Abstract
Atmospheric polycyclic aromatic hydrocarbons (PAHs), nitro-PAHs and oxy-PAHs are emitted from primary sources. Some nitro-PAHs and oxy-PAHs can also arise from secondary formation in the atmosphere. To assess the relative importance of these sources, the polycyclic aromatic compound (PAC) concentrations were determined at a roadside (Roadside site) and on a rooftop (Urban Background site) in downtown Tokyo Japan. The concentrations of PAHs, 1-nitropyrene and oxy-PAHs at the Roadside site were higher than those at the Urban Background site, while 2-nitrofluoranthene levels were the same at both sites. However, the mean ratios of concentrations at the Urban Background site to the Roadside site were in the order 1,8-naphthalic anhydride>9,10- anthraquinone>PAHs or 1-nitropyrene or acenaphthenequinone or benzanthrone. This suggests that in addition to vehicle emissions, a considerable fraction of some of the oxy-PAHs studied originates from another source, which might be secondary formation by atmospheric PAH degradation, and this contribution varied among the oxy-PAHs.
| Original language | English |
|---|---|
| Pages (from-to) | 321-333 |
| Number of pages | 13 |
| Journal | Polycyclic Aromatic Compounds |
| Volume | 30 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2010 Oct |
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Keywords
- Airborne particulate matter
- Nitro-PAHs
- Oxy-PAHs
- PAH
- Roadside
ASJC Scopus subject areas
- Polymers and Plastics
- Materials Chemistry
- Organic Chemistry
Cite this
Comparison of PAHs, Nitro-PAHs and Oxy-PAHs associated with airborne particulate matter at roadside and urban background sites in downtown Tokyo, Japan. / Kojima, Yuki; Inazu, Koji; Hisamatsu, Yoshiharu; Okochi, Hiroshi; Baba, Toshihide; Nagoya, Toshio.
In: Polycyclic Aromatic Compounds, Vol. 30, No. 5, 10.2010, p. 321-333.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Comparison of PAHs, Nitro-PAHs and Oxy-PAHs associated with airborne particulate matter at roadside and urban background sites in downtown Tokyo, Japan
AU - Kojima, Yuki
AU - Inazu, Koji
AU - Hisamatsu, Yoshiharu
AU - Okochi, Hiroshi
AU - Baba, Toshihide
AU - Nagoya, Toshio
PY - 2010/10
Y1 - 2010/10
N2 - Atmospheric polycyclic aromatic hydrocarbons (PAHs), nitro-PAHs and oxy-PAHs are emitted from primary sources. Some nitro-PAHs and oxy-PAHs can also arise from secondary formation in the atmosphere. To assess the relative importance of these sources, the polycyclic aromatic compound (PAC) concentrations were determined at a roadside (Roadside site) and on a rooftop (Urban Background site) in downtown Tokyo Japan. The concentrations of PAHs, 1-nitropyrene and oxy-PAHs at the Roadside site were higher than those at the Urban Background site, while 2-nitrofluoranthene levels were the same at both sites. However, the mean ratios of concentrations at the Urban Background site to the Roadside site were in the order 1,8-naphthalic anhydride>9,10- anthraquinone>PAHs or 1-nitropyrene or acenaphthenequinone or benzanthrone. This suggests that in addition to vehicle emissions, a considerable fraction of some of the oxy-PAHs studied originates from another source, which might be secondary formation by atmospheric PAH degradation, and this contribution varied among the oxy-PAHs.
AB - Atmospheric polycyclic aromatic hydrocarbons (PAHs), nitro-PAHs and oxy-PAHs are emitted from primary sources. Some nitro-PAHs and oxy-PAHs can also arise from secondary formation in the atmosphere. To assess the relative importance of these sources, the polycyclic aromatic compound (PAC) concentrations were determined at a roadside (Roadside site) and on a rooftop (Urban Background site) in downtown Tokyo Japan. The concentrations of PAHs, 1-nitropyrene and oxy-PAHs at the Roadside site were higher than those at the Urban Background site, while 2-nitrofluoranthene levels were the same at both sites. However, the mean ratios of concentrations at the Urban Background site to the Roadside site were in the order 1,8-naphthalic anhydride>9,10- anthraquinone>PAHs or 1-nitropyrene or acenaphthenequinone or benzanthrone. This suggests that in addition to vehicle emissions, a considerable fraction of some of the oxy-PAHs studied originates from another source, which might be secondary formation by atmospheric PAH degradation, and this contribution varied among the oxy-PAHs.
KW - Airborne particulate matter
KW - Nitro-PAHs
KW - Oxy-PAHs
KW - PAH
KW - Roadside
UR - http://www.scopus.com/inward/record.url?scp=78649347724&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78649347724&partnerID=8YFLogxK
U2 - 10.1080/10406638.2010.525164
DO - 10.1080/10406638.2010.525164
M3 - Article
VL - 30
SP - 321
EP - 333
JO - Polycyclic Aromatic Compounds
JF - Polycyclic Aromatic Compounds
SN - 1040-6638
IS - 5
ER -