Interface assembly of specific recognition gripper wrapping on activated collagen fiber for synergistic capture effect of iodine

xlomafota13 shared this article with you from Inoreader Interface assembly of specific recognition gripper wrapping on activated collagen fiber for synergistic capture effect of iodine Via radioactive iodine Colloids Surf B Biointerfaces. 2021 Nov 19:112216. doi: 10.1016/j.colsurfb.2021.112216. Online ahead of print. ABSTRACT Efficient capture of radioactive iodine (129I, 131I) is of great significance in spent fuel treatment. In this paper, a new adsorbent named Catechin@ACF was successfully prepared through interface assembly of specific recognition gripper with plant polyphenols (catechin) on activated collagen fiber (ACF), and the catechin membrane with specif ic grip on iodine was successfully constructed on the surface of ACF. The results showed that the adsorbent assembled catechin membrane was rich in aromatic rings, hydroxyl groups and imine adsorption sites, and possessed specific recognition and capture characteristics of iodine. Moreover, the as-prepared Catechin@ACF showed excellent capture capacity for iodine vapor and iodine in organic solution with the maximum capture capacity of 2122.68 mg/g and 258.29 mg/g, respectively. In iodine-cyclohexane solution, the adsorption process was in according with the Pseudo first order kinetic and Langmuir isothermal model. In addition, the specific recognition and capture mechanism analysis indicated that the aromatic rings, phenolic hydroxyl groups and imine groups in the catechin membrane were the specific and effective grippers for iodine, and finally iodine formed a stable conjugated system with the adsorbent in the form of I- and I3-. Therefore, the as- prepared specific iodine capturer Catechin@ACF was expected to play a vital role in the capture of radioactive iodine in spent fuel off-gas because of its specific recognition, high capture capacity, large-scale preparation, and environment-friendly. PMID:34838421 | DOI:10.1016/j.colsurfb.2021.112216 View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.