负载型TiO_2光催化去除氨氮的研究

Study on Removing Ammonia-nitrogen by Photocatalysis of Supported Titanium Dioxide

研究负载型TiO2光催化法去除氨氮的规律。采用溶胶-凝胶(sol-gel)法制备TiO2/天然沸石光催化剂。讨论温度、pH值、曝气量、催化剂投加量等因素对氨氮去除率的影响。结果表明,反应时间为3 h,pH值为10,光催化剂投加量为7 g/L、曝气量为0.2 m3/h、温度为32℃时,具有最佳氨氮去除效果,最大去除率为58.32%。

Ammonia-nitrogen removal by photocatalysis of supported titanium dioxide was studied.The titanium dioxide/zeolites photocatalyst was prepared by the sol-gel method.Effects of temperature,pH,aeration intensity,dosage of catalyst on ammonia-nitrogen removal rate were discussed.The results show that when reaction time is 3 h,pH is 10,photocatalyst dosage is 7 g/L,aeration intensity is 0.2 m3/h,temperature is 32 ℃,removal effect of ammonia-nitrogen is best,the highest removal rate is 58.32%.