In this study, a graphene oxide nanoribbons/chitosan (GONRs/CTS) composite membrane was successfully prepared by encapsulating CTS into GONRs, which were unzipped from multi-walled carbon nanotubes. The GONRs/CTS composite membrane so prepared was characterized using scanning electron microscopy, X-Ray diffraction and Fourier transform infrared spectroscopy. The effects of the experimental conditions such as the pH (2‒7), adsorbent dosage (10‒50 mg), experimental time (5 min–32 h), uranium concentration (25‒300 mg∙L–1), experimental temperature (298 K‒328 K) on the adsorption properties of the composite membrane for the removal of U(VI) were investigated. The results showed that the U(VI) adsorption process of the GONRs/CTS composite membrane was pH-dependent, rapid, spontaneous and endothermic. The adsorption process followed the pseudosecondary kinetics and Langmuir models. The maximum U(VI) adsorption capacity of the GONRs/CTS composite membrane was calculated to be 320 mg∙g⁻¹. Hence, the GONRs/CTS composite membrane prepared in this study was found to be suitable for separating and recovering uranium from wastewater.

在这项研究中，通过将CTS封装到从多壁碳纳米管解开的GONRs中，成功制备了氧化石墨烯纳米带/壳聚糖（GONRs / CTS）复合膜。使用扫描电子显微镜，X射线衍射和傅立叶变换红外光谱对如此制备的GONRs / CTS复合膜进行表征。实验条件的影响，例如pH（2‒7），吸附剂剂量（10‒50 mg），实验时间（5 min–32 h），铀浓度（25‒300 mg∙L-1），实验温度（298 K‒328 K）对复合膜对U（VI）的吸附性能进行了研究。结果表明，GONRs / CTS复合膜的U（VI）吸附过程是pH依赖性的，快速的，自发的和吸热的。吸附过程遵循伪二次动力学和Langmuir模型。计算得出GONRs / CTS复合膜的最大U（VI）吸附容量为320 mg∙g^-1。因此，发现本研究中制备的GONRs / CTS复合膜适用于从废水中分离和回收铀。