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

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

doi:10.13538/j.1001-8042/nst.26.040303

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

NUCLEAR CHEMISTRY, RADIOCHEMISTRY, RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE | Updated：2021-01-20

- Adsorption of gaseous iodine-131 at high temperatures by silver impregnated alumina
- Nuclear Science and Techniques Vol. 26, Issue 4, Article number: 040303(2015)
- Affiliations：
  
  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
- Author bio：
  
  Corresponding author, twchu@pku.edu.cn
- Funds：
- DOI：10.13538/j.1001-8042/nst.26.040303
  CLC：
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Qing-Hui CHENG, Ze-Jun LI, Tai-Wei CHU. Adsorption of gaseous iodine-131 at high temperatures by silver impregnated alumina. [J]. Nuclear Science and Techniques 26(4):040303(2015)
DOI：

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

摘要

Abstract

To prevent radioactive iodides from releasing into the environment in an accident of a nuclear power plant, silver-impregnated alumina (Ag/Al,2,O,3,) 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/Al,2,O,3, were characterized by N,2, adsorption-desorption. The Ag/Al,2,O,3, was of reduced specific surface (107.2 m,2,/g at 650 ℃). Crystalline phases of Ag/Al,2,O,3, were confirmed through XRD characterization. After calcination at 650 ℃ for 2 h, the crystalline phase of Ag/Al,2,O,3, changed. The ,131,I- removal efficiency of Ag/Al,2,O,3, was tested at 100, 250, 350, 450 and 650 ℃, 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.

关键词

Keywords

Silver impregnated aluminaHigh temperatureRadioactive iodineAdsorptionDecontamination factor

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