Bacteria affect Sb(III, V) adsorption and oxidation on birnessite

Du, Huihui; Tao, Jie; Yang, Rong; Lei, Ming; Tie, Boqing; Nie, Ning; Liu, Xin; Hu, Meng; Xu, Zelin

doi:10.1007/s11368-020-02607-1

Cited by 7 publications

(3 citation statements)

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“…64,65 The oxidation states of Mn included Mn(IV),(III) and(II). 60,66,67 The presence of Mn(III) species was attributed to the possible reaction of MnO 2 with Ga during the galvanic replacement reaction. 13,65 The O 1s spectra revealed three deconvoluted peaks centred at 532.3, 531.2, and 529.7 eV which were attributed to the -OH groups as in GaOOH, O defects in MnO 2 and -OH groups bound to Mn, and O-Mn-O or Ga-O overlapping, respectively.…”

Section: Paper Nanoscalementioning

confidence: 99%

Formation of inorganic liquid gallium particle–manganese oxide composites

et al. 2023

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Section: Paper Nanoscalementioning

confidence: 99%

Formation of inorganic liquid gallium particle–manganese oxide composites

et al. 2023

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“…Previous studies have shown that the fate of Sb in oxic to moderately reducing soils and sediments can be strongly controlled by interactions with Mn oxides. − In contaminated environments, Sb may coprecipitate with Mn oxides or interact via sorption processes with Mn oxide mineral phases. Hence, transformation of the host Mn oxides, such as modification of the crystal structure and surface chemical characteristics, can substantially influence the environmental fate and bioaccessibility of Sb species. − …”

Section: Introductionmentioning

confidence: 99%

“…Considerable focus has been placed on understanding Mn oxide transformation pathways and the consequences for coassociated contaminant behavior under a range of environmentally relevant conditions. ,,− However, to date, the inverse impact of metal(loid) contaminants, such as Sb, on such mineral transformations has received less attention. Although recent studies suggest that Sb loading itself may influence Fe(III) oxide transformation and recrystallization products, , there have been no systematic investigations into the influence of Sb loading on both Mn mineralogy and Sb behavior during the Mn(II)-induced transformation of metastable Mn(III,IV) minerals.…”

Section: Introductionmentioning

confidence: 99%

Antimonate Controls Manganese(II)-Induced Transformation of Birnessite at a Circumneutral pH

Karimian

Hockmann

Planer-Friedrich

et al. 2021

Environ. Sci. Technol.

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Manganese (Mn) oxides, such as birnessite (δ-MnO2), are ubiquitous mineral phases in soils and sediments that can interact strongly with antimony (Sb). The reaction between birnessite and aqueous Mn(II) can induce the formation of secondary Mn oxides. Here, we studied to what extent different loadings of antimonate (herein termed Sb(V)) sorbed to birnessite determine the products formed during Mn(II)-induced transformation (at pH 7.5) and corresponding changes in Sb behavior. In the presence of 10 mM Mn(II)aq, low Sb(V)aq (10 μmol L–1) triggered the transformation of birnessite to a feitknechtite (β-Mn(III)OOH) intermediary phase within 1 day, which further transformed into manganite (γ-Mn(III)OOH) over 30 days. Medium and high concentrations of Sb(V)aq (200 and 600 μmol L–1, respectively) led to the formation of manganite, hausmannite (Mn(II)Mn(III)2O4), and groutite (αMn(III)OOH). The reaction of Mn(II) with birnessite enhanced Sb(V)aq removal compared to Mn(II)-free treatments. Antimony K-edge extended X-ray absorption fine structure (EXAFS) spectroscopy revealed that heterovalent substitution of Sb(V) for Mn(III) occurred within the secondary Mn oxides, which formed via the Mn(II)-induced transformation of Sb(V)-sorbed birnessite. Overall, Sb(V) strongly influenced the products of the Mn(II)-induced transformation of birnessite, which in turn attenuated Sb mobility via incorporation of Sb(V) within the secondary Mn oxide phases.

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