Super Cost‐Effective and Scalable Imine‐Based Sorbent With Field Attraction and In Situ Fixation for Efficient Capture of Diverse Iodine Species under Industrial Conditions
Abstract
ABSTRACT Gaseous radioiodine under industrial conditions (typically ≥ 150 °C, ≥ 90% humidity) poses great challenges on conventional porous sorbents, where elevated molecular kinetic energy and iodine aerosol formation lead to desorption and pore blockage, resulting in a significant reduction in capture capacities. Here, we propose an electrostatic field attraction and in situ encapsulation synergistic strategy and demonstrate its effectiveness in an imine‐based adsorbent, IPIN‐P@MF. In this system, the polarized carboxylate groups in ionic polyimine network (IPIN) create a strong electrostatic field for directional iodine attraction, while multiple nitrogen sites and carbonyl‐rich additives enable chemical fixation through N ‐methylation and complexation. This dual mechanism effectively addresses the limitations of conventional pore confinement approaches, allowing IPIN‐P@MF to achieve a record‐high dynamic I 2 uptake capacity of 160.7 wt.% at 150°C and 90% RH, and maintain filtration efficiency above 99.8% under simulated industrial conditions. The entire IPIN‐P@MF can be fabricated via solution processing under mild ambient conditions, offering remarkable cost‐effectiveness (0.126 USD per gram of iodine captured) and scalability (dimensions >1.8 meters), thereby providing a practical and scalable pathway for radioactive iodine abatement in nuclear off‑gas treatment and emergency response.
Article Details
Authors (11)
Guo‐Hao Zhang
CAEA Innovation Center of Nuclear Environmental Safety Technology College of Nuclear Science and Technology Southwest University of Science and Technology Mianyang China
Wen‐Qi Zhang
State Key Laboratory of Radiation Medicine and Protection School of Radiation Medicine and Protection Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions Soochow University Suzhou China
Xue‐Yan Ren
CAEA Innovation Center of Nuclear Environmental Safety Technology College of Nuclear Science and Technology Southwest University of Science and Technology Mianyang China
Liu‐Yuan Fu
CAEA Innovation Center of Nuclear Environmental Safety Technology College of Nuclear Science and Technology Southwest University of Science and Technology Mianyang China
Lin‐Wei He
State Key Laboratory of Radiation Medicine and Protection School of Radiation Medicine and Protection Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions Soochow University Suzhou China
Qiu‐Hong Zhu
CAEA Innovation Center of Nuclear Environmental Safety Technology College of Nuclear Science and Technology Southwest University of Science and Technology Mianyang China
Lin‐Ze Xiao
CAEA Innovation Center of Nuclear Environmental Safety Technology College of Nuclear Science and Technology Southwest University of Science and Technology Mianyang China
Yun‐Long Zhang
College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education Shandong Normal University Jinan 250014 P.R. China
Rui Li
Long Chen
Department of Chemistry, Frontiers Science Center for New Organic Matter and State Key Laboratory of Advanced Chemical Power Sources, College of Chemistry
Xiaoqin Nie
CAEA Innovation Center of Nuclear Environmental Safety Technology College of Nuclear Science and Technology Southwest University of Science and Technology Mianyang China