In this study, a handmade forcespinning device was developed to prepare polyacrylonitrile (PAN) and polyacrylonitrile-graphene oxide (PAN-GO) nanofibers. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) were used to investigate the morphology and characterization of the nanofibers. Modified PANGO_(0.2%) nanofibers were obtained by reducing nitrile groups to amidoxime and then applied to uptake uranium ions from aqueous media. The maximum adsorption obtained for the adsorbent was 345.084 mg g⁻¹, which was obtained under optimal conditions of pH=5, contact time of 90 minutes and initial concentration of 25 mg L⁻¹. Also, the adsorption data were evaluated using Langmuir, Freundlich, Dubin and S-shaped isotherms. The results introduced the S-shaped isotherm model with a regression coefficient (R²) of 0.999 as a suitable model. In addition, kinetic studies represented that uranium adsorption for less than 45 min fits well with the pseudo-second-order model (R² =0.979). At times longer than 45 min, the nanofibers follow the S-shaped kinetics (R²=0.999). Eventually, negative ͉G (Gibbs free energy change) represents spontaneous adsorption of uranium ions by PAN-GO_(0.2%). The selectivity of PAN-GO nanofibers for the adsorption of competing ions was in accordance with the order Fe(II) < Ni(II) < CO(II) < U(VI) < V(V).

在这项研究中，开发了一种手工制作的力纺装置来制备聚丙烯腈 (PAN) 和聚丙烯腈-氧化石墨烯 (PAN-GO) 纳米纤维。使用扫描电子显微镜 (SEM) 和傅里叶变换红外光谱 (FTIR) 来研究纳米纤维的形态和表征。改性的 PANGO _(0.2%)纳米纤维是通过将腈基还原为胺肟然后用于从水性介质中吸收铀离子而获得的。吸附剂获得的最大吸附量为345.084 mg g ^-1，这是在pH=5、接触时间90分钟和初始浓度25 mg L ^{-1 的}最佳条件下获得的. 此外，吸附数据使用 Langmuir、Freundlich、Dubin 和 S 形等温线进行评估。结果引入了回归系数(R ² )为0.999的S形等温线模型作为合适的模型。此外，动力学研究表明，小于 45 分钟的铀吸附与伪二级模型（R ² =0.979）非常吻合。在超过 45 分钟的时间，纳米纤维遵循 S 形动力学（R ² =0.999）。最后，负 ͉G（吉布斯自由能变化）代表 PAN-GO _（0.2%）对铀离子的自发吸附。PAN-GO 纳米纤维对竞争离子吸附的选择性符合 Fe(II) < Ni(II) < CO(II) < U(VI) < V(V) 的顺序。