Considering the nuclear crisis unfolding in Japan right now here are two patents that teach methods of cleaning nuclear contaminated air utilizing systems that contain pressure swing adsorption. United States Patent 4,793,832, to Joost Veltman and two others from California, teaches the use of a series of compressors and coolers followed by the use of a pressure swing adsorption system to remove radioactive materials from the air. The invention was originally assigned to FMC Corporation.
United States Patent 7,125,439 issued to Edward Bennett teaches a system for removing nuclear, biological and chemical contaminants from air by using a regenerative pressure swing adsorption system. The contaminated air is cooled, compressed, dewatered and then put through the pressure swing adsorption system. The invention was assigned to Aircontrol Technologies Limited of the UK. Bennett’s application discusses advances in efficiency over older technologies such as the Veltman system.