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利用静电纺丝技术制备了具有较高比表面积的聚丙烯腈纳米纤维膜,经双硫腙改性分离富集水中的重金属,采用扫描电镜(SEM)、红外光谱(IR)分析测试手段进行了表征。以铅为例用电镜跟踪观察吸附过程中纤维膜表面形貌变化;以原子吸收光谱(AAS)研究了纤维膜的吸附性能,考察了pH、吸附时间等相关参数对吸附的影响。这种纤维膜吸附速度快,在碱性环境下pH为8.0左右对Pb(II)吸附效果较好,最大吸附量可达到79.28mg/g,并对其进行脱附研究,洗脱时间较短,可重复利用。
The polyacrylonitrile nanofibers with high specific surface area were prepared by electrospinning technique. The heavy metal was separated and enriched by dithizone modification. The scanning electron microscopy (SEM) and infrared spectroscopy (IR) Characterization. Lead was used as an example to observe the morphological changes of the surface of the membrane during the adsorption process by electron microscopy. The adsorption properties of the membrane were investigated by atomic absorption spectroscopy (AAS). The effects of pH and adsorption time on the adsorption were investigated. The adsorption rate of Pb (II) was good at a pH of about 8.0 in alkaline environment. The maximum adsorption capacity of this membrane was 79.28mg / g, and its desorption was studied. The elution time was short , Reusable.