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- W4360608461 abstract "Metal oxides play a critical role in the abiotic transformation of iodine species in natural environments. In this study, we investigated iodide oxidation by manganese dioxides (β-MnO2, γ-MnO2, and δ-MnO2) in frozen and aqueous solutions. The heterogeneous reaction produced reactive iodine (RI) in the frozen phase, and the subsequent thawing of the frozen sample induced the gradual transformation of in situ-formed RI to iodate or iodide, depending on the types of manganese dioxides. The freezing-enhanced production of RI was observed over the pH range of 5.0–9.0, but it decreased with increasing pH. Fulvic acid (FA) can be iodinated by I–/MnO2 in aqueous and frozen solutions. About 0.8–8.4% of iodide was transformed to organoiodine compounds (OICs) at pH 6.0–7.8 in aqueous solution, while higher yields (10.4–17.8%) of OICs were obtained in frozen solution. Most OICs generated in the frozen phase contained one iodine atom and were lignin-like compounds according to Fourier transform ion cyclotron resonance/mass spectrometry analysis. This study uncovers a previously unrecognized production pathway of OICs under neutral conditions in frozen environments." @default.
- W4360608461 created "2023-03-24" @default.
- W4360608461 creator A5041498647 @default.
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- W4360608461 date "2023-03-23" @default.
- W4360608461 modified "2023-10-10" @default.
- W4360608461 title "MnO<sub>2</sub>-Induced Oxidation of Iodide in Frozen Solution" @default.
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- W4360608461 doi "https://doi.org/10.1021/acs.est.3c00604" @default.
- W4360608461 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36952586" @default.
- W4360608461 hasPublicationYear "2023" @default.
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