Investigation on sampling artifacts of particle associated PAHs using ozone denuder systems

Polycyclic aromatic hydrocarbons （PAHs） are complex organic compounds which are identified as significant carcinogenic to human health. PAHs （mainly in particle phase） are susceptible to atmospheric oxidant gases, especially ozone, nitrogen oxides （NOx）, hydroxyl radical （OH）, and could be degraded...

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Bibliographic Details
Published in:Frontiers of environmental science & engineering 2014-04, Vol.8 (2), p.284-292
Main Authors: Liu, Kai, Duan, Fengkui, He, Kebin, Ma, Yongliang, Cheng, Yuan
Format: Article
Language:English
Subjects:
Activated carbon
air flow
Ambient temperature
Benzo(a)pyrene
carcinogenicity
Carcinogens
denuder
Earth and Environmental Science
Environment
filters
Fluid filters
gases
High temperature
human health
Hydroxyl radicals
Nitrogen oxides
Organic compounds
Oxidants
Oxidizing agents
Ozone
PAHs
particle associated polycyclic aromatic hydrocarbons (PAHs)
Photochemicals
Polycyclic aromatic hydrocarbons
Research Article
Samplers
Sampling
sampling artifacts
summer
伴随粒子
取样系统
多环芳烃
文物
溶蚀过程
臭氧
采样系统
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Summary:Polycyclic aromatic hydrocarbons （PAHs） are complex organic compounds which are identified as significant carcinogenic to human health. PAHs （mainly in particle phase） are susceptible to atmospheric oxidant gases, especially ozone, nitrogen oxides （NOx）, hydroxyl radical （OH）, and could be degraded on filters during sampling process, leading to an underestimation of ambient PAH concentrations. The goal of this work was to investigate particle associated PAHs sampling artifacts caused by ozone in summer of Beijing. Comparative sampling systems were operated simultaneously during the whole campaign, one with activated carbon ozone denuder, the other being set as conventional sampling system. Activated carbon denuder was testified to be highly efficient to eliminate ozone from air stream. In general, nine particle-bound PAHs observed from conventional sampler were all lower than those from ozone denuder system. The total PAHs （particle phase） concentration was averagely underestimated by 35.9% in conventional sampling procedure. Benzo[a]pyrene （BaP） had the highest percentage of mass loss. founded to have influences Ambient temperature was on PAHs sampling artifacts. High temperature can increase loss of particle associated PAHs during sampling.
ISSN:2095-2201
1673-7415
2095-221X
1673-7520
DOI:10.1007/s11783-013-0555-7