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Radon capture with silver exchanged zeolites

Hanna Hedström (Institutionen för kemi- och bioteknik, Kärnkemi) ; Mark Foreman (Institutionen för kemi- och bioteknik, Kärnkemi) ; Christian Ekberg (Institutionen för kemi- och bioteknik, Kärnkemi) ; Henrik Ramebäck (Institutionen för kemi- och bioteknik, Kärnkemi)
Radiochimica Acta (0033-8230). Vol. 100 (2012), 6, p. 395-399.
[Artikel, refereegranskad vetenskaplig]

To enable laboratory work with larger amounts of Ra-226 and its decay products, e.g., Rn-222 and its daughters, these need to be captured in order to avoid unnecessary alpha contamination of the laboratory work space and ventilation systems. In this study, radon gas was pumped through a column filled with the silver exchanged zeolite called "silver exchanged molecular sieves 13X" (Ag84Na2[(AlO2)(86)(SiO2)(106)]. xH(2)O). After exposure to radon, the radioactivity of the zeolite was measured repeatedly using high resolution gamma spectrometry. It was shown that radon was captured and retained in the silver exchanged zeolite. The zeolites' ability to retain radon was decreased by formation of metallic silver, caused by ionizing radiation. However, the zeolite was regenerated by heating and its radon capture ability was restored. The daughters of radon are not in gas phase and will hence stay on the column.

Nyckelord: Radon, Zeolite, Adsorption, adsorption, xenon, nitrogen, clusters, ets-10, oxygen, argon, llens lr, 1981, zeolites, v1, p11

Denna post skapades 2012-07-16. Senast ändrad 2016-07-25.
CPL Pubid: 160522


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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Kärnkemi (2005-2014)



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