H_2O_2光化学氧化技术对4BS和甲基橙的脱色研究

Study on Decolorization of 4BS and Methyl Orange by H_2O_2 Photochemical Oxidation

采用四种氧化技术:1.H_2O_2;2.芬顿;3.H_2O_2+紫外线;4.光芬顿;对常用染料直接耐酸大红4BS和甲基橙进行脱色研究。结果表明,光芬顿脱色效果最好,在10 min时,大红4BS和甲基橙脱色率分别高达99.56%和95.88%;H_2O_2(30%)投加量为0.2 mL时,大红4BS最适Fe^(2+)浓度为1 mg/L,甲基橙最适Fe^(2+)浓度为2 mg/L;中性有利于大红4BS降解,弱酸弱碱有利于甲基橙降解;实验比较了254 nm、308nm和365 nm三种紫外光源,发现254 nm紫外线对两染料降解最好。并对两染料进行了光谱分析。

The uses of four oxidation technology：1.H2O2; 2.Fenton; 3.H2O2＋UV; 4. Photo-Fenton. In printing and dyeing industry we use reagents such as Direct Fast Scarlet 4BS and methyl orange for decolorization study commonly. The study has found that the effect of decolorization was best using Photo-Fenton and the decolorization rates using scarlet 4BS and methyl orange were 99.56% and 95.88% respectively for ten minutes;The effort of decolorization was better when the dosage of Scarlet 4BS in H2O2 was 0.2 mL and the concentration of Fe2＋ was 1mg/L;The better effort also occured when the concentration of Fe2＋ was 2 mg/L using methyl orange .Neutral environment was conducive to the degradation of scarlet 4BS , when the environment became faintly acid or weakly alkaline, it was conducive to the degradation of methyl orange; The ultraviolet 254 nm wavelength was better for the degradation of two reagents .Spectroscopic analysis of the two dyes.