负载氯化银的聚丙烯腈静电纺丝复合物对碘离子的吸附研究

Study on Adsorption of I^- Using Polyacrylonitrile Electrospinning Composites Doped with AgCl

采用静电纺丝工艺制备了负载AgCl的聚丙烯腈(PAN)纳米纤维,用SEM、XRD等技术对其结构进行了表征。考察了溶液pH、初始浓度、吸附时间等不同因素对材料吸附溶液中I-的影响,并对吸附过程的动力学和热力学进行了研究。研究结果表明,pH对吸附过程的影响较小;吸附过程符合准二级动力学模型,主要受化学作用控制。热力学参数表明升温有利于提高反应的自发趋势。该材料有望用于环境溶液中放射性核素碘的吸附分离。

Polyacrylonitrile(PAN)nanofibers loaded with AgCl were prepared by electrospinning process,and their physical structures and chemical properties of the nanofibers were characterized by SEM and XRD method.The effects of the pH,initial concentration and adsorption time on I^-in the adsorption solution were investigated,and the kinetics,thermodynamics of the adsorption process were studied.The results show that the pH has little effect on the adsorption process;the adsorption process conforms to the pseudo-second-order model and is mainly controlled by chemical action.The thermodynamic parameters show that the increase of temperature is beneficial to the increase of the spontaneous trend of the reaction.This material is expected to be used for the adsorption and separation of radionuclide iodide in environmental solutions.