compound class specific AMS 14C analysis

化合物类别特定 AMS 14C 分析

• 批准号: 15310015
• 负责人: KUMATA Hidetoshi
• 金额: $ 10.11万
• 依托单位: Tokyo University of Pharmacy and Life Sciences
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15310015/
• 关键词: polycyclic aromatic hydrocarbon; radiocarbon; combustion sources; biomass burning; emission factor; PM10 aerosol; plant wax biomarker; carbon isotope discrimination; 燃焼起源推定; バイオマス; 化石燃料; 大気汚染; 浮遊粉塵; atmospheric PAHs; source apportionment; c

Compound class specific radiocarbon analysis (CCSRA) was performed for polycyclic aromatic chydrocarbons (PAHs) associated with airborne particulate matter (APM) with diameter <10μm (PM_<10>) and <1.1μm (PM_<1.1>) collected from a residential area of suburban Tokyo, Japan and seasonal and particle-size radiocarbon variations were investigated. Total PAHs concentrations (sum of 38 compounds with 3-6 aromatic rings) ranged 0.94-3.25 ng/m^3 for PM_<10> and 0.69-2.68 ng/m^3 for PM_<1.1> samples. Source diagnostic isomer pair ratios indicated mixed contributions from petroleum combustion and from biomass and coal combustion to the PAHs in APM. The Δ^<14>C-PAHs in APM ranging from -787 to -514‰ indicated dominance of fossil fuel combustion. The Δ^<14>C of 5-6 rings (HMW) PAHs were higher than the 3-4 rings (LMW) species in both PM_<10> and PM_<1.1> samples. The Δ^<14>C of HMW-PAHs indicated greater biomass-burning contributions in summer than in winter and no apparent particle-size variation. Conversely, the Δ^<14>C of LMW species showed a greater contribution from fossil sources in summer and in larger particles (PM_<10>). This finding could be tentatively attributed to the recondensation of fossil-PAHs vaporized from petroleum sources. A ^<14>C isotopic mass balance approach estimated that biomass burning contributes 17 to 45% of the PAH burden in suburban Tokyo, and that the increase in the biomass-PAH accounts for approximately 27% and 22% of winter-time elevation of LMW- and HMW-PAHs, respectively. These are far exceeding what is expected from the emission statistics for CO_2 and combusted materials in Japan and emphasizing the importance of biomass-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 effective regulation of atmospheric pollution by PAHs.

对直径<10μm（PM_ <0>）的多环芳族苯二碳纤维（APM）进行了化合物特异性放射性碳（CCSRA）和<1.1μm（PM_ <1.1>>），从和颗粒放射性碳的变化。从煤炭固定到APM中的PAH。 ）PAH高于两个PM_ <0> _ <1.1>在HMW-PAH上样品中的3-4环（LMW）物种，表明夏季的生物量燃烧量要比没有明显的人。 LMW物种的δ ^<14> C在夏季和较大的粒子中表现出更大的贡献（PM_ <10>）。 Tokyo nd HMW-PAH的PAH负担远远超出了日本的发射统计数据，并强调了燃烧生物量的重要性。基于现场源的意义通过使用CSRA有效调节USRA对有效PAH的大气污染进行评估。

项目成果

森林大気中有機エアロゾル炭素同位体比観測に基づくNEP推定の試み

基于森林大气有机气溶胶碳同位素比值观测估算NEP的尝试

• 发表时间: 2006
• 期刊: 国立環境研究所地球環境研究センターCGERリポート (印刷中)
• 作者: MORIWAKI Hiroshi;OHIRA Akio;MATSUSHIMA Yoshiaki;OKI Kimihiko;内田昌男ほか
• 通讯作者: 内田昌男ほか

Technical progress of microscale radiocarbon analysis,

微尺度放射性碳分析技术进展，

• 发表时间: 2004
• 期刊: Nuclear Instruments and Material Methods in Physical Research-B 223-224
• 作者: 杉原重夫;檀原徹;山下透;長岡信治;Uchida M. et al.
• 通讯作者: Uchida M. et al.

Compound Class Specific ^<14>C Analysis of Polycyclic Aromatic Hydrocarbons Associated with PM_<10> and PM_<1-1> Aerosols from Residential Area of Suburban Tokyo

与东京郊区住宅区 PM_<10> 和 PM_<1-1> 气溶胶相关的多环芳烃化合物类别特定 ^<14>C 分析

• 发表时间: 2006
• 期刊: Environmental Science and Technology (In press)
• 作者: Kumata;H. et al.
• 通讯作者: H. et al.

Evaluation of photosynthetic carbon isotopic discrimination using stable carbon isotopic ratio of aerosol plant wax biomarker (In Japanese)

使用气溶胶植物蜡生物标志物的稳定碳同位素比率评估光合碳同位素辨别力（日语）

• 期刊: National Institute for Environmental Studies, Center for Global Environmental Research CGER Report (in press)
• 作者: Uchida;M. et al.
• 通讯作者: M. et al.

Compound Class Specific ^<14>C Analysis of Polycyclic Aromatic Hydrocarbons Associated with PM_<10> and PM_<1.1> Aerosols from Residential Area of Suburban Tokyo

与东京郊区住宅区 PM_<10> 和 PM_<1.1> 气溶胶相关的多环芳烃化合物类别特定 ^<14>C 分析

• 发表时间: 2006
• 期刊: Environmental Science and Technology In press
• 作者: 長井雅史;鈴木尚史;平野公平;柴田徹;杉原重夫;Hidetoshi Kumata et al.
• 通讯作者: Hidetoshi Kumata et al.