Technologies for Radon and Radionuclides Removal

"Technologies. for. Radon. &. Radionuclide Removal. Tom Sorg. U.  S. 
Environmental Protection Agency. Radon Rn. Radium Ra. Uranium U. 
Radionuclides."

http://cfpub.epa.gov/watertrain/ppt/dwa/sorg2.ppt