铁锰氧化物/碳基复合材料的制备及其对水中砷的去除

Preparation of Iron and Manganese Oxides /Carbon Composite Materials for Arsenic Removal from Aqueous Solution

砷污染问题日益严峻,已威胁到人类的健康,因此,解决水环境中的砷污染问题迫在眉睫。近年来,铁锰氧化物/碳基复合材料因其吸附性能优越和易分离再生等优点而受到广泛的关注。尤其是纳米碳管、石墨烯等新型纳米碳基材料,其比表面积大并具有丰富的官能团,为铁/锰氧化物的负载创造了良好的条件,在其表面可以形成粒径更细的铁/锰氧化物,为砷的吸附提供了更多的吸附点位。本文重点介绍了国内外铁锰氧化物/碳基复合材料的制备方法并比较了各种制备方法的优缺点;讨论了铁锰氧化物/碳基复合材料除砷效果以及其吸附机理;分析了铁锰氧化物/碳基复合材料的再生性能并指出其在实际应用中尚存在的问题,最后展望了该材料处理水体中砷的发展方向。

Arsenic pollution has posed increasingly severe threat to human health, therefore, dealing with the problem of arsenic contamination in water bodies is extremely urgent. Iron and manganese oxides/carbon composite materials, characterized in superior adsorption properties, strong performance of separation and regeneration potentials, have received more and more concern in recent years. Especially, novel carbon-based nano materials such as carbon nanotubes and graphene have high specific surface area and possess a wealth of surface functional groups, providing good conditions for the loading of iron/manganese oxides. Moreover, finer particle size of iron/manganese oxides can be formed on the surface of carbon-based materials, offering more adsorption sites for the adsorption of arsenic. In this paper, we have purposively focused on the synthesis methods of Fe-Mn oxides/carbon composite materials from the domestic and foreign research programs. The advantages and disadvantages of the synthesis of this material were compared, and the removal effects and adsorption mechanisms of arsenic by this adsorbent were elucidated. Furthermore, the regeneration potential of iron and manganese oxides/carbon composite materials was analyzed and the existing deficiencies of this material in practical application were proposed. Finally, the development trend of arsenic removal in water bodies by this new composite material was forecasted.