The radioactive iodine in nuclear waste is increasingly polluting the environment, and the careful handling of radioactive iodine is crucial to the sustainable development of nuclear energy. In this paper, a imine-based Covalent organic polymer (COP) is prepared by aldimine condensation. The COP material is stable under 500 MPa ultra-high pressure with an average particle size of 100 μm. The adsorption process is in line with the Langmuir isotherm adsorption model control, and the maximum adsorption capacity is 3082.14 mg/g. The adsorption is a spontaneous endothermic process of increased entropy and raising the temperature is conducive to the adsorption process. The electron donor and iodine electron acceptor in the ligand form an electron transfer compound to achieve iodine adsorption.
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