Antimony release and volatilization from organic-rich and iron-rich submerged soils.

Autor: Caplette JN; Institute of Geography, University of Bern, Switzerland; Minnow Aquatic Environmental Services, Toronto, Canada. Electronic address: jaime.caplette@minnow.ca., Wilson SC; School of Environmental and Rural Science, University of New England, Armidale, NSW, Australia., Mestrot A; Institute of Geography, University of Bern, Switzerland. Electronic address: adrien.mestrot@giub.unibe.ch.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2024 May 15; Vol. 470, pp. 134230. Date of Electronic Publication: 2024 Apr 05.
DOI: 10.1016/j.jhazmat.2024.134230
Abstrakt: Antimony (Sb) is an poorly understood, increasingly common pollutant, especially in soils susceptible to waterlogging. We investigated the impact of waterlogging on Sb release, methylation, and volatilization from an organic-rich wetland soil and an iron (Fe)-rich floodplain soil in a 27-day microcosm experiment. The release of Sb into the porewaters of the organic-rich soil was environmentally relevant and immediate with waterlogging (3.2 to 3.5 mg L -1 ), and likely associated with a complex interplay of sulfide precipitation, sorption with organic matter and manganese (Mn) (oxyhydr)oxides in the soil. The release of Sb from the Fe-rich soil was likely associated with Fe-(oxyhydr)oxide reduction and immobilized due to co-precipitation with Fe-sulfides or as Sb-sulfides. Volatile Sb was produced from the soils after waterlogging. The organic-rich soil produced more volatile Sb (409 to 835 ng kg soil -1 ), but the Fe-rich soil volatilized Sb more efficiently. The negligible association of Sb volatilization with soil parameters indicates a more complex underlying, potentially microbial, mechanism and that antimony volatilization could be ubiquitous and not dependent on specific soil properties. Future works should investigate the microbial and physiochemical drivers of Sb volatilization in soils as it may be an environmentally relevant part of the biogeochemical cycle.
Competing Interests: Declaration of Competing Interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Susan Wilson reports financial support was provided by UNE Special Studies Program Travel Grant. Adrien Mestrot reports financial support was provided by European Commission Marie Sklodowska-Curie Actions. Adrien Mestrot reports financial support was provided by Swiss National Science Foundation. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Authors. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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