title: Air ionization as a control technology for off-gas emissions of volatile organic compounds.
abstract: High energy electron-impact ionizers have found applications mainly in industry to reduce off-gas emissions from waste gas streams at low cost and high efficiency because of their ability to oxidize many airborne organic pollutants (e.g., volatile organic compounds (VOCs)) to CO2and H2O. Applications of air ionizers in indoor air quality management are limited due to poor removal efficiency and production of noxious side products, e.g., ozone (O3). In this paper, we provide a critical evaluation of the pollutant removal performance of air ionizing system through comprehensive review of the literature. In particular, we focus on removal of VOCs and odorants. We also discuss the generation of unwanted air ionization byproducts such as O3, NOx, and VOC oxidation intermediates that limit the use of air-ionizers in indoor air quality management.
authors.affiliation: Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul, 04763 South Korea. Electronic address: kkim61@haynyang.ac.kr.
authors.forename: Ki-Hyun
authors.initials: KH
authors.lastname: Kim
authors.affiliation: Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul, 04763 South Korea.
authors.forename: Jan E
authors.initials: JE
authors.lastname: Szulejko
authors.affiliation: Department of Nano Science and Materials, Central University of Jammu, Jammu, 180011 India.
authors.forename: Pawan
authors.initials: P
authors.lastname: Kumar
authors.affiliation: Department of Environment and Energy, Sejong University, Seoul 143-747, 05006 South Korea.
authors.forename: Eilhann E
authors.initials: EE
authors.lastname: Kwon
authors.affiliation: Department of Marine Science and Technology, School of Earth and Mineral Science, The Federal University of Technology, P.M.B. 704, Akure, Nigeria.
authors.forename: Adedeji A
authors.initials: AA
authors.lastname: Adelodun
authors.affiliation: Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul, 04763 South Korea.
authors.forename: Police Anil Kumar
authors.initials: PAK
authors.lastname: Reddy
mesh_terms: D000390:Air Ionization; D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry; D000397:Air Pollution / Q000517:prevention & control*; D016902:Air Pollution, Indoor; D010126:Ozone / Q000032:analysis; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D055549:Volatile Organic Compounds; D010126:Ozone
keywords: Air pollution control; Ionization; Odors; Oxidative destruction; Radical; VOCs