| 2014年北京APEC期间大气醛酮污染物的污染特征与来源分析 |
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| 引用本文： | 何晓朗,谭吉华,郭送军,马永亮,贺克斌.2014年北京APEC期间大气醛酮污染物的污染特征与来源分析[J].环境科学,2016,37(3):801-806. |
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| 作者姓名： | 何晓朗 谭吉华 郭送军 马永亮 贺克斌 |
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| 作者单位： | 广西大学环境学院, 南宁 530004;中国科学院大学资源与环境学院, 北京 100049;广西大学环境学院, 南宁 530004;清华大学环境学院, 环境模拟与污染控制国家重点联合实验室, 北京 100084;清华大学环境学院, 环境模拟与污染控制国家重点联合实验室, 北京 100084 |
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| 基金项目： | 国家自然科学基金项目(41475116,41373109,41163008);大气复合污染来源与控制重点实验室基金项目(SCAPC201401);广西自然科学基金项目(2014GXNSFAA118301,2013GXNSFAA019286) |
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| 摘 要： | 于2014年11月北京APEC会议前后,调查了大气醛酮污染物的变化规律及污染特征. 结果表明甲醛、乙醛和丙酮是主要污染物,占总醛酮污染物的82.66%,特别是甲醛,约占40.12%. APEC会议期间北京采取相关措施后,总醛酮污染物浓度下降了64.10%,醛酮污染物在会议前后的变化趋势与PM2.5等污染物相似. 会议期间和会议后甲醛、乙醛、丙酮和总醛酮污染物之间(R2为0.67~0.98)的相关性较好,说明其有相同来源; 但会议前的相关性较弱,(R2-0.11~0.42和R2 0.16~0.94),说明其来源不同. 计算所得的诊断参数如C1/C2、C2/C3和OC/EC比值显示,会议前来自汽车尾气与燃煤的复合源,而会议期间和会议后燃煤排放比例增加,特别是在会议后.
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| 关 键 词： | 北京APEC 醛酮污染物 变化规律 污染特征 尾气与燃煤 |
| 收稿时间： | 2015/9/21 0:00:00 |
| 修稿时间： | 2015/11/7 0:00:00 |
Chemical Characteristics and Sources of Atmospheric Carbonyls During the 2014 Beijing APEC |
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| HE Xiao-lang,TAN Ji-hu,GUO Song-jun,MA Yong-liang and HE Ke-bin.Chemical Characteristics and Sources of Atmospheric Carbonyls During the 2014 Beijing APEC[J].Chinese Journal of Environmental Science,2016,37(3):801-806. |
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| Authors: | HE Xiao-lang TAN Ji-hu GUO Song-jun MA Yong-liang and HE Ke-bin |
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| Institution: | School of the Environment, Guangxi University, Nanning 530004, China;College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China;School of the Environment, Guangxi University, Nanning 530004, China;State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China;State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China |
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| Abstract: | Pollution characteristic and variation trend of atmospheric carbonyls were investigated in November during the 2014 Beijing APEC. Formaldehyde, acetaldehyde and acetone were the dominant carbonyls, accounting for 82.66% of total carbonyls, and especially, formaldehyde accounted for 40.12% of total carbonyls. Atmospheric concentrations of total carbonyls decreased by around 64.10% after the clean air policy was carried out during the Beijing APEC, and the variation trend of carbonyls showed a similar pattern to those of other pollutants like PM2.5 during the APEC. Strong correlations (R2 of 0.67-0.98) were observed among formaldehyde, acetaldehyde, acetone and total carbonyls during and after the APEC, indicating that they had similar sources; however, poor correlations (R2 of -0.11-0.42 and 0.16-0.94, respectively) were observed before the APEC, implying different emission sources for ambient carbonyls. The calculated ratios of C1/C2, C2/C3 and OC/EC indicated that both vehicles and coal emissions were responsible for atmospheric carbonyls before the APEC, and emissions from coal burning were the major contributor to atmospheric carbonyls during and after the APEC, especially after the APEC. |
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| Keywords: | the Beijing APEC carbonyl pollutants variation trend pollution characteristic exhaust and coal burning |
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