太阳光的光催化降解耐酸大红染料的试验

Experiment on Solar Photocatalytic Degradation of Soluble Dye 4BS(Red)

以黄砂作载体,TiO_2为催化剂,在铁离子存在的条件下,以太阳光为光源,用模拟工业浅池的光反应器,对有机染料直接耐酸大红4BS进行光催化降解的试验,对该染料降解及其影响因素进行了探讨。结果表明,在实验条件下,本系统对直接耐酸大红4BS有显著的光降解作用。当4BS浓度为25mg/L时,经0.5h光照,其降解率可达87％。

The photocatalytic degradation of soluble dye 4BS(red) solution has been studied by using natural sunlight geometries simulating shallow ponds. Titanium dioxide was used as photocatalyst, immobilized on sand and ferric ions. It showed that 4BS(red) was remarkably photolized under the condition of the experiment. An initial concentration of 25mg/L of 4BS(red) decayed to 3mg/L in about 30min of irradiation. The influence of parameters, such as initial concentration, pH of 4BS(red), concentration of ferric ions and the volume of 4BS(red) has also been studied.