利用赤泥去除水中污染物的研究进展

Research progress on removing pollutants from water by red mud

赤泥作为一种大宗矿业固体废弃物,含有丰富的金属氧化物/金属氢氧化物,同时具有丰富的孔隙结构和较高的比表面积。经过简单改性处理后,可以作为一种低成本的水处理材料有效地去除水体中的污染物,同时实现以废治废的目的,具有良好应用前景。近些年来,利用赤泥去除水中污染物的研究受到了广泛关注,本文分析了赤泥的来源、组成和性质,介绍了赤泥改性活化的方法和活化机理,列举了应用赤泥去除不同污染物的实例,阐述了其去除机理,最后在以往研究的基础上,提出了利用赤泥去除水中污染物的不足之处和未来发展趋势。

Red mud,as a solid waste produced in the aluminia refining process,contains abundant metal oxides/hydroxides and has rich pore structure and high specific surface area.After simple modification,it can be used as a low-cost water treatment material to effectively remove pollutants from water.Meanwhile,it can achieve the purpose of“treatment of wastes with wastes”and has promising application prospects.In recent years,the use of red mud to remove pollutants from water has attracted wide attention.In this paper,the source,composition,and properties of red mud were analyzed,and the modification and activation methods and the underlying mechanism of red mud were also introduced in detail.The application studies of red mud to remove pollutants were listed,and the corresponding removal mechanisms were expounded.Finally,on the base of previous studies,the shortcomings and future development trend of using red mud to remove pollutants in water were put forward.