• • P1 achieves complete iodine adsorption within 5 minutes, with an adsorption rate constant (k_obs) of 18.92 g g−1 min−1, the highest reported among porous organic polymers, enabling rapid response in emergency scenarios.
• • P1 demonstrates 96.4% removal efficiency for radioactive 131I in dynamic flow-through experiments, significantly reducing radiation contamination in wastewater streams.
• • The adsorbents maintain performance across pH 2–10, indicating robustness under acidic and alkaline conditions typical of industrial effluents.
• • The polymers are easily regenerated, confirming reusability and cost-effectiveness for repeated use in iodine capture applications.