What is the state-of-the-art of portable gas-phase air-cleaning technologies on nonindustrial premises? The paper addresses gas adsorption filtration, including adsorbent media, photocatalytic oxidation, air ion generators, ozone generators, and plants.
Portable gas-phase air cleaners use different technologies to remove gaseous pollutants, which include inorganic gases (e.g. carbon monoxide and nitrogen dioxide), ozone (O₃), and organic gases (e.g. volatile organic compounds (VOCs) and aldehydes). Hundreds of different gaseous pollutants have been detected in indoor air and portable air-cleaning devices are not effective at reducing radon levels in a building and are not recommended as a radon (also found in indoor air) mitigation measure (EPA, 2009).