Butyl xanthate in water was degraded by persulfate activated with iron and steel metallurgical slags,including steel slag,Ti-bearing blast-furnace slag and vanadium tailings.The effects of slag types and dosage,persulfate concentration and initial pH value on the degradation efficiency of butyl xanthate were analyzed.Two-way ANOVA was used to reveal the interaction characteristics between the factors.The results showed that the degradation rate of butyl xanthate increases with the increase of the slag dosage and persulfate concentration.Under the condition of 1 g/L slag,0.5 mmol/L persulfate,reaction time of 96 h,the degradation rate of butyl xanthate reaches 96.47%,97.70%and 95.12%with the application of steel slag,Ti-bearing blast-furnace slag and vanadium tailings,respectively.The optimal pH conditions for the above three slags are alkaline,near neutral and acid,respectively.The reactive constituents include non-free radical(1O2),SO4•-and HO• with the activation of steel slag.The activation of Ti-bearing blast-furnace slag is dominated by both 1O2 and HO•.Nevertheless,the dominant reactive constituent for the activation of vanadium tailings is 1O2.
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维普
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