This application relates to innovative apparatus and methods for efficient use of vacuum ultraviolet light and ozone to break down biological and chemical contaminants in air that flows through such apparatus, and to generate additional ozone and ozonites that further contribute to destruction of contaminants in air in a generally enclosed contaminated volume communicating with such apparatus, as well as contaminants on surfaces and within porous materials such as clothing in a generally enclosed volume, and including contaminants on the hair or skin of an individual, or on the hide or fur of an animal. A generally enclosed contaminated volume may include an interior of a hazardous materials (HAZMAT) protective suit donned by an individual, or in an environment, that was already contaminated, or a passenger compartment of a vehicle operated or parked in a contaminated area.