氧化石墨烯/天然高分子复合吸附材料在水处理中的应用

近年来,氧化石墨烯(GO)复合吸附材料在水处理方面得到了广泛研究.由GO和天然高分子组成的复合材料具有吸附能力强、机械稳定性好等优点,且表面改性的GO可以进一步提高其吸附稳定性和吸附能力.介绍了GO/天然高分子复合吸附材料的制备方法;总结了GO表面官能团,如巯基、氨基、羧基等对吸附材料吸附性能的影响;综述了GO与壳聚糖、纤维素、海藻酸钠、木质素等天然高分子形成的复合吸附材料对水中染料和重金属离子处理的应用;最后对GO/天然高分子复合吸附材料在实际应用中的发展方向提出了展望.

Graphene oxide /natural polymer composite adsorbents in water treatment

In recent years, graphene oxide composite adsorbents have been widely studied in wastewater treatment. The composite materials composed of graphene oxide and natural polymers have the advantages of strong adsorption capacity, good mechanical stability, etc. And the surface modified graphene oxide can further improve its adsorption stability and adsorption capacity. In this paper, the preparation methods of graphene oxide/natural polymer composite adsorbents are introduced. The effects of functional groups of graphene oxide such as sulfhydryl, amino and carboxyl on adsorption properties are summarized. Graphene oxide/natural polymer composite adsorbents are prepared by graphene and chitosan, cellulose, sodium alginate and lignin. Furthermore, the applications in water treatment of dyes and heavy metals are reviewed. Finally, the development direction in the practical application on the outlook is put forward.