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Optimum 222Rn-adsorbing activated charcoals
1Environmental Measurements Laboratory, U.S. Department of Energy, New York, NY 10014-3621.
Health Physics
|June 1, 1992
Abstract:
Adsorptive and desorptive data are presented for 20 activated charcoal (AC) types that may be used in passive 222Rn sampling devices. Open-faced AC canisters were exposed for 3 d at room temperature to known radon and water vapor concentrations. Gamma measurements of radon progeny activity show that the optimum radon-adsorbing ACs are Calgon-PCB, Norit (RI, RBI, or PK), and, to a lesser degree, Witco-965 and ENV-EI-1220.