Chen Guangyuan, Zhao Qian, Wang Zeru, Jiang Mei, Zhang Ling, Duan Tao, Zhu Lin
National Co-Innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang 621010, China; Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang 621010, China; State Key Laboratory of Environment-friendly Energy Materials, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, China.
National Co-Innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang 621010, China; Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang 621010, China; State Key Laboratory of Environment-friendly Energy Materials, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, China; School of Physics and Space Sciences, China West Normal University, Nanchong 637002, China.
J Hazard Mater. 2022 Jul 15;434:128859. doi: 10.1016/j.jhazmat.2022.128859. Epub 2022 Apr 6.
The efficient and safe capture of volatile radioiodine is of great significance in the reprocessing of spent fuel. Herein, the millimeter-scale pitch-based hyper-cross-linked porous polymers@polyethersulfone (PHCP@PES) composite beads were firstly synthesized for the removal of volatile iodine and methyl iodide. PHCP@PES beads exhibit high iodine vapor and methyl iodide uptake capacities of 770.0 mg/g and 186.5 mg/g, respectively. More impressively, the uptake capacities of PHCP@PES (744.5 mg/g for iodine vapor and 180 mg/g for methyl iodide) remained almost unchanged after treatment with 3 mol/L of nitric acid. The rich interconnected pore structure of PHCP@PES promotes the rapid physical capture of iodine and methyl iodide. Intrinsic features such as low-cost preparation, good mechanical properties as well as thermal, acid stability and excellent performance in iodine capture indicate that PHCP@PES can be used as a potential candidate for the removal of radioactive iodine in the exhaust gas stream of post-treatment plants.
在乏燃料后处理中，高效安全地捕获挥发性放射性碘具有重要意义。在此，首次合成了毫米级沥青基超交联多孔聚合物@聚醚砜（PHCP@PES）复合珠，用于去除挥发性碘和甲基碘。PHCP@PES珠分别表现出对碘蒸气和甲基碘的高吸附容量，分别为770.0 mg/g和186.5 mg/g。更令人印象深刻的是，在用3 mol/L硝酸处理后，PHCP@PES对碘蒸气的吸附容量（744.5 mg/g）和对甲基碘的吸附容量（180 mg/g）几乎保持不变。PHCP@PES丰富的相互连通的孔结构促进了碘和甲基碘的快速物理捕获。低成本制备、良好的机械性能以及热稳定性、酸稳定性和出色的碘捕获性能等内在特性表明，PHCP@PES可作为后处理厂废气流中放射性碘去除的潜在候选材料。
