Atmospheric Outflow of Anthropogenic Semivolatile Organic Compounds from East Asia in Spring 2004
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- 作者：Toby Primbs ; Staci Simonich ; David Schmedding ; Glenn Wilson ; Dan Jaffe ; Akinori Takami ; Shungo Kato ; Shiro Hatakeyama ; Yoshizumi Kajii
- 刊名：Environmental Science & Technology
- 出版年：2007
- 出版时间：May 15, 2007
- 年：2007
- 卷：41
- 期：10
- 页码：3551 - 3558
- 全文大小：509K
- 年卷期：v.41,no.10(May 15, 2007)
- ISSN：1520-5851
文摘
To estimate the emissions of anthropogenic semivolatileorganic compounds (SOCs) from East Asia and to identifyunique SOC molecular markers in Asian air masses, high-volume air samples were collected on the island of Okinawa,Japan between 22 March and 2 May 2004. Contributionsfrom different source regions (China, Japan, the Koreas,Russia, and ocean/local) were estimated by use of sourceregion impact factors (SRIFs). Elevated concentrations ofhexachlorobenzene (HCB), hexachlorcyclohexanes (HCHs),dichlorodiphenyltrichloroethanes (DDTs), and particulate-phase polycyclic aromatic hydrocarbons (PAHs) wereattributed to air masses from China. A large proportion ofthe variation in the current-use pesticides, gas-phasePAHs, and polychlorinated biphenyl (PCB) concentrationswas explained by meteorology. Chlordanes showed atechnical mixture profile and similar concentrations regardlessof source region. 
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HCH and trans/cis chlordaneratios did not vary significantly with different sourceregions and had regional averages of 2.5 ± 1.0 and 1.2 ±0.3, respectively. Particulate-phase PAH concentrationswere significantly correlated (p value < 0.05) with otherincomplete combustion byproduct concentrations, includingelemental mercury (Hg0), CO, NOx*, black carbon,submicrometer aerosols, and SO2. By use of measuredPAH, CO, and black carbon concentrations and estimatedCO and black carbon emission inventories, the emissionof six carcinogenic particulate-phase PAHs was estimatedto be 1518-4179 metric tons/year for Asia and 778-1728metric tons/year for China, respectively. These results confirmthat East Asian outflow contains significant emissions ofcarcinogenic particulate-phase PAHs.
/ HCH and trans/cis chlordaneratios did not vary significantly with different sourceregions and had regional averages of 2.5 ± 1.0 and 1.2 ±0.3, respectively. Particulate-phase PAH concentrationswere significantly correlated (p value < 0.05) with otherincomplete combustion byproduct concentrations, includingelemental mercury (Hg0), CO, NOx*, black carbon,submicrometer aerosols, and SO2. By use of measuredPAH, CO, and black carbon concentrations and estimatedCO and black carbon emission inventories, the emissionof six carcinogenic particulate-phase PAHs was estimatedto be 1518-4179 metric tons/year for Asia and 778-1728metric tons/year for China, respectively. These results confirmthat East Asian outflow contains significant emissions ofcarcinogenic particulate-phase PAHs.