[3L01-05] Nuclide separation and recovery 1

[3L01] Mechanistic research on various types of radionuclides with tannic acid-type organic composite adsorbents in inland water

*Yu Tachibana¹, Shin Okumura², Yasuhiro Sakate¹, Masanobu Nogami³, Tatsuya Suzuki¹, Masao Nomura², Toshitaka Kaneshiki² (1. Lab. of Radiochem., Dept. of Nuclear System Safety Eng., Graduate School of Eng., Nagaoka Uni. of Technol., 2. Research Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 3. Department of Electrical & Electronic Engineering, School of engineering, Kindai University)

Keywords:Organic composite adsorbent, Adsorption-desorption mechanism, Radionuclide, Tannic Acid, River water

Novel tannic acid-type organic composite adsorbents combined with typical anion exchange resins (TOCA) were synthesized successfully and the adsorption behavior of cesium, strontium, iodine including iodide species etc. using the synthesized adsorbents have been studied in several types of river water at a temperature range of 278–318 K, compared with those of some typical resins. We have confirmed that IOCA can strongly adsorb with the examined species in river water. Based on the results, we have thermodynamically examined the adsorption-desorption mechanisms among them.