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铁锰复合氧化物混凝除微污染效能与机理

Keywords: 铁锰复合氧化物,混凝,界面特性,荷电特征,结构形貌,给水处理

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Abstract:

研究了铁锰复合氧化物(FeMnO)的界面特性、荷电特征及结构形貌,考察了FeMnO混凝效能,探讨了除污染机理.结果表明,FeMnO以δ-MnO2和氢氧化铁为主要成分,含有丰富的表面羟基,比表面积达146.22m2/g;在纯水体系中的零电荷点pH值约为8.0;FeMnO为尺寸不均的准球型微小颗粒,相互黏附成网状结构.FeMnO混凝使滤后浊度、TOC和UV254的去除率分别达到99.99%、42.25%和68.91%.其混凝除浊、除有机物的机制为吸附架桥、电性中和及网捕卷扫等共同作用的结果.

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