Iodine Adsorption of Shaped Silicalite-1 Silica Zeolite
Jia Zhou1, Pu Bai2,Tianchi Li1, Qi Chen1,Tian Lan1, Fang Liu1, Zhongwei Yuan1, Weifang Zheng1, Wenfu Yan3*, Taihong Yan1*
(1. China Institute of Atomic Energy, 102413,Beijing, China 2. Luoyang Jalon Micro-Nano New Materials Co., Ltd,471900, Luoyang, China 3. Jilin University,130012,Changchun,China) First corresponding author : Taihong Yan, e-mail: yanth@ciae.ac.cn Second corresponding author : Wenfu Yan, e-mail: YANW@JLU.EDU.CN
Abstract: Nuclear energy is one of the most promising clean energy sources in the future. The effective adsorption capture of iodine produced in the spent fuel reprocessing is an effective way to avoid the harm of iodine to the ecological environment and human health. Efforts have been made to devise materials, which can effectively capture radioactive iodine without being damaged by moisture and nitric acid. In the investigation described herein, a new kind of shaped silicalite-1 all-silica zeolite with a binder which was for direct industrial application other than power was synthesized and tested for iodine adsorption performance. Although the existence of binder in shaped silicalite-1 all-silica zeolite, it still exhibited high iodine adsorption capacities of 507 mg g-1, which was superior to inorganic adsorbents such as silver-containing zeolite mainly used currently, and was comparable with that of power silicalite-1 reported previously. Moreover, the shaped silicalite-1 all-silica zeolite could be cyclic utilization due to its reversible adsorption. All these show that the shaped silicalite-1 all-silica zeolite provides the possibility for the application of iodine adsorption in industrial post-processing conditions.
Key words: spent fuel reprocessing; iodine adsorption; shaped all-silica zeolite