Abstract:

The complex pollution of iron, manganese, and ammonia nitrogen in drinking water sources has become more and more common in recent years. The phenomenon of excessive ammonia nitrogen associated with iron and manganese in the surface water is seasonal, and mostly occurs in reservoir water, posing a threat to people’s daily drinking water safety. In this paper, the causes and hazards of compound pollution were analyzed, the traditional treatment methods and their limitations were briefly introduced. The origin of the iron-manganese active oxide film contacted catalytic oxidation method, the action mechanism of the oxide film, the preparation process of the mature filter material, the removal characteristics of pollutants and the recovery of catalytic activity was described. Two reaction mechanisms, the oxygen free radical theory of activating molecular oxygen and the oxidation theory of active manganese on the oxide surface, were analyzed. Finally, it pointed out that the research on the formation and action mechanism of the contact catalytic oxidation method still needs to be further studied. The further exploration was prospected and the idea of accelerating the start-up of coordination catalysis was proposed. It is believed that the method has great development potential and broad application prospects in the future.

Key words: chemical catalytic oxidation, iron, manganese, ammonia nitrogen, manganese trivalent, bimetallic catalysis

摘要：

近年来，饮用水源水中铁、锰、氨氮复合污染的问题越来越普遍。地表水中铁、锰伴生氨氮超标的现象呈现季节性，且多发生在水库水体中，对人们的日常饮用水安全造成威胁。本文首先分析了复合污染产生的原因、危害，简单介绍了常用的处理方法及局限性，阐述了铁锰活性氧化膜接触催化氧化法的由来、氧化膜的作用机理、成熟滤料的制备过程、对污染物的去除特性及催化活性恢复等内容。重点分析了目前已有的两种反应机理，分别是活化分子氧的氧自由基理论和氧化物表面活性锰的氧化理论。最后，指出了接触催化氧化法形成与作用机理的研究仍需深入，对下一步的探索进行了展望，提出了络合催化加速滤膜成熟的设想，并认为该方法在未来具有较大的发展潜力和广阔的应用前景。

关键词: 化学催化氧化, 铁, 锰, 氨氮, 锰(Ⅲ), 双金属催化