Acid orange Ⅱ dyes were degraded by hydroxyl radicals generated by cobalt/ascorbic acid/hydrogen peroxide system.The degradation effects of different degradation conditions(degradation time,degradation temperature,amount of feed liquid)on acid orange Ⅱ dyes were investigated.The results showed that the experimental effect of individual component degradation was not obvious.In the mixed system,the degradation rate could reach 91.25％when the optimal degradation conditions were 30 min,ascorbic acid was 0.075 mol,hydrogen peroxide was 0.063 mol,cobalt nitrate was 0.18 mmol,and the degradation temperature was 50℃.
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