The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 917, P. 170304 - 170304

Published: Jan. 25, 2024

The presence of pesticides in aquatic ecosystems poses significant risks to non-target organisms, necessitating monitoring and environmental risk assessment. This study aimed evaluate the dynamics a hydro-agricultural area with intensive agricultural practices, Mediterranean region (South Portugal). Seasonality location influenced pesticide numbers concentrations, highest levels observed during dry season. Triazines, phenylureas, organophosphates were predominant classes, terbuthylazine, bentazone, terbutryn, diazinon, metolachlor exhibiting detection frequencies (68 % 72 %). Notably, 44 quantified are no longer authorized Portugal, 33 posing high risk. Some insecticides, including imidacloprid, methiocarb, malathion, occasionally detected at concentrations that posed ecosystem (RQ ≥ 1). Irgarol, an algicide used irrigation canals, presented 91 analysed samples. study's distribution profile revealed transportation these compounds from reservoirs hydrants, establishing them as secondary source crop contamination. Additionally, assessment spatial allowed for identification specific pollutants different locations, prioritizing based on their ecotoxicological ecosystems. These findings reinforce importance implementing management measures level areas, helping stop cycle Only this type strategy will make it possible protect water quality, biodiversity health citizens, contributing European Union's objectives improving condition freshwater bodies promoting sustainable use pesticides.

Language: Английский