Radon capture with silver exchanged zeolites
Artikel i vetenskaplig tidskrift, 2012

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.

Zeolite

clusters

adsorption

Adsorption

zeolites

xenon

v1

1981

argon

llens lr

p11

Radon

oxygen

nitrogen

ets-10

Författare

Hanna Hedström

Chalmers, Kemi- och bioteknik, Kärnkemi

Mark Foreman

Chalmers, Kemi- och bioteknik, Kärnkemi

Christian Ekberg

Chalmers, Kemi- och bioteknik, Kärnkemi

Henrik Ramebäck

Chalmers, Kemi- och bioteknik, Kärnkemi

Radiochimica Acta

0033-8230 (ISSN)

Vol. 100 395-399

DOI

10.1524/ract.2012.1932