1. Glyphosate contamination in European rivers not from herbicide application?
- Author
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Schwientek, M., Rügner, H., Haberlein, S.B., Schulz, W., Wimmer, B., Engelbart, L., Bieger, S., Huhn, C., Schwientek, M., Rügner, H., Haberlein, S.B., Schulz, W., Wimmer, B., Engelbart, L., Bieger, S., and Huhn, C.
- Abstract
Niet het gebruik van glyfosaat als onkruidbestrijder in de landbouw, maar afvalwater uit rioolwaterzuiveringen is een dominante bron van de glyfosaatconcentraties in Europese rivieren. Dat stellen onderzoekers van de Universiteit Tübingen in Duitsland. De onderzoekers brachten in een meta-analyse middels lange termijn-tijdreeksen de concentraties van glyfosaat en het afbraakproduct aminomethylfosfonzuur (AMPA) op ongeveer 100 locaties in de VS en Europa in kaart., The most widely used herbicide glyphosate contaminates surface waters around the globe. Both agriculture and urban applications are discussed as sources for glyphosate. To better delineate these sources, we investigated long-term time series of concentrations of glyphosate and its main transformation product aminomethylphosphonic acid (AMPA) in a large meta-analysis of about 100 sites in the USA and Europe. The U.S. data reveal pulses of glyphosate and AMPA when the discharge of the river is high, likely indicating mobilization by rain after herbicide application. In contrast, European concentration patterns of glyphosate and AMPA show a typical cyclic-seasonal component in their concentration patterns, correlating with patterns of wastewater markers such as pharmaceuticals, which is consistent with the frequent detection of these compounds in wastewater treatment plants. Our large meta-analysis clearly shows that for more than a decade, municipal wastewater was a very important source of glyphosate. In addition, European river water data show rather high and constant base mass fluxes of glyphosate all over the year, not expected from herbicide application.
- Published
- 2024