A novel gelatin/PVA composite nanofiber band loaded with bayberry tannin (GPNB-BT) was prepared by electrostatic spinning and crosslinking for extraction of uranium (VI) from simulated seawater. The influential factors of tannin loaded on the nanofiber band were investigated in detail. Surface morphology and fiber diameter of GPNB-BT were studied by Scanning Electron Microscopy (SEM). Functional groups of GPNB-BT were investigated by Fourier Transform Infrared Spectrometer (FTIR). The adsorption process and mechanism of uranium on GPNB-BT was characterized by Energy Dispersive X-ray (EDX) and X-ray Photoelectron Spectroscopy (XPS). The results revealed that the BT had been stably solidified on the GPNB. Compared with other tannin-immobilized membranes, the nano-network structure of GPNB-BT with 200–400 nm diameter of fibers can promote solidification of tannins and improve adsorption capacity of GPNB-BT for uranium. The maximum adsorption capacity of the GPNB-BT for uranium is 170 mg/g at the optimal pH of 5.5 in 80 mg/L of initial uranium concentration and 1.4 μg/g even at extremely low initial concentration of 3 μg/L in the simulated seawater for 24 h. The GPNB-BT with good hydraulic properties, floatability and adsorption capacity for uranium is expected to be widely used in separation and enrichment of uranium in seawater and radioactive waste water.

通过静电纺丝和交联制备了负载杨梅单宁（GPNB-BT）的新型明胶/ PVA复合纳米纤维带，以从模拟海水中提取铀（VI）。详细研究了单宁负载在纳米纤维带上的影响因素。通过扫描电子显微镜（SEM）研究了GPNB-BT的表面形态和纤维直径。GPNB-BT的官能团通过傅立叶变换红外光谱仪（FTIR）进行了研究。通过能量色散X射线（EDX）和X射线光电子能谱（XPS）表征了铀在GPNB-BT上的吸附过程和机理。结果表明，BT已在GPNB上稳定固化。与其他单宁固定膜相比，GPNB-BT的纳米网络结构具有200-400 nm的纤维直径，可以促进单宁的固化并提高GPNB-BT对铀的吸附能力。GPNB-BT对铀的最大吸附容量在铀的初始铀浓度为80 mg / L时的最佳pH值为5.5时为170 mg / g，即使在模拟中为3μg/ L的极低初始浓度时也为1.4μg/ g。海水24小时。GPNB-BT具有良好的水力特性，可浮性和对铀的吸附能力，有望被广泛用于海水和放射性废水中铀的分离和富集。即使在模拟海水中初始浓度为3μg/ L的极低浓度下持续24 h仍为4μg/ g。GPNB-BT具有良好的水力特性，可浮性和对铀的吸附能力，有望被广泛用于海水和放射性废水中铀的分离和富集。即使在模拟海水中的初始浓度为3μg/ L的极低浓度下持续24 h仍为4μg/ g。GPNB-BT具有良好的水力特性，可浮性和对铀的吸附能力，有望被广泛用于海水和放射性废水中铀的分离和富集。