Abstract: A gas processing apparatus for causing physical and chemical changes in a gaseous material. The apparatus can be used for removing particulate materials from gases, selectively sorbing portions of gases, causing gases to chemically react with each other, and for removing odors and killing bacteria. By this apparatus high electrostatic and intensive sonic forces are simultaneously imparted to gaseous materials while the flow of such gases is controlled, i.e. by baffling. The sonic forces, moreover, are preferably imparted by a novel, flexible vibratable series of conductive ribbons connected to alternate current voltage source. For odor removal and germicide action negative ions and ultraviolet rays can also be employed.