中文摘要：

采用水热法成功制备出了纳米TiO2,并在自制光催化反应装置中进行了对低氨氮含量废水去除效果的研究。探究了体系中催化剂含量、温度、p H等因素对去除NH3-N的影响,并考察了不同初始NH3-N含量下的去除情况及最终产物。结果表明,初始质量浓度为50 mg/L的NH3-N废水,在254 nm紫外灯的作用下,当催化剂用量为1.0g/L,废水初始p H=11.0,曝气量150 mL/min,温度为60℃,光照2 h,NH3-N去除率可达90%以上,常温下可达45%以上。反应最终产物硝态氮和亚硝态氮的含量均较低,体现了该催化剂具有将NH3-N转化为N2的良好光催化氧化选择性。此外,将该催化剂应用于生活污水的处理,发现对其中的NH3-N和TN具有较好的去除效果。

英文摘要：

Nano TiO2 photocatalyst was successfully prepared by using hydrothermal method. Their photocatalystic properties were evaluated in the removal of NH3-N under UV irradiation. The influence of initial content ofNH3-N, photocatalyst content, temperature, and pH on removing NH3-N was discussed. And the final products were detected. The optimum factors for NH3-N （mass concentration was 50 mg/L） removal are irradiated under 254 nm UV light, 1.0 g/L photocatalyst dose, initial pH 11 and 150 mL/min of aeration volume flow rate. The removal efficiency is up to 90% at 60 ℃ and over 45% at room temperature. The content of nitrate and nitrite in the final products were low. It reflects that the catalyst has good photocatalytic oxidation selectivity, which oxide NH3-N to N2. Meantime, the catalyst also shows effective removal ability of TN and NH3-N in domestic sewage.