Zheng Chunling, Zhao Wei, Tu Xiaoqian, Zhou Shaoqiang
College of Food Science and Light Industry, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China.
Institute of Textile Auxiliary and Ecological Dyeing Finishing, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China.
Polymers (Basel). 2025 Jan 20;17(2):243. doi: 10.3390/polym17020243.
A simple and non-chemical binding nanofiber (-CD/PA) adsorbent was obtained by electrospinning a mixture of -cyclodextrin (-CD) and polyacrylate (PA). The cationic dyes in wastewater were removed by the host-guest inclusion complex of the -cyclodextrin and the electrostatic interaction between the polyacrylate and the dyes groups. The influence of the content of -cyclodextrin on the surface morphology and adsorption capacity of the nanofiber membrane was discussed, and the optimized adsorption capacity of nanofiber adsorption material was determined. The adsorption capacity of nanofiber adsorbents for basic red 9, basic red 14, basic red 46, basic blue 9, basic yellow 19 and basic yellow 28 was 86.71 mg/g, 21.513 mg/g, 18.926 mg/g, 44.525 mg/g, 116.516 mg/g and 155.206 mg/g, respectively. The effects of different initial concentrations and pH values on the adsorption properties of adsorbent materials were studied. The kinetic analysis showed that the adsorption process of nanofibers for cationic dyes was more in line with the pseudo-second-order kinetic adsorption model. Moreover, nanofiber adsorbent could be easily separated from the dye solution and showed high recycling efficiency. These results indicated that the -cyclodextrin/polyacrylate composite nanofibers are expected to be recyclable adsorbents in dye wastewater treatment.
通过静电纺丝制备了一种简单的非化学结合纳米纤维（-环糊精/聚丙烯酸酯，-CD/PA）吸附剂，该吸附剂由-环糊精（-CD）和聚丙烯酸酯（PA）的混合物制成。废水中的阳离子染料通过-环糊精的主客体包合络合物以及聚丙烯酸酯与染料基团之间的静电相互作用被去除。讨论了-环糊精含量对纳米纤维膜表面形态和吸附容量的影响，并确定了纳米纤维吸附材料的最佳吸附容量。纳米纤维吸附剂对碱性红9、碱性红14、碱性红46、碱性蓝9、碱性黄19和碱性黄28的吸附容量分别为86.71 mg/g、21.513 mg/g、18.926 mg/g、44.525 mg/g、116.516 mg/g和155.206 mg/g。研究了不同初始浓度和pH值对吸附剂材料吸附性能的影响。动力学分析表明，纳米纤维对阳离子染料的吸附过程更符合准二级动力学吸附模型。此外，纳米纤维吸附剂能够很容易地从染料溶液中分离出来，并显示出高回收效率。这些结果表明，-环糊精/聚丙烯酸酯复合纳米纤维有望成为染料废水处理中的可回收吸附剂。
