Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China; College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China.
Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China; College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China; Hainan Harbin Institute of Technology Innovation Research Institute Co., Ltd., Hainan 572427, China; Harbin Engineering University Capital Management Co. Ltd, Harbin 150001, China.
J Colloid Interface Sci. 2022 Sep 15;622:109-116. doi: 10.1016/j.jcis.2022.04.065. Epub 2022 Apr 14.
The rapid development of nuclear energy and the accelerated consumption of uranium (U(VI)) ores have forced researchers to turn to marine U(VI) harvesting. However, the performance of marine U(VI) harvesting materials was challenged by the combination of ultralow concentrations of U(VI), high concentrations of various interfering ions and biofouling from abundant marine living organisms. Natural abundant hemp fibers (HFs) were adhered by mussel-inspired polydopamine microspheres (HFMPDA) during self-polymerization. Both HFs and PDA are derived from natural products with low-cost and eco-friendly properties to guarantee compatibility with biological marine environments. HFMPDA exhibits an outstanding distribution coefficient of 10.51 ± 0.51 L g for U(VI) and great fouling resistance. The coordination forms between the U(VI) ion and HFMPDA were investigated by density functional theory (DFT), and the antifouling property was simulated by molecular dynamics (MD) calculations. The adsorption capacity of HFMPDA is 128.43 ± 3.26 μg g, which is 1.75 and 6.05 times higher than that of HFPDA (only covered by PDA) and V(V), respectively, after immersion for 34 days in the Yellow Sea, China. These polydopamine microspheres adhered to HF will be a photothermal marine U(VI) harvesting material with enhanced selectivity and fouling resistance.
核能的快速发展和铀 (U(VI)) 矿石的加速消耗迫使研究人员转向海洋 U(VI) 采集。然而，海洋 U(VI) 采集材料的性能受到超低浓度 U(VI)、各种干扰离子的高浓度以及丰富的海洋生物的生物污垢的组合的挑战。天然大麻纤维 (HF) 在自聚合过程中被贻贝启发的聚多巴胺微球 (HFMPDA) 粘附。HF 和 PDA 均源自具有低成本和环保特性的天然产品，以保证与生物海洋环境的兼容性。HFMPDA 对 U(VI) 的分配系数高达 10.51 ± 0.51 L g，具有出色的抗污染性能。通过密度泛函理论 (DFT) 研究了 U(VI) 离子与 HFMPDA 之间的配位形式，并通过分子动力学 (MD) 计算模拟了抗污染性能。HFMPDA 的吸附容量为 128.43 ± 3.26 μg g，在中国黄海浸泡 34 天后，分别比仅涂覆有 PDA 的 HFPDA 和 V(V) 高 1.75 和 6.05 倍。这些粘附在 HF 上的聚多巴胺微球将成为一种具有增强选择性和抗污染性的光热海洋 U(VI) 采集材料。
