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2008年奥运期间北京不同粒径大气颗粒物中元素碳和有机碳的变化特征
引用本文:李杏茹,王英锋,郭雪清,王跃思.2008年奥运期间北京不同粒径大气颗粒物中元素碳和有机碳的变化特征[J].环境科学,2011,32(2):313-318.
作者姓名:李杏茹  王英锋  郭雪清  王跃思
作者单位:1. 首都师范大学化学系分析测试中心,北京,100037
2. 首都师范大学化学系分析测试中心,北京,100037;中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验,北京,100029
基金项目:LAPC开放课题基金项目(LAPC-KF-2008-14);中国科学院知识创新工程重要方向项目(KZCX2-YW-Q02-03)
摘    要:采用安德森撞击式分级采样器采集2008-06-01~2008-09-30不同粒径的大气颗粒物样品,并用美国沙漠所DRI(desert research institute)的Model 2001A热光碳分析仪对其中的元素碳和有机碳进行了分析.结果表明,平均有56%、55%和73%的PM、OC和EC富集于粒径<2.1 μ...

关 键 词:元素碳  有机碳  粒径分布  二次有机碳  来源
收稿时间:2010/3/13 0:00:00
修稿时间:7/2/2010 12:00:00 AM

Size Distribution and Characterization of EC and OC in Aerosols During the Olympics of Beijing, China
LI Xing-ru,WANG Ying-feng,GUO Xue-qing and WANG Yue-si.Size Distribution and Characterization of EC and OC in Aerosols During the Olympics of Beijing, China[J].Chinese Journal of Environmental Science,2011,32(2):313-318.
Authors:LI Xing-ru  WANG Ying-feng  GUO Xue-qing and WANG Yue-si
Institution:Department of Chemistry, Analytical and Testing Center, Capital Normal University, Beijing 100037, China. lxrcc@126.com
Abstract:Samples of airborne PM with different size were collected by cascade impactor (Andersen) in Beijing during the Beijing Olympics. Organic carbon (OC) and elemental carbon (EC) in particles were determined by DRI Model 2001 A t carbon analyzer of USA. PM (56%), OC (55%) and EC (73%) were associated with the fine particle below 2.1 microm. OC and EC account for 25% and 5% of particle below 2.1 microm, respectively, which indicates that carbonaceous aerosols are key components for controlling fine particles pollution in Beijing. It is found that Beijing auto measures were effective in abatement of carbonaceous aerosols. The ratios of OC/EC indicated that the main origins of carbonaceous aerosols in fine particle were automobile exhaust fumes and coal combustion and in coarse particle were biomass burning and cooking. The average percentage of estimated secondary OC (OC(sec)) in the total OC (OC(tot)) in TSP was 74%. The results of correlation analysis show that the correlation coefficient between the OC and secondary water soluble ions (SO4(2-), NO3-, NH4+, NO2-) were very high in PM2.1 (R2 = 0.88), while the correlation coefficient was very faint in particles greater than 2.1 microm (R2 = 0.21).
Keywords:elemental carbon (EC)  organic carbon(OC)  size distribution  secondary organic carbon(SOC)  source
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