【摘要】 为了研究铁基催化剂催化臭氧氧化过程中降解有机物的有效成分以及催化氧化机理,以草酸为目标污染物,采用铁基催化剂催化臭氧氧化和单独臭氧氧化2种方法去除草酸。研究结果表明,前者对COD的去除率达到85%以上,显著优于单独臭氧氧化的去除效果。X射线衍射和电镜表征发现,γ型羟基氧化铁(γ-FeOOH)是铁基催化剂的有效催化成分。在酸性条件下,铁基催化剂催化臭氧氧化过程溶出的铁离子最终以γ-FeOOH形式沉淀,进而参与催化作用。电子顺磁共振波谱仪测定结果表明,·OH是催化臭氧氧化过程中重要的中间产物,是降解有机物的有效成分。更多还原

【Abstract】 In order to study the effective components of iron-based catalysts degrading organic matters during catalytic ozonation process, as well as the machanism of the catalytic oxidation, two methods: iron-based catalyst catalytic ozonation and single ozonation, were adopted to remove oxalic acid. The study results showed that,the removal rate of COD by iron-based catalyst catalytic ozonation reached above 85%, which was superior to the removal rate by single ozonation. The X ray diffraction and electronic speculum representation showed that, γ-FOOH was the effective catalytical component of iron-based catalysts. Under acidic condition, iron ions dissolved out from catalytic ozonation process by iron-based catalyst was finally precipitated in γ-FOOH form, and then participated in the catalysis. The measurement results of EPR spectrum showed that, ·OH was considered to be significant intermediates in the process of catalytic ozonation and also played an important role in the degradation of organic compounds.更多还原