静电纺纳米纤维薄膜由于其高孔隙率和大比表面积,因而广泛应用于重金属离子吸附领域.利用层层自组装法,以聚对苯二甲酸乙二醇酯为基底制备了不同浓度和层数的壳聚糖/海藻酸钠复合纳米纤维膜,并用其处理水中铜离子(Cu2+).壳聚糖和海藻酸钠聚电解质溶液最佳浓度均为10.5 g/L,最适宜层数为10层,当溶液pH为6时,Cu2+去除率可达99.9％,使用时长达12 h以上.复合膜具有高效率和良好的亲水性等特点,具有很好的应用潜力.
Due to the large pore size and specific surface area,electrospun nanofiber membranes have comprehensive prospects in application in heavy metal ion adsorption.In this work,a polyethylene terephthalate nanofibrous membrane for copper ion removal supported on layer-by-layer assembly coatings was prepared via electrospinning.The dynamic adsorption property has been studied.The best conditions of the membrane for copper ion removal were as follow:the optimal concentration of chitosan/sodium alginate was 10.5 g/L and the most appropriate layers was 10 layers.The optimal pH for copper ion removal was 6.0,and the best removal efficiency in this experiment was 99.9 ％.The filtration time could last 12 h.It could be found that this nanofibrous membrane for copper ion dynamic adsorption was hydrophilic and high efficient.
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