Quantification of ozone levels in indoor environments generated by ionization and ozonolysis air purifiers

被引:112
作者
Britigan, N [1 ]
Alshawa, A [1 ]
Nizkorodov, SA [1 ]
机构
[1] Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA
基金
美国国家科学基金会;
关键词
D O I
10.1080/10473289.2006.10464467
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Indoor air purifiers are advertised as safe household products for health-conscious individuals, especially for those suffering from allergies and asthma. However, certain air purifiers produce ozone (O-3) during operation, either intentionally or as a byproduct of air ionization. This is a serious concern, because O-3 is a criteria air pollutant regulated by health-related federal and state standards. Several types of air purifiers were tested for their ability to produce ozone in various indoor environments at 40-50% relative humidity, including office rooms, bathrooms, bedrooms, and cars. O-3 levels generated by personal wearable air purifiers were also tested. In many cases, O-3 concentrations were well in excess of public and/or industrial safety levels established by U.S. Environmental Protection Agency, California Air Resources Board, and Occupational Safety and Health Administration. Simple kinetic equations were obtained that can predict the steady-state level of O-3 in a room from the O-3 emission rate of the air purifier and the first-order decay rate of O-3 in the room. The additivity of O-3 levels generated by independent O-3 generators was experimentally demonstrated.
引用
收藏
页码:601 / 610
页数:10
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