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- W2916814005 abstract "Abstract After flotation cleaning of high-U coal from the Ganhe Mine in China, it was found that levels of V (561 μg/g), Cr (215 μg/g), Mo (159 μg/g), and U (234 μg/g) were still significantly enriched in the clean fraction. However, it was not initially clear whether these elements were associated with organic matter or occurred in fine-grained minerals. In this study, coal samples were analyzed by acid leaching and transmission electron microscopy coupled with energy dispersive spectroscopy (TEM + EDS). Our results showed the following: (1) V and Mo were weakly bonded to organic matter, whereas Cr and U were predominantly associated with organic matter, thereby indicating that Cr and U had a strong organic affinity; (2) the results of high-resolution TEM showed that U occurred in poorly crystalline nanoscale U Ti minerals in flotation-cleaned coals where the mineral was associated with organic matter; and (3) organic-bonded V and Mo were negatively correlated with organic S, but organic-bonded Cr and U were positively related to organic S. Through acid leaching, the contents of V, Cr, Mo, and U in the residue were still much higher than those in world hard coal. Thus, the use of flotation-cleaned Ganhe coals is not recommended to avoid environmental pollution and adverse effects." @default.
- W2916814005 created "2019-03-02" @default.
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- W2916814005 date "2019-05-01" @default.
- W2916814005 modified "2023-10-12" @default.
- W2916814005 title "Leaching behavior and organic affinity of potentially toxic elements V, Cr, Mo, and U in flotation-cleaned coal from the Ganhe Mine, China" @default.
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- W2916814005 doi "https://doi.org/10.1016/j.gexplo.2019.02.011" @default.
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