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Evaluation of pesticide pollution in the Gualeguay Basin: An extensive agriculture area in Argentina by Tomás M. Mac Loughlin; María Leticia Peluso; Damián J.G. Marino is a Environmental Science article available to read on EtoBox.

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The current agricultural production model was established in the 1990s based on the use of genetically modified organisms and agrochemicals, mainly pesticides. Despite pesticide spread and prevalence, data on the associated concentrations in surface watercourses are comparatively scarce. The aim of this work was to evaluate to what extent the >20 years of agricultural activity with the use of pesticides has impacted on the Gualeguay-River basin, with respect to the different stream orders: the tributary streams and main channel. Thirteen sites within the lower Gualeguay basin were sampled once every season (autumn, winter, spring, and summer) in 2017–2018. The samples were analyzed by gas chromatography time-of-flight mass-spectrometry (GC-TOF-MS) and ultraperformance liquid chromatography tandem mass-spectrometry (UPLC-MS/MS). The most frequently detected pesticide was glyphosate along with its metabolite (aminomethyl)phosphonic acid (AMPA), at 82 % and 71 % of surface water samples and 97 % and 92 % of bottom sediments, respectively; followed by atrazine in 73 % of the water samples. The concentrations of these compounds, each in their respective matrices, did not present suffici

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Author

Tomás M. Mac Loughlin; María Leticia Peluso; Damián J.G. Marino

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Environmental Science (Physical Sciences)