| 不同粒径大气颗粒物中有机碳(OC)和元素碳(EC)的分布 |
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| 引用本文： | 唐小玲,毕新慧,陈颖军,盛国英,傅家谟.不同粒径大气颗粒物中有机碳(OC)和元素碳(EC)的分布[J].环境科学研究,2006,19(1):104-108. |
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| 作者姓名： | 唐小玲 毕新慧 陈颖军 盛国英 傅家谟 |
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| 作者单位： | 中国科学院,广州地球化学研究所,有机地球化学国家重点实验室,广东省环境资源利用与保护重点实验室,广东,广州,510640 |
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| 基金项目： | 中国科学院知识创新工程项目
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中国科学院资助项目 |
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| 摘 要： | 使用Andersen六段分级大流量采样器(粒径:7.2～10,3.0～7.2,1.5～3.0,0.95～1.5,0.49～0.95,＜0.49μm)采集了广州市荔湾区冬季的大气颗粒物样品,并用美国Sunset碳分析仪分析了其中的有机碳(OC)和元素碳(EC)组分.研究表明:OC和EC主要存在于细粒子中,与OC相比,EC则相对更集中于＜0.49 μm粒径上;PM10中二次有机碳占总有机碳(ρ(OCsec)/ρ(OC.))比例的平均值为卵%,OC,EC的对数模型图都为双峰型.对ρ(OCtot),ρ(OCpri)(一次有机碳质量浓度)与ρ(EC)进行相关性分析,结果表明,只用ρ(OC)/ρ(EC)值来评价二次污染是不充分的.
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| 关 键 词： | OC EC 二次污染 粒径 |
| 文章编号： | 1001-6929（2006）01-0104-05 |
| 收稿时间： | 2005-01-27 |
| 修稿时间： | 2005-01-27 |
Study on the Size Distribution of Organic Carbon (OC) and Elemental Carbon (EC) in the Aerosol |
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| TANG Xiao-ling,BI Xin-hui,CHEN Ying-jun,SHENG Guo-ying and FU Jia-mo.Study on the Size Distribution of Organic Carbon (OC) and Elemental Carbon (EC) in the Aerosol[J].Research of Environmental Sciences,2006,19(1):104-108. |
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| Authors: | TANG Xiao-ling BI Xin-hui CHEN Ying-jun SHENG Guo-ying and FU Jia-mo |
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| Institution: | State Key Laboratory of Organic Geochemistry,Guangdong Key Laboratory of Environment and Resources,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China |
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| Abstract: | In the winter time aerosol samples have been collected by Andersen HiVol pumping system equipped with a six-stage cascade impactor(size range: 7.2～10,3.0～7.2,1.5～3.0,0.95～1.5,0.49～0.95,<0.49 μm) in Liwan District,Guangzhou.Organic carbon(OC) and elemental carbon(EC) in particles were determined by Sunset carbon analyzer of USA.OC and EC were associated with the fine particle.Compared with OC,EC was preferably enriched in <0.49 μm particle.The average percentage of estimated secondary OC(OCsec) in the total OC (OCtot) in PM10 was 47%,and the log-normal size distribution of OC and EC was bi-modal.The correlation between ρ(OCtot),ρ(OCpri)(directly emitted OC) and ρ(EC) indicated that the ratios of ρ(OC)/ρ(EC) could not be used as a plausible index for the evidence of secondary pollution |
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| Keywords: | OC EC secondary pollution size distribution |
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