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Adsorption of volatile polonium and bismuth species on metals in various gas atmospheres : part I : adsorption of volatile polonium and bismuth on gold

(2016) RADIOCHIMICA ACTA. 104(11). p.757-767
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Abstract
Polonium isotopes are considered the most hazardous radionuclides produced during the operation of accelerator driven systems (ADS) when lead–bismuth eutectic (LBE) is used as the reactor coolant and as the spallation target material. In this work the use of gold surfaces for capturing polonium from the cover gas of the ADS reactor was studied by thermochromatography. The results show that gaseous monoatomic polonium, formed in dry hydrogen, is adsorbed on gold at 1058 K. Its adsorption enthalpy was calculated as –250±7 kJ mol−1, using a Monte Carlo simulation code. Highly volatile polonium species that were observed in similar experiments in fused silica columns in the presence of moisture in both inert and reducing gas were not detected in the experiments studying adsorption on gold surfaces. PoO2 is formed in both dry and moist oxygen, and its interaction with gold is characterized by transport reactions. The interaction of bismuth, present in large amounts in the atmosphere of the ADS, with gold was also evaluated. It was found that bismuth has a higher affinity for gold, compared to polonium, in an inert, reducing, and oxidizing atmosphere. This fact must be considered when using gold as a material for filtering polonium in the cover gas of ADS.
Keywords
MOLTEN LEAD-BISMUTH, EQUILIBRIUM EVAPORATION, NUCLEAR CHEMISTRY, TRANSMUTATION, TEMPERATURE, GENERATION, ENTHALPIES, TELLURIUM, SURFACES, BEHAVIOR, Polonium, thermochromatography, ADS, MYRRHA

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Chicago
Maugeri, Emilio Andrea, Jörg Neuhausen, Robert Eichler, Rugard Dressler, Kim Rijpstra, Stefaan Cottenier, David Piguet, Alexander Vögele, and Dorothea Schumann. 2016. “Adsorption of Volatile Polonium and Bismuth Species on Metals in Various Gas Atmospheres : Part I : Adsorption of Volatile Polonium and Bismuth on Gold.” Radiochimica Acta 104 (11): 757–767.
APA
Maugeri, E. A., Neuhausen, J., Eichler, R., Dressler, R., Rijpstra, K., Cottenier, S., Piguet, D., et al. (2016). Adsorption of volatile polonium and bismuth species on metals in various gas atmospheres : part I : adsorption of volatile polonium and bismuth on gold. RADIOCHIMICA ACTA, 104(11), 757–767.
Vancouver
1.
Maugeri EA, Neuhausen J, Eichler R, Dressler R, Rijpstra K, Cottenier S, et al. Adsorption of volatile polonium and bismuth species on metals in various gas atmospheres : part I : adsorption of volatile polonium and bismuth on gold. RADIOCHIMICA ACTA. Walter de Gruyter GmbH; 2016;104(11):757–67.
MLA
Maugeri, Emilio Andrea et al. “Adsorption of Volatile Polonium and Bismuth Species on Metals in Various Gas Atmospheres : Part I : Adsorption of Volatile Polonium and Bismuth on Gold.” RADIOCHIMICA ACTA 104.11 (2016): 757–767. Print.
@article{8509601,
  abstract     = {Polonium isotopes are considered the most hazardous radionuclides produced during the operation of accelerator driven systems (ADS) when lead–bismuth eutectic (LBE) is used as the reactor coolant and as the spallation target material. In this work the use of gold surfaces for capturing polonium from the cover gas of the ADS reactor was studied by thermochromatography. The results show that gaseous monoatomic polonium, formed in dry hydrogen, is adsorbed on gold at 1058 K. Its adsorption enthalpy was calculated as –250±7 kJ mol−1, using a Monte Carlo simulation code. Highly volatile polonium species that were observed in similar experiments in fused silica columns in the presence of moisture in both inert and reducing gas were not detected in the experiments studying adsorption on gold surfaces. PoO2 is formed in both dry and moist oxygen, and its interaction with gold is characterized by transport reactions. The interaction of bismuth, present in large amounts in the atmosphere of the ADS, with gold was also evaluated. It was found that bismuth has a higher affinity for gold, compared to polonium, in an inert, reducing, and oxidizing atmosphere. This fact must be considered when using gold as a material for filtering polonium in the cover gas of ADS.},
  author       = {Maugeri, Emilio Andrea and Neuhausen, Jörg and Eichler, Robert and Dressler, Rugard and Rijpstra, Kim and Cottenier, Stefaan and Piguet, David and Vögele, Alexander and Schumann, Dorothea},
  issn         = {2193-3405},
  journal      = {RADIOCHIMICA ACTA},
  keywords     = {MOLTEN LEAD-BISMUTH,EQUILIBRIUM EVAPORATION,NUCLEAR CHEMISTRY,TRANSMUTATION,TEMPERATURE,GENERATION,ENTHALPIES,TELLURIUM,SURFACES,BEHAVIOR,Polonium,thermochromatography,ADS,MYRRHA},
  language     = {eng},
  number       = {11},
  pages        = {757--767},
  publisher    = {Walter de Gruyter GmbH},
  title        = {Adsorption of volatile polonium and bismuth species on metals in various gas atmospheres : part I : adsorption of volatile polonium and bismuth on gold},
  url          = {http://dx.doi.org/10.1515/ract-2016-2573},
  volume       = {104},
  year         = {2016},
}

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