微波辅助紫外光催化氧化降解吲哚的研究

Degradation of indole by microwave assisted UV-catalyzed oxidation

采用微波辅助紫外光催化氧化工艺处理吲哚污染物,并探讨了溶液pH值、TiO2用量、曝气时间和吲哚初始浓度对吲哚降解效果的影响。研究结果表明,曝气/MW/UV/TiO2系统中,当pH值为7、吲哚初始质量浓度为50 mg/L、催化剂质量浓度为0.2 g/L、曝气时间为60 min时,吲哚的降解效果最好,降解率为81.8%。微波辅助紫外光催化氧化工艺大大提高了TiO2的光催化性能,对难降解有机物吲哚具有良好的处理效果,对于解决目前日益严重的环境污染问题,具有一定的研究和实用价值。

Microwave assisted UV-catalyzed oxidation process was used to treat indole-containing pollutants, the effects of solution pH value, TiO2 dosage, aeration time and initial mass concentration of indole on indole degradation were discussed. The study results showed that, in aeration/MV/UV/TiO2 system, when the pH value was 7, the initial mass concentration of indole was 50 mg/L, the dosage of catalyst was 0.2 g/L, the aeration time was 60 min, the removal efficiency of indole reached the highest, which was 81.8%. As microwave assisted UV-catalyzed oxidation process could greatly improve the photocatalytic property of TiO2 and had a good effect on hard-degradable organic indole removal, it was considered to have certain research and practical values for increasingly serious environmental pollution problems solving.