Identification of the sources and migration of antimony in karst terraces via Sb stable isotopes

Journal of Hazardous Materials, Год журнала: 2025, Номер unknown, С. 138570 - 138570

Опубликована: Май 1, 2025

Язык: Английский

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Antimony Isotope Fractionation during Adsorption on Iron (Oxyhydr)oxides

Environmental Science & Technology, Год журнала: 2023, Номер 58(1), С. 695 - 703

Опубликована: Дек. 23, 2023

The fate of antimony (Sb) is strongly affected by adsorption, yet Sb isotope fractionation and the associated mechanism have not been widely reported. Here we experimentally investigated process Sb(V) adsorption on iron (oxyhydr)oxides effects. occurs during (Δ123Sbsolution–mineral = 1.20 ± 0.02‰ for ferrihydrite 2.35 0.04‰ goethite). Extended X-ray absorption fine structure (EXAFS) analysis shows that via inner-sphere surface complexation, including mononuclear bidentate edge-sharing (2E) binuclear corner-sharing (2C) complexes. A longer atom distance Sb–Fe in leads to less than goethite. Gibbs free energy Mayer bond order were calculated based density functional theory (DFT) suggested strength bonding environment can be summarized as Sb(OH)6– > 2E 2C. In turn, indicates process. This study reveals onto (oxyhydr)oxides, providing a basis future isotopes further understanding mechanism.

Язык: Английский

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Antimony mobility in soil near historical waste rock at the world's largest Sb mine, Central China

The Science of The Total Environment, Год журнала: 2024, Номер 921, С. 171194 - 171194

Опубликована: Фев. 24, 2024

Язык: Английский

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Antimony isotopic fractionation during intensive chemical weathering of basalt in the tropics

Geochimica et Cosmochimica Acta, Год журнала: 2023, Номер 367, С. 29 - 40

Опубликована: Дек. 28, 2023

Язык: Английский

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Antimony isotopic fractionation induced by Sb(V) adsorption on β-MnO2

The Science of The Total Environment, Год журнала: 2024, Номер 933, С. 172972 - 172972

Опубликована: Май 10, 2024

Язык: Английский

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Sb stable isotope fractionation during adsorption onto birnessite: A molecular perspective from X-ray absorption spectroscopy and density functional theory

Geochimica et Cosmochimica Acta, Год журнала: 2024, Номер unknown

Опубликована: Сен. 1, 2024

Язык: Английский

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Antimony(V) sorption and coprecipitation with ferrihydrite: An examination of retention mechanisms and the selectivity of commonly-applied extraction procedures

Journal of Hazardous Materials, Год журнала: 2024, Номер 480, С. 136297 - 136297

Опубликована: Окт. 25, 2024

Язык: Английский

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Kinetic Fractionation of Antimony Isotopes during Reduction by Sulfide

ACS Earth and Space Chemistry, Год журнала: 2023, Номер 7(12), С. 2603 - 2612

Опубликована: Дек. 6, 2023

Stable isotope ratios of antimony (Sb) in the environment can provide valuable information about sources and processes such as redox transformations. To investigate fractionation when Sb(V) is chemically reduced by sulfide to Sb(III), experiments with 0.008 0.01 mM 0.009 6 at a pH 1 8 were performed. Experiments precipitated Sb-sulfide, whereas 7 8, Sb(III) remained solution. The product was enriched lighter isotope. isotopic (ε ≈ δinstantaneous – δreactant) for experiment −1.42 ± 0.04‰, those 5 ranged from −0.46 0.04 −0.62 0.04‰. small magnitude observed circumneutral may decrease utility Sb measurement reduction indicators natural systems, adsorption has been shown fractionate isotopes same direction similar (up 1.14‰) (Wasserman, 2020; Zhou et al., 2023).

Язык: Английский

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Antimony(V) behavior during the Fe(II)-induced transformation of Sb(V)-bearing natural multicomponent secondary iron mineral under acidic conditions

The Science of The Total Environment, Год журнала: 2023, Номер 912, С. 169592 - 169592

Опубликована: Дек. 26, 2023

Язык: Английский

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The uptake, transportation, and chemical speciation of Sb(III) and Sb(V) by wetland plants Arundinoideae (Phragmites australis) and Potamogetonaceae (Potamogeton crispus)

The Science of The Total Environment, Год журнала: 2024, Номер 918, С. 170606 - 170606

Опубликована: Фев. 3, 2024

Язык: Английский

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