Yu Qiang, Jiang Xiaohui, Cheng Zhengjun, Liao Yunwen, Duan Ming
Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University Nanchong Sichuan PR China 637009
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University Chengdu Sichuan PR China 610500
RSC Adv. 2021 Sep 10;11(48):30259-30269. doi: 10.1039/d1ra05223c. eCollection 2021 Sep 6.
The safe and effective capture and storage of iodine from nuclear waste is of great significance in industry. This article reports the preparation of a series of millimeter-sized ZIF-8@polyacrylonitrile composite beads with high specific surface area and porosity by the phase inversion method for iodine capture. The composite beads showed a higher capture capacity (4150 mg g) under excess iodine vapor. The amount of iodine adsorbed in the organic solution is also as high as 643 mg g, and the adsorption conforms to the Freundlich isotherm and the pseudo-second-order kinetic model. Moreover, composite beads also exhibit higher thermal stability (310 °C). Therefore, ZIF-8@polyacrylonitrile composite beads show great potential as a material for capturing and temporarily storing radioactive iodine.
从核废料中安全有效地捕获和储存碘在工业中具有重要意义。本文报道了通过相转化法制备了一系列具有高比表面积和孔隙率的毫米级ZIF-8@聚丙烯腈复合珠用于碘捕获。该复合珠在过量碘蒸气下表现出较高的捕获容量（4150 mg/g）。在有机溶液中吸附的碘量也高达643 mg/g，且吸附符合Freundlich等温线和准二级动力学模型。此外，复合珠还表现出较高的热稳定性（310℃）。因此，ZIF-8@聚丙烯腈复合珠作为捕获和临时储存放射性碘的材料具有巨大潜力。
