Mahmood Urwa, Abid Sharjeel, Qadir Bilal, Nazir Ahsan, Hussain Tanveer
Electrospun Materials & Polymeric Membranes Research Group, National Textile University, Faisalabad, Pakistan.
Turk J Chem. 2021 Nov 10;46(2):342-355. doi: 10.3906/kim-2107-67. eCollection 2022.
Herein, the fabrication of electrospun nanocomposites, using polyacrylonitrile nanofibers (PNF) modified with nano-bentonite and fly ash, is explained. Further, the use of electrospun adsorbent for the remediation of Pb (II) ions from water has been explored. Pristine PNF and nanocomposites were characterized using SEM, EDX, and FTIR to analyze surface topology, elemental composition, and functional groups, respectively. The adsorptive behavior of developed adsorbents was investigated using the effects of dosage, initial concentration, time, and temperature. Pseudo-second order kinetics fit well with experimental data and the adsorption followed intra-particle diffusion. The thermodynamics study confirmed spontaneous endothermic adsorption of the heavy metal. Nanocomposites-based adsorbents showed improved adsorption capacity for Pb (II) ions compared to pristine PNF.
本文阐述了使用经纳米膨润土和粉煤灰改性的聚丙烯腈纳米纤维（PNF）制备电纺纳米复合材料的过程。此外，还探索了使用电纺吸附剂从水中去除Pb（II）离子的方法。分别使用扫描电子显微镜（SEM）、能量散射X射线光谱仪（EDX）和傅里叶变换红外光谱仪（FTIR）对原始PNF和纳米复合材料进行表征，以分析表面拓扑结构、元素组成和官能团。通过研究剂量、初始浓度、时间和温度的影响，考察了所制备吸附剂的吸附行为。准二级动力学与实验数据拟合良好，且吸附遵循颗粒内扩散。热力学研究证实了重金属的自发吸热吸附。与原始PNF相比，基于纳米复合材料的吸附剂对Pb（II）离子表现出更高的吸附容量。
