, S., Vera, J. et al. Multi-residue analysis of fifty pesticides in river waters and in wastewaters. Environ Sci Pollut Res 28, 66787–66803 (2021). https://doi.org/10.1007/s11356-021-15134-4
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DOI: https://doi.org/10.1007/s11356-021-15134-4