Quantification and characterization of glyphosate use and loss in a residential area

The Science of the Total Environment
Ting TangAnn van Griensven

Abstract

Urban runoff can be a significant source of pesticides in urban streams. However, quantification of this source has been difficult because pesticide use by urban residents (e.g., on pavements or in gardens) is often unknown, particularly at the scale of a residential catchment. Proper quantification and characterization of pesticide loss via urban runoff require sound information on the use and occurrence of pesticides at hydrologically-relevant spatial scales, involving various hydrological conditions. We conducted a monitoring study in a residential area (9.5 ha, Flanders, Belgium) to investigate the use and loss of a widely-used herbicide (glyphosate) and its major degradation product (aminomethylphosphonic acid, AMPA). The study covered 13 rainfall events over 67 days. Overall, less than 0.5% of glyphosate applied was recovered from the storm drain outflow in the catchment. Maximum detected concentrations were 6.1 μg/L and 5.8 μg/L for glyphosate and AMPA, respectively, both of which are below the predicted no-effect concentration for surface water proposed by the Flemish environmental agency (10 μg/L), but are above the EU drinking water standard (0.1 μg/L). The measured concentrations and percentage loss rates can be attr...Continue Reading

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Citations

Dec 12, 2018·Analytical and Bioanalytical Chemistry·Elena OkadaGraeme Allinson
Apr 4, 2021·International Journal of Environmental Research and Public Health·Suphaphat KwonpongsagoonSusan Woskie
May 12, 2021·Scientific Reports·Karlo Alves da SilvaCíntia Mara Ribas de Oliveira

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