Compound Class Specific 14C Analysis of Polycyclic Aromatic Hydrocarbons Associated with PM10 and PM1.1 Aerosols from Residential Areas of Suburban Tokyo
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- 作者：Hidetoshi Kumata ; Masao Uchida ; Eisuke Sakuma ; Tatsuya Uchida ; Kitao Fujiwara ; Mikio Tsuzuki ; Minoru Yoneda ; and Yasuyuki Shibata
- 刊名：Environmental Science & Technology
- 出版年：2006
- 出版时间：June 1, 2006
- 年：2006
- 卷：40
- 期：11
- 页码：3474 - 3480
- 全文大小：350K
- 年卷期：v.40,no.11(June 1, 2006)
- ISSN：1520-5851
文摘
Compound class specific radiocarbon analysis (CCSRA)was performed for polycyclic aromatic hydrocarbons(PAHs) associated with airborne particulate matter (APM)with diameter <10 
m (PM10) and <1.1 m (PM1.1)collected from a residential area of suburban Tokyo,Japan, and seasonal and particle-size radiocarbon variationswere investigated. Source diagnostic isomer pair ratiosindicated mixed contributions from petroleum combustionand from biomass and coal combustion to the PAHs inAPM. The 
14C-PAHs in APM, ranging from -787 to -514”,indicated dominance of fossil fuel combustion. The 14Cof 5-6 rings (HMW) PAHs were higher than the 3-4 rings(LMW) species in both PM10 and PM1.1 samples. The14C of HMW-PAHs indicated greater biomass-burningcontributions in summer than in winter and no apparentparticle-size variation. Conversely, the 14C of LMW speciesshowed a greater contribution from fossil sources insummer and in larger particles (PM10). This finding couldbe tentatively attributed to the recondensation of fossil-PAHsvaporized from petroleum sources. A 14C isotopic massbalance approach estimated that biomass burning contributes17-45% of the PAH burden in suburban Tokyo, and thatthe increase in the biomass-PAH accounts for approximately27% and 22% of winter-time elevation of LMW- and HMW-PAHs, respectively. These are far exceeding what isexpected from the emission statistics for CO2 and combustedmaterials in Japan and emphasizing the importance ofbiomass-burning as a source of PAHs; which, in turn,demonstrates the utility and the significance of field-based source assessment by using CCSRA for an effectiveregulation of atmospheric pollution by PAHs.
m (PM10) and <1.1 m (PM1.1)collected from a residential area of suburban Tokyo,Japan, and seasonal and particle-size radiocarbon variationswere investigated. Source diagnostic isomer pair ratiosindicated mixed contributions from petroleum combustionand from biomass and coal combustion to the PAHs inAPM. The 14C-PAHs in APM, ranging from -787 to -514”,indicated dominance of fossil fuel combustion. The 14Cof 5-6 rings (HMW) PAHs were higher than the 3-4 rings(LMW) species in both PM10 and PM1.1 samples. The14C of HMW-PAHs indicated greater biomass-burningcontributions in summer than in winter and no apparentparticle-size variation. Conversely, the 14C of LMW speciesshowed a greater contribution from fossil sources insummer and in larger particles (PM10). This finding couldbe tentatively attributed to the recondensation of fossil-PAHsvaporized from petroleum sources. A 14C isotopic massbalance approach estimated that biomass burning contributes17-45% of the PAH burden in suburban Tokyo, and thatthe increase in the biomass-PAH accounts for approximately27% and 22% of winter-time elevation of LMW- and HMW-PAHs, respectively. These are far exceeding what isexpected from the emission statistics for CO2 and combustedmaterials in Japan and emphasizing the importance ofbiomass-burning as a source of PAHs; which, in turn,demonstrates the utility and the significance of field-based source assessment by using CCSRA for an effectiveregulation of atmospheric pollution by PAHs.