Abstract: Xanthate in the process wastewater of iron ore flotation was selected as target substance.Study was made on treating the atomized Xanthate by a combination of activated carbon, ultraviolet light and ozone oxidation.The experiment investigated the influence of the pH value, ozone dosage, activated charcoal, atomization, free radical scavenger on the xanthate removal rate, and the two methods (atomization/O₃/UV/GAC and aeration/O₃/UV/GAC) were compared.The results show that, under the conditions of wastewater atomization, no pH adjustment, a reaction time of 35 minutes, and an ozone dosage of 300 mg/L, the xanthate removal rate was 96.3%, 15% higher than that by the process of aeration/O₃/UV/GAC.This process can be used as a deep treatment means for xanthate-containing wastewater.

Key words: Xanthate, Wastewater, Ozone, Concerted catalysis