Efficient iodine capture from water using a functionalized covalent organic framework.

ABSTRACT: The development of effective iodine adsorbents is a vital and challenging goal in radioactive waste management. In this study, we functionalized a covalent organic framework (COF-366) with amidoxime groups (AO) to create a new porous organic polymer (POP-AO), designed specifically for iodine capture. We systematically examined several key factors, including contact time, pH, initial iodine concentration, and the effect of competing ions on adsorption performance. Notably, POP-AO achieved an impressive iodine uptake of 909.1 mg g^-1, exceeding many previously reported materials. This high capacity mainly results from Lewis acid-base interactions between the electron-rich AO groups and electrophilic iodine. Kinetic studies indicated that the adsorption follows a pseudo-second-order

SUBMITTER: Jahantigh M 

PROVIDER: S-EPMC12919391 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature