Cu^(2+)／Fe^(3+)／H_2O_2体系降解染料脱色的研究

Decoiorization of dyestuffs by Cu^(2+)/Fe^(3+)/H_2O_2 method

用Fe^(3+)/H_2O2、Cu^(2+)/H_2O_2、Cu^(2+)/Fe^(3+)/H_2O_2三种催化氧化体系,对四种不同结构的有机染料废水进行氧化脱色;考察初始pH值、反应时间及Fe^(3+)/Cu^(2+)比等因素对处理效果的影响;探讨重复利用Fe^(3+)/Cu^(2+)/H_2O_2体系中Fe^(3+)和Cu^(2+)。结果表明,四种染料被氧化脱色的难易程度为:酸性橙Ⅱ(偶氮染料)>中性红(醌亚胺染料)>碱性品红(三芳甲烷染料)>茜素紫(蒽醌染料);采用Fe^(3+)/Cu^(2+)/H_2O_2复合体系代替单一的催化离子,能有效适应pH值的变化;Fe^(3+)和Cu^(2+)可重复利用4～5次。

Three different catalytic oxidation methods were applied to treat wastewater containing four organic dyestuffs with different chemical structures, effects of initial pH value, reaction time and ratio of Fe^3＋ to Cu^2＋ on decolorization were discussed, reuse of Fe^3＋and Cu^2＋ in Fe^3＋/Cu^2＋/ H2O2 system was discussed. The results showed that Fe^3＋/Cu^2＋/H2O2 system could decompose alizarin violet easily, followed by magenta and neutral red, while acid orange II is the most difficult. Complicated system can effectively adapt to pH value change, Fe^3＋ and Cu^2＋ can be reused for 4 or 5 times.