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RECORD NUMBER: 14 OF 37

OLS Field Name OLS Field Data
Main Title Evaluation of Pollutant Emissions from Portable Air Cleaners.
Author Destaillats, H. ; Sleiman, M. ; Fisk, W. J.
CORP Author Lawrence Berkeley National Lab., CA. Environmental Energy Technologies Div.; California State Air Resources Board, Sacramento. Research Div.; California Environmental Protection Agency, Sacramento.
Year Published 2014
Stock Number PB2015-103705
Additional Subjects Portable air cleaners ; Photocatalytic oxidation ; Plasma generation ; Microbial air pollution ; Pollutants ; Air cleaners ; Field test ; Quality control ; Ozone measurements ; particle measurments ; Volatile organic compounds (VOC)
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NTIS  PB2015-103705 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 02/03/2016
Collation 149p
Abstract
A new generation of portable standalone air cleaners relies on photocatalytic oxidation, plasma generation and microbial thermal inactivation. These technologies can generate potentially harmful byproducts, including volatile organic compounds (VOCs), ozone, ultrafine particles (UFP) and/or reactive oxygen species. Emissions originating from six portable air cleaners were investigated using a 20-m3 room-sized environmental chamber under realistic conditions. Pollutant concentrations were determined with the air cleaners operating in clean air and in the presence of a challenge VOC mixture. Four devices removed between 8% and 29% of VOCs at rates between 600 and 1700 ?g h-1, while the other two emitted VOCs at rates of 300 – 1400 ?g h-1. Two devices showed good particle removal efficiency, reducing the UFP number concentration by 35% to 90%. Primary emissions (e.g., 85 ?g h-1 toluene) and secondary oxidation byproducts (e.g., 16 ?g h-1 formaldehyde) were observed. One device emitted very high ozone levels (up to 6 mg h-1), which also produced UFP in the presence of VOCs, reaching concentrations of 3 x 103 particles per cm3. Modeling results using chamber-derived emissions rates suggested that ozone emitted by one device can exceed regulatory levels. Formaldehyde emissions were predicted to exceed California reference exposure levels for three devices, and benzene emissions were predicted for two devices to exceed Proposition 65 risk levels.