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Influence of glyphosate and aminomethylphosphonic acid on the mobility of trace elements in uncontaminated and contaminated agricultural soils

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Abstract

Glyphosate is one of the most widely used herbicides in the world. In addition to its herbicidal effect, glyphosate is a chelating agent that can form complexes with trace elements. Yet, agricultural soils can be contaminated with both organic and mineral substances, questioning the possible influence of glyphosate application on the trace element mobility. In this context, we specifically studied the extractability of trace elements in uncontaminated and metal-contaminated agricultural soils by adding glyphosate, formulated glyphosate, and aminomethylphosphonic acid (AMPA, a degradation product of glyphosate) in batch experiments from 0 to 100 mg L−1. Results showed that, on average, glyphosate enhanced the extractability of the elements considered (e.g., As, Cd, Cu, Pb, and Zn) at 20 and 100 mg L−1. Surprisingly, the uncontaminated soil highlighted the highest influence of glyphosate compared to the contaminated ones, likely resulting from a higher natural element extractability in the contaminated soils. Although formulated glyphosate presented an overall higher impact than unformulated glyphosate, it was evidenced that AMPA showed lower influence meaning that glyphosate degradation is beneficial to limit deleterious effects.

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Acknowledgements

Thanks to Benoît Pereira and Aubry Vandeuren for their help on the field work and providing relevant advice. We also thank Elodie Devos and Laurence Monin for the trace element measurement. Thanks to four anonymous reviewers for their valuable suggestions.

Funding

This work was financially supported by the Fonds speciaux de recherche (FSR) from UCLouvain and the Fonds pour la formation à la Recherche dans l’Industrie et l’Agriculture (FRIA) from the Fonds de la Recherche Scientifique (F.R.S.-FNRS).

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Nathan Bemelmans: conceptualization and design, chemical analysis, data collection and analysis, visualization, writing—original draft, funding acquisition; Bryan Arbalestrie: writing—review and editing; Hélène Dailly: chemical analysis, writing—review and editing; Etienne Bodart: chemical analysis, writing—review and editing; Yannick Agnan: supervision, conceptualization and design, data collection and analysis, visualization, writing—original draft, funding acquisition.

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Correspondence to Yannick Agnan.

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Bemelmans, N., Arbalestrie, B., Dailly, H. et al. Influence of glyphosate and aminomethylphosphonic acid on the mobility of trace elements in uncontaminated and contaminated agricultural soils. Environ Sci Pollut Res 30, 103983–103995 (2023). https://doi.org/10.1007/s11356-023-29660-w

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  • DOI: https://doi.org/10.1007/s11356-023-29660-w

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