Patent ID: 9230700
Filing Date: 2016-01-05
CPC Classification: B01D,G21F

Claim Text:
1. A method for removing radon from a gas, the method comprising: (a) providing a liquid-gas contacting enclosure having a first shielded reservoir containing a working liquid in which radon is soluble; (b) passing a stream of gas containing radon through the liquid-gas contacting enclosure to cause some of the radon to leave the gas and dissolve in the working liquid; (c) removing the first reservoir of working liquid before the level of radon and radon decay progeny in the working liquid rises to a level making the working liquid a low-level radioactive waste; (d) replacing the first reservoir of working liquid with a second removable shielded reservoir of fresh working liquid; and (e) storing the first reservoir until at least 94 percent of the radon in the spent working liquid decays to lead.