光催化氧化法处理活性染料水溶液

在开放的光催化反应器中，以紫外光为光源，ＴｉＯ２ 为催化剂，考察了催化剂用量、反应液的起始质量浓度、反应液的起始ｐＨ 及Ｈ２Ｏ２ 的加入等因素对光催化氧化反应的影响。结果表明，在一定的光强度下，催化剂的投加量存在一最佳范围（２ ～４ ｇ／Ｌ） ；加入Ｈ２Ｏ２ 可加快染料分子的脱色速度，但对染料废水的ＣＯＤｃｒ的去除影响不大。同时，也考察了活性艳黄Ｘ－ ６Ｇ、活性艳蓝Ｘ－ ＢＲ 及活性艳红Ｘ－ ３Ｂ的ＣＯＤｃｒ的去除情况，反应７５ ｍｉｎ ，可以使上述３ 种染料的ＣＯＤｃｒ的去除率均达６０ ％ 以上。

Photocatalytic Oxidization of Dye Wastewater

In an open suspension photocatalyst reactor,with UV lamp to excite TiO 2 in the suspension of reactive red X-3B dye solution,a radical of oxide was produced and the dye was decolored.This study focused on some factors such as dosages of photocatalyst,initial concentration of reactive red X-3B,initial pH of the solution and addition of H 2O 2 on the decolorization efficicency of dye solution.The results showed that the dosage of catalyst has an optimum range(2-4 g/L).Strong acid or strong base did a favor for photocatalytic oxidation.Addition of a little amount of H 2O 2 didn't influence the removal of COD cr .At the same time,TiO 2 had the same high catalytic effect on reactive yellow X-6G and reactive blue X-BR.After 75 min the percentage of the removal of COD cr of all three dyes was about 60%.