[目的]研究改性纳米铁对水中莠去津的去除效果。[方法]采用液相还原法合成、并运用TH-904对纳米零价铁进行改性,采用SEM、TEM等手段对其进行表征及分析。[结果]改性纳米零价铁具有核壳结构,粒度分布均匀。当莠去津质量浓度为25.0 mg/L,改性纳米零价铁投加量为100 mg/L,pH值为4,20℃时,莠去津去除率可达70%以上。[结论]溶液pH值显著影响莠去津的去除,酸性条件有利其去除。纳米铁投加量和反应时间在一定范围内对莠去津的去除影响明显。 [Objective] The research aimed to study the effect of modified nano-iron on the removal of atrazine in water. [Method] The liquid phase reduction method was used to synthesize the nanosized zero valent iron with TH-904. The nanosized zero-valent iron was modified by means of SEM and TEM. [Result] The modified nano-zero-valent iron had a core-shell structure with uniform particle size distribution. When the concentration of atrazine was 25.0 mg / L, the dosage of modified zero-valent iron was 100 mg / L, the removal rate of atrazine was over 70% when the pH value was 4 and 20 ℃. [Conclusion] The pH value of solution significantly affected the removal of atrazine and the acidic conditions favored its removal. Nano-iron dosage and reaction time within a certain range of removal of atrazine significantly.