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- W2037227962 abstract "Abstract The kinetics of leaching pyrite with hydrogen peroxide in sulphuric acid were investigated. The parameters studied were: stirring speed, temperature, particle size and concentrations of H 2 O 2 and H 2 SO 4 . The effects of SO 4 2− and H + additions were also investigated. The leaching rate decreases with increasing stirring speed and H 2 SO 4 concentration. The kinetics of pyrite dissolution are described by means of the surface reaction control shrinking core model. This is supported by an activation energy of 68 kJ/mol and a linear relationship between the rate constant and the inverse of the particle radius. The consumption of H 2 O 2 is greater than that stoichiometrically required, due to its catalytic decomposition. The leaching rate is first order with respect to H 2 O 2 . Additions of SO 4 2− have a negative influence on the leaching rate, whereas H + additions have a beneficial effect. A reaction mechanism is proposed." @default.
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- W2037227962 title "Leaching of pyrite with hydrogen peroxide in sulphuric acid" @default.
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- W2037227962 doi "https://doi.org/10.1016/s0304-386x(96)00096-5" @default.
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