Preparation of nitrogen-rich hyper-cross-linked polymer and study of iodine adsorption properties
To address the issue of environmental contamination by radioactive iodine(12),this study synthesized a nitrogen-rich hyper-cross-linked polymer(DPCI-HCP)using a one-step Friedel-Crafts alkylation reaction.The polymer was subsequently employed for I2 adsorption in gaseous and aqueous settings.The results of the adsorption kinetics experiment using an I2-water solution revealed that DPCI-HCP conformed to the quasi-secondary kinetic model while binding to I2.DPCI-HCP exhibits remarkable potential for practical applications,with an exceptional aqueous I2 removal rate of 94.60％,an outstanding gaseous I2 adsorption capacity of 643％by mass fraction,and a retention rate of 93.73％of the initial adsorption capacity after five test cycles.The adsorption mechanism was investigated using infrared spectroscopy and X-ray photoelectron spectroscopy,confirming that the adsorption process is primarily influenced by chemisorption.
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