One-step synthesis of Ag@polyaniline core-shell particles for efficient removal of radioactive iodine

A silver-based material coated with polyaniline (Ag@PANI) was successfully synthesized to effectively remove I2 and I-. Experimental results showed the sorption capacity of I2 by Ag@PANI reached 132 wt.%, and the I- uptake capacity reached 419.6 mg center dot g-1. Additionally, Ag@PANI could effectively remove up to 99.9% of low I--contaminated water, and the distribution coefficient (Kd) toward I- reaches 4.65 x 106 mL center dot g-1. Adsorption mechanism showed I2 and I- were immobilized on Ag@PANI by conversion to AgI. Moreover, electrostatic interactions might result in higher I- retention ability. Overall, Ag@PANI can be employed as promising adsorbent for the efficient removal of radioactive iodine.