Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2015, Vol. 26 ›› Issue (4): 040303 doi: 10.13538/j.1001-8042/nst.26.040303


Adsorption of gaseous iodine-131 at high temperatures by silver impregnated alumina

CHENG Qing-Hui,LI Ze-Jun,CHU Tai-Wei   

  1. National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
  • Contact: CHU Tai-Wei
  • Supported by:

    Supported by National Natural Science Foundation of China (No. 21201013)

CHENG Qing-Hui, LI Ze-Jun, CHU Tai-Wei. Adsorption of gaseous iodine-131 at high temperatures by silver impregnated alumina.Nuclear Science and Techniques, 2015, 26(4): 040303     doi: 10.13538/j.1001-8042/nst.26.040303


To prevent radioactive iodides from releasing into the environment in an accident of a nuclear power plant, silver-impregnated alumina (Ag/Al2O3) was fabricated, and its performance of radioactive iodine adsorption from high-temperature gas was tested. The silver loadings on alumina were obtained by ICP-OES and the texture properties of Ag/Al2O3 were characterized by N2 adsorption-desorption. The Ag/Al2O3 was of reduced specific surface (107.2m2/g at 650 °C). Crystalline phases of Ag/Al2O3 were confirmed through XRD characterization. After calcination at 650 °C for 2 h, the crystalline phase of Ag/Al2O3 changed. The 131I- removal efficiency of Ag/Al2O3 was tested at 100, 250, 350, 450 and 650 °C, with good decontamination factor values for the radioactive iodine. Silver-impregnated alumina can be applied as adsorbents to remove radioactive iodine at high temperatures in nuclear accident.

Key words: Silver impregnated alumina, High temperature, Radioactive iodine, Adsorption, Decontamination factor