改性聚丙烯腈纳米纤维在废水中重金属的吸附研究进展

Research Progress on Adsorption of Heavy Metals inWastewater by Modified Polyacrylonitrile Nanofibers

聚丙烯腈纳米纤维(PAN-nfs)具有大孔径、高孔隙率、大比表面积和较好的机械强度,已经用于溶液中含镉、铅、铬、汞、铀、银、铜等重金属离子的吸附。采用静电纺制备PAN-nfs,引入胺、羧基、亚胺等螯合基团对PAN-nfs进行改性,在保留纳米纤维原有的力学性能的同时又可提高PAN-nfs的吸附性能。文章综述了近5年PAN-nfs作为吸附剂对废水中重金属吸附作用的研究进展,提出了改性PAN-nfs领域研究的方向,对改性PAN-nfs吸附废水中重金属的研究具有参考价值。

Polyacrylonitrile nanofibers(PAN-nfs)with large pore size,high porosity,large specific surface area and good mechanical strength have been used for the adsorption of heavy metal ions such as cadmium,lead,chromium,mercury,uranium,silver and copper in solution.PAN-NFs were prepared by electrospinning,and the chelating groups such as amine,carboxyl and imine were introduced to modify PAN-NFs,which improved the adsorption performance of PAN while retaining the original mechanical properties of nanofibers.In this paper,the research progress of PAN-nfs as adsorbent to adsorption of heavy metals in wastewater in recent 5 years is reviewed.The research direction in the field of modified PAN-nfs is proposed,which has reference value for the research of the role of modified PAN-nfs in heavy metal wastewater treatment.