水中直接染料的多相催化脱色的试验条件研究

Catalytic Decolorization of Direct Dye in Aqueous Solution

实验结果表明 ,金属氧化物催化剂与活性炭和过氧化氢配合使用 ,对直接染料有很高的催化脱色率。反应进行迅速。以直接耐酸大红 4BS和直接红棕RN为代表的正交实验表明影响催化脱色作用的主要因素为催化剂 ,其次是活性炭和过氧化氢。直接深蓝L - 3RB ,直接铜蓝 2R ,直接黑L - 3BQ ,直接耐晒黄RS ,直接青莲RB等的最大脱色率为 92 .9%- 99.5 %

The experimental results show that the direct dyes can rapidly be decolorized in aqueous solution by metal oxide catalyst combined with activated carbon and hydrogen peroxide. Data obtained from orthogonal designing experiments indicated that metal oxide catalyst is the major factor in determining the rate of decolorization. The secondary factor is activated carbon or hydrogen peroxide. The decolorization efficiencies of dyes tested in aqueous solution are 92.9%-99.5% under suitable condition.