title: Optimum 222Rn-adsorbing activated charcoals.
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.
authors.affiliation: Environmental Measurements Laboratory, U.S. Department of Energy, New York, NY 10014-3621.
authors.forename: S C
authors.initials: SC
authors.lastname: Scarpitta
mesh_terms: D016902:Air Pollution, Indoor / Q000032:analysis*; D002606:Charcoal; D011874:Radiometry / Q000379:methods*; D011886:Radon
chemical_list: D002606:Charcoal; D011886:Radon