The Surface Structure Change of Columbite-(Fe) Dissolution in H2SO4
نویسندگان
چکیده
The mineral surface structure and ions’ interaction were of significant interest to understanding dissolution reaction. In this study, X-ray photoemission spectroscopy combined with ICP emission spectrometer was used investigate the influence leaching reaction conditions 8 M dilute sulfuric acid 12 concentrated on chemical composition, (valence) state ion distribution Columbite-(Fe) (FeNb2O6). binding energy cations (Fe, Nb) bonding different anions (O2−, SO42−) ratio Fe3+/Fe2+ oxidation–reduction provided direct Fe Nb releasing from during leaching. results showed that Nb5+-O bond much smaller than Nb5+-SO4, decreased in sequence as < Fe2+-O Fe3+-O increased Fe3+-SO4 Fe2+-SO4 Nb5+-SO4. could be expressed formula: Fe-O + H2SO4 → Fe-SO4 H2O, Nb-O Nb-SO4 H2O. also revealed occurred more easily compared Fe. owed content H+ solution, increasing concentration promote dissolution. For mineral, oxidation potential play an effective role enhancement
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ژورنال
عنوان ژورنال: Minerals
سال: 2023
ISSN: ['2075-163X']
DOI: https://doi.org/10.3390/min13030445