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The ozonization and the heterogeneous photocatalytic method are contemporarily applied for the oxidation of free cyanide ions. A batch photoreactor with immersed lamp was used for treating aqueous suspensions containing polycrystalline TiO 2 powders irradiated in the near-UV region. Air or ozone-air mixtures were used as oxidation reactants. At the used experimental conditions, the photoreaction...
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