Abstract:

Using butyl titanate as raw material and COD removing rate as evaluation quota， TiO₂ which was prepared by sol-gel method has been used for treating furfural wastewater. The research results show that when pH is 2 -6， 0.06 g of TiO₂ and 3 mL of ClO₂ or H2O₂ are added into 150 mL of wastewater， being stirred continuously and illuminated under UV for 65 min， the COD removing rate can reach 67%. The photocatalytic degradation reaction includes two stages， and both of them accord with the first grade rule of reactive dynamics： R =1. 391 2t （t =0 -30 min）；R =0.434 9t +29.342 （t =30 -75 min）. In addition， after TiO₂ catalyst has been repeatedly used for 15 times， the photocatalytic efficiency does not change. It provides support for the industrial application of TiO₂ photocatalytic degradation to the treatment of furfural wastewater.

Key words: furfural wastewater, nano-TiO₂, photocatalytic degradation

摘要：

以钛酸丁酯为原料，采用溶胶凝胶法制备的TiO₂被用于处理糠醛废水。研究结果表明：pH=2~6的150mL废水中加入0.06gTiO₂和3mLClO₂或H₂O₂，在不断搅拌下，紫外光照65min，COD去除率可达到67%。此光催化氧化反应分两个阶段，均符合一级反应动力学规律：R=1. 3912t（t=0~30min）。R=0.4349t+29.342（t=30~75min）。而且TiO₂催化剂重复使用15次的光催化效果没有变化，为TiO₂光催化氧化处理糠醛废水工业化应用提供了技术支撑。

关键词: 糠醛废水, 纳米二氧化钛, 光催化氧化

CLC Number: 

• X703. 1