高价锰、铁去除水中新兴有机污染物

Oxidative Degradation of Emerging Organic Contaminants in Aqueous Solution by High Valent Manganese and Iron

新兴有机污染物在水环境中广泛存在,对生态环境和人体健康都有潜在危害,如何去除水环境中的新兴有机污染物成为研究人员日益关心的问题。高价锰、铁,主要指高锰酸钾(Mn(Ⅶ),KMnO_(4))、高铁酸钾(Fe(Ⅵ),K_(2)FeO_(4)),是两类高效且环境友好的无机水处理药剂,可以高效地去除新兴有机污染物,因而备受人们关注。同时,高价锰、铁在降解新兴有机污染物过程中具有相同或者相近的化学性质和相近的化学行为。当前,关于高价锰、铁氧化降解新兴有机污染物的研究主要集中在构建动力学模型,解析中间价态的锰、铁的作用,阐述与其他物质或工艺联用时可能产生的自由基的作用及其在实际水体中的应用。本文综述并比较了高价锰、铁氧化降解新兴有机污染物的动力学模型、中间价态离子的作用、自由基的作用和在实际水体中的氧化特性。

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),KMnO_(4))and potassium ferrate(Fe(Ⅵ),K_(2)FeO_(4)),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.