Please use this identifier to cite or link to this item: http://hdl.handle.net/10174/36343

Title: Pesticide water variability and prioritization: The first steps towards improving water management strategies in irrigation hydro-agriculture areas
Authors: Alves-Ferreira, Júnia
García Vara, Manuel
Catarino, Adriana
Martins, Inês
Mourinha, Clarisse
Fabião, Marta
Costa, Maria João
Barbieri, Maria Vittoria
Lopez de Alda, Miren
Palma, Patrícia
Keywords: Water management
Pesticides
Issue Date: Mar-2024
Publisher: Elsevier
Citation: Alves-Ferreira, J., M. García Vara, A. Catarino, I. Martins, C. Mourinha, M. Fabião, M. J. Costa, M. V. Barbieri, M. Lopez de Alda, P. Palma, Pesticide water variability and prioritization: The first steps towards improving water management strategies in irrigation hydro-agriculture areas, Science of The Total Environment, Volume 917, 2024,https://doi.org/10.1016/j.scitotenv.2024.170304.
Abstract: The presence of pesticides in aquatic ecosystems poses significant risks to non-target organisms, necessitating monitoring and environmental risk assessment. This study aimed to evaluate the dynamics and environmental risk of pesticides in a hydro-agricultural area with intensive agricultural practices, in the Mediterranean region (South of Portugal). Seasonality and location influenced pesticide numbers and concentrations, with the highest levels observed during the dry season. Triazines, phenylureas, and organophosphates were the predominant pesticide classes, with terbuthylazine, bentazone, terbutryn, diazinon, and metolachlor exhibiting the highest detection frequencies (68 % to 72 %). Notably, 44 % of the quantified pesticides are no longer authorized in Portugal, with 33 % posing a high environmental risk. Some insecticides, including imidacloprid, methiocarb, and malathion, were occasionally detected at concentrations that posed high risks to the aquatic ecosystem (RQ ≥ 1). Irgarol, an algicide used in irrigation canals, presented a high risk in 91 % of the analysed samples. The study's distribution profile of pesticides revealed a significant transportation of these compounds from reservoirs to irrigation hydrants, establishing them as a secondary source of crop and environmental contamination. Additionally, the assessment of spatial distribution and environmental risk allowed for the identification of specific pollutants in different locations, prioritizing them based on their ecotoxicological risk to aquatic ecosystems. These findings reinforce the importance of implementing management measures at the level of hydro-agricultural areas, helping to stop the cycle of pesticide contamination. Only this type of strategy will make it possible to protect water quality, biodiversity and the health of citizens, contributing to the European Union's objectives of improving the condition of freshwater bodies and promoting the sustainable use of pesticides.
URI: https://www.sciencedirect.com/science/article/pii/S004896972400439X
http://hdl.handle.net/10174/36343
Type: article
Appears in Collections:FIS - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
CGE - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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