Marine and terrestrial contributions to atmospheric deposition fluxes of methylated arsenic species

Esther S. Breuninger; Julie Tolu; Franziska Aemisegger; Iris Thurnherr; Sylvain Bouchet; Adrien Mestrot; Rachele Ossola; Kristopher McNeill; Dariya Tukhmetova; Jochen Vogl; Björn Meermann; Jeroen E. Sonke; Lenny H. E. Winkel

doi:10.1038/s41467-024-53974-z

Marine and terrestrial contributions to atmospheric deposition fluxes of methylated arsenic species

Esther S. Breuninger (Korresp. Autor*in), Julie Tolu (Korresp. Autor*in), Franziska Aemisegger, Iris Thurnherr, Sylvain Bouchet, Adrien Mestrot, Rachele Ossola, Kristopher McNeill, Dariya Tukhmetova, Jochen Vogl, Björn Meermann, Jeroen E. Sonke, Lenny H. E. Winkel (Korresp. Autor*in)

Department für Umweltgeowissenschaften

Veröffentlichungen: Beitrag in Fachzeitschrift › Artikel › Peer Reviewed

Abstract

Arsenic, a toxic element from both anthropogenic and natural sources, reaches surface environments through atmospheric cycling and dry and wet deposition. Biomethylation volatilizes arsenic into the atmosphere and deposition cycles it back to the surface, affecting soil-plant systems. Chemical speciation of deposited arsenic is important for understanding further processing in soils and bioavailability. However, the range of atmospheric transport and source signature of arsenic species remain understudied. Here we report significant levels of methylated arsenic in precipitation, cloud water and aerosols collected under free tropospheric conditions at Pic du Midi Observatory (France) indicating long-range transport, which is crucial for atmospheric budgets. Through chemical analyses and moisture source diagnostics, we identify terrestrial and marine sources for distinct arsenic species. Estimated atmospheric deposition fluxes of methylated arsenic are similar to reported methylation rates in soils, highlighting atmospheric deposition as a significant, overlooked source of potentially bioavailable methylated arsenic species impacting plant uptake in soils.

Originalsprache	Englisch
Aufsatznummer	9623
Fachzeitschrift	Nature Communications
Jahrgang	15
Ausgabenummer	1
DOIs	https://doi.org/10.1038/s41467-024-53974-z
Publikationsstatus	Veröffentlicht - Dez. 2024

Fördermittel

We thank the Swiss National Science Foundation (project n\u00B0179104: E.S.B, J.T., S.B., L.H.E.W; project n\u00B0 TMSGI2_218303: F.A.; project n\u00B0PP00P2_163661: A.M.), the Swiss Polar Foundation (project DAWATEC: I.T., F.A., E.S.B., J.T., S.B., L.H.E.W.), Eawag and ETH Zurich (E.S.B, J.T., S.B., L.H.E.W, I.T., F.A., R.C., K.M.) as well as the German Research Foundation (DFG, ME 3685/5-1, project n\u00B0440953647: D.T., B.M.) for fundings. Samples were collected at the Pyrenean Platform for Observation of the Atmosphere P2OA, and we acknowledge the technical support from the UMS 831 Pic du Midi Observatory team. The authors gratefully acknowledge Heini Wernli (ETH Zurich) for helpful discussions and his feedback on a previous version of the manuscript. The authors thank Stefan Tanda, Walter Goessler, Elke Suess and Patrick Neuhaus for doing preliminary measurements of As speciation on a few previously collected rainwater and aerosol samples. The authors are grateful to their colleagues at Eawag and ETH Zurich, especially Bj\u00F6rn Studer for carrying out the dissolved organic carbon analysis, Elyssa Beyrouti for her help in the Py-GC/MS measurements and Caroline Stengel for general lab support.

ÖFOS 2012

104023 Umweltchemie
105208 Atmosphärenchemie
105906 Umweltgeowissenschaften

UN SDGs

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10.1038/s41467-024-53974-zLizenz: CC BY 4.0

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Breuninger, E. S., Tolu, J., Aemisegger, F., Thurnherr, I., Bouchet, S., Mestrot, A., Ossola, R., McNeill, K., Tukhmetova, D., Vogl, J., Meermann, B., Sonke, J. E., & Winkel, L. H. E. (2024). Marine and terrestrial contributions to atmospheric deposition fluxes of methylated arsenic species. Nature Communications, 15(1), Artikel 9623. https://doi.org/10.1038/s41467-024-53974-z

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abstract = "Arsenic, a toxic element from both anthropogenic and natural sources, reaches surface environments through atmospheric cycling and dry and wet deposition. Biomethylation volatilizes arsenic into the atmosphere and deposition cycles it back to the surface, affecting soil-plant systems. Chemical speciation of deposited arsenic is important for understanding further processing in soils and bioavailability. However, the range of atmospheric transport and source signature of arsenic species remain understudied. Here we report significant levels of methylated arsenic in precipitation, cloud water and aerosols collected under free tropospheric conditions at Pic du Midi Observatory (France) indicating long-range transport, which is crucial for atmospheric budgets. Through chemical analyses and moisture source diagnostics, we identify terrestrial and marine sources for distinct arsenic species. Estimated atmospheric deposition fluxes of methylated arsenic are similar to reported methylation rates in soils, highlighting atmospheric deposition as a significant, overlooked source of potentially bioavailable methylated arsenic species impacting plant uptake in soils.",

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AU - Breuninger, Esther S.

AU - Tolu, Julie

AU - Aemisegger, Franziska

AU - Thurnherr, Iris

AU - Bouchet, Sylvain

AU - Mestrot, Adrien

AU - Ossola, Rachele

AU - McNeill, Kristopher

AU - Tukhmetova, Dariya

AU - Vogl, Jochen

AU - Meermann, Björn

AU - Sonke, Jeroen E.

AU - Winkel, Lenny H. E.

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N2 - Arsenic, a toxic element from both anthropogenic and natural sources, reaches surface environments through atmospheric cycling and dry and wet deposition. Biomethylation volatilizes arsenic into the atmosphere and deposition cycles it back to the surface, affecting soil-plant systems. Chemical speciation of deposited arsenic is important for understanding further processing in soils and bioavailability. However, the range of atmospheric transport and source signature of arsenic species remain understudied. Here we report significant levels of methylated arsenic in precipitation, cloud water and aerosols collected under free tropospheric conditions at Pic du Midi Observatory (France) indicating long-range transport, which is crucial for atmospheric budgets. Through chemical analyses and moisture source diagnostics, we identify terrestrial and marine sources for distinct arsenic species. Estimated atmospheric deposition fluxes of methylated arsenic are similar to reported methylation rates in soils, highlighting atmospheric deposition as a significant, overlooked source of potentially bioavailable methylated arsenic species impacting plant uptake in soils.

AB - Arsenic, a toxic element from both anthropogenic and natural sources, reaches surface environments through atmospheric cycling and dry and wet deposition. Biomethylation volatilizes arsenic into the atmosphere and deposition cycles it back to the surface, affecting soil-plant systems. Chemical speciation of deposited arsenic is important for understanding further processing in soils and bioavailability. However, the range of atmospheric transport and source signature of arsenic species remain understudied. Here we report significant levels of methylated arsenic in precipitation, cloud water and aerosols collected under free tropospheric conditions at Pic du Midi Observatory (France) indicating long-range transport, which is crucial for atmospheric budgets. Through chemical analyses and moisture source diagnostics, we identify terrestrial and marine sources for distinct arsenic species. Estimated atmospheric deposition fluxes of methylated arsenic are similar to reported methylation rates in soils, highlighting atmospheric deposition as a significant, overlooked source of potentially bioavailable methylated arsenic species impacting plant uptake in soils.

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DO - 10.1038/s41467-024-53974-z

M3 - Article

SN - 2041-1723

VL - 15

JO - Nature Communications

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ER -

Marine and terrestrial contributions to atmospheric deposition fluxes of methylated arsenic species

Abstract

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ÖFOS 2012

UN SDGs

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