高价锰, 铁去除水中新兴有机污染物

Emerging organic contaminants are widely present in the waters and have potential threat to the ecosystem and human health. How to remove the emerging organic contaminants has become a growing concern for researchers. High valent manganese and iron, i. e. potassium permanganate ( Mn ( Ⅶ), KMnO₄ ) and potassium ferrate (Fe(Ⅵ), K₂FeO₄), are two effective inorganic chemicals for decomposing emerging organic contaminants in water treatment. Permanganate and ferrate are environmentally friendly, and have been drawing more and more attention due to their high efficiency. Permanganate and ferrate have similar chemical properties and close behavior in the removal of emerging organic contaminants. Recent studies on the oxidative degradation of emerging organic contaminants by permanganate and ferrate mainly focus on the kinetic models, the role of manganese- and iron-intermediates, the role of free radicals generated when permanganate and ferrate are combined with other chemicals or processes, and their application in real waters. Therefore, this paper summarizes the reaction kinetics of permanganate and ferrate, and compares the roles of permanganate- and ferrate-intermediates and free radicals, and their performance in real waters.