Construction of N-Loaded Conjugated Polymer for Highly Effective Removal of Iodine in Organic Solution

Abstract

Efficient capture of radioiodine is critical during nuclear fuel reprocessing and nuclear accidents. The development of material with excellent adsorption properties of radioiodine has always been a significant challenge. Three kinds of N-loaded conjugated polymers were prepared using the solvothermal method by changing the N-group in pyrrole. The effect of nitrogen type on the structure of conjugated polymers was investigated by SEM, BET, FT-IR, XPS, and EPR. Despite their low special surface areas, iodine adsorption capacities could reach up to 737.37 mg/g in organic solution. The result shows that the adsorption capacity of alkyl tertiary amines for iodine in the conjugated system is better than that of amine ethyl tertiary amines and secondary amines. The adsorption mechanism of iodine on N-loaded conjugated polymer mainly is the interaction of charge transfer between iodine and N-aromatic in the organic solution.

Keywords: N-loaded, Conjugated polymer, Removal, Iodine