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.

挥发性放射性碘的高效安全捕获对乏燃料后处理具有重要意义。在此，首先合成了毫米级沥青基超交联多孔聚合物@聚醚砜（PHCP@PES）复合珠粒，用于去除挥发性碘和甲基碘。PHCP@PES 微珠表现出高碘蒸气和甲基碘吸收能力，分别为 770.0 mg/g 和 186.5 mg/g。更令人印象深刻的是，PHCP@PES 的吸收能力（碘蒸气为 744.5 mg/g，甲基碘为 180 mg/g）在用 3 mol/L 硝酸处理后几乎保持不变。PHCP@PES 丰富的互连孔结构促进了碘和甲基碘的快速物理捕获。具有低成本制备、良好的机械性能以及热、