Extracting uranium from seawater has become an important method to supplement the nuclear industry. Herein, we introduce a simple route to load conjugated microporous polymers onto collagen fiber membranes, resulting in a novel membrane adsorbent material (CMPA-F/CFM) for uranium capture. Its Langmuir adsorption capacity reaches 304.9 mg·g (at 318 K), with fast adsorption kinetic of 60 min, and excellent adsorption selectivity with = 4.69 × 10 mL·g under the temperature of 298 K, initial concentration of 50 mg·L, and pH = 7, thus allowing a satisfactory adsorption performance in a 7-day real ocean experiment with a uranium adsorption capacity of 1.25 mg·g. Furthermore, in continuous dynamic adsorption experiments, CMPA-F/CFM could treat up to 19.0 L·g of low-enriched uranium (LEU) solution (1 mg·L), with a uranium removal rate of up to 87.5 % (10 L of seawater). This study demonstrates broad potential application of membrane adsorption in extraction of low-enriched uranium.

中文翻译：

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通过在胶原纤维膜上固定共轭微孔聚合物从海水中有效提取铀

从海水中提取铀已成为补充核工业的重要方法。在此，我们介绍了一种将共轭微孔聚合物负载到胶原纤维膜上的简单途径，从而产生了用于铀捕获的新型膜吸附材料（CMPA-F/CFM）。其Langmuir吸附容量达到304.9 mg·g（318 K），吸附动力学快，可达60 min，在298 K、初始浓度50 mg·L时具有= 4.69 × 10 mL·g的优异吸附选择性， pH=7，在7天的真实海洋实验中获得了满意的吸附性能，铀吸附容量为1.25 mg·g。此外，在连续动态吸附实验中，CMPA-F/CFM可以处理高达19.0 L·g的低浓铀（LEU）溶液（1 mg·L），铀去除率高达87.5 %（10 L海水）。这项研究证明了膜吸附在低浓铀提取中的广泛潜在应用。