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- W1974420957 abstract "The kinetics of oxidation of HSO3- ions in aqueous solutions in the presence of alpha-Fe2O3, alpha-FeOOH, beta-FeOOH and gamma-FeOOH is investigated. The oxidation of HSO3- follows a zero-order kinetics in suspensions of beta-FeOOH and gamma-FeOOH and a first-order kinetics for alpha-FeOOH and alpha-Fe2O3 systems. Some degradation of the iron(III) oxides takes place, evidenced by the presence of Fe(III) and Fe(II) in solution. Under illumination, the rate of HSO3- oxidation notably increases. In this case, the rate of oxidation of HSO3- by the four iron(III) oxides follows a kinetic equation of the type dx/dt=k(1-x)/x, where x is the fraction of HSO3- oxidized at time t. The rate constant of HSO3- photo-oxidation per unit of specific area for the different iron(III) oxides studied follows the order: alpha-Fe2O3>>gamma-FeOOH approximately beta-FeOOH>>alpha-FeOOH. Fe(II) and Fe(III) were also detected in solution after irradiation of the iron(III) oxide suspensions." @default.
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- W1974420957 date "1997-01-01" @default.
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- W1974420957 title "Oxidation of HSO3− in aqueous suspensions of α-Fe2O3, α-FeOOh, β-FeOOH and γ-FeOOH in the dark and under illumination" @default.
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- W1974420957 doi "https://doi.org/10.1016/s0269-7491(96)00148-0" @default.
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