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| 兰州市和太原市环境空气中NMHCs的碳同位素组成特征 | |
| 引用本文： | 彭林,任照芳,张会敏,徐永昌,牟玲,施瑞良.兰州市和太原市环境空气中NMHCs的碳同位素组成特征[J].太原理工大学学报,2010,41(1). |
| 作者姓名： | 彭林 任照芳 张会敏 徐永昌 牟玲 施瑞良 |
| 作者单位： | 1. 太原理工大学环境工程学院,太原,030024 2. 太原理工大学矿业工程学院,太原,030024 3. 中国科学院,兰州地质研究所,兰州,730000 |
| 摘 要： | 研究了兰州市和太原市环境空气中非甲烷烃(NMHCs)的污染状况及来源。利用Tenax-TA吸附管采样,热解析-色谱-同位素质谱联用仪(TD-GC-IRMS)测定了两个城市夏季不同功能区环境空气中NMHCs的稳定碳同位素组成。得出,兰州市和太原市居民区苯的δ(13C)分别为-26.4‰和-25.0‰;正烷烃的δ(13C)分别为-33.9‰~-26.1‰,-32.8‰~-27.4‰;两市交通枢纽区环境空气中检测出的C4—C7之间的NMHCs化合物相同,δ(13C)相差不大,兰州市为-30.8‰~-25.6‰,太原市为-31.0‰~-26.4‰。结果表明,两市交通枢纽区苯主要来源于汽车尾气和油类挥发,工业区石化行业类主要排放的NMHCs污染物为苯和烷烃类化合物,电厂等大型企业主要排放异丁烯、顺-2-戊烯等。控制汽车尾气、油类挥发、工业排放是降低环境空气中NMHCs污染的关键。 |
| 关 键 词： | 兰州市 太原市 环境空气 稳定碳同位素 |
Carbon Isotopic Composition Characteristic of Nonmethane Hydrocarbons in Atmosphere of Lanzhou and Taiyuan City |
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| PENG Lin,REN Zhao-fang,ZHANG Hui-min,XU Yong-chang,MOU Ling,SHI Rui-liang.Carbon Isotopic Composition Characteristic of Nonmethane Hydrocarbons in Atmosphere of Lanzhou and Taiyuan City[J].Journal of Taiyuan University of Technology,2010,41(1). | |
| Authors: | PENG Lin REN Zhao-fang ZHANG Hui-min XU Yong-chang MOU Ling SHI Rui-liang |
| Institution: | PENG Lin 1a,REN Zhao-fang 1b,ZHANG Hui-min 1a,XU Yong-chang2,MOU Ling 1b,SHI Rui-liang 1b (1a.College of Environmental Science , Engineering,TUT,Taiyuan 030024,China,1b.College of Mining Technology,Taiyuan University of Technology,2.Lanzhou Institute of Geology,Chinese Academy of Sciences,Lanzhou 730000,China) |
| Abstract: | Sampled by Tenax-TA adsorption tube, the stable carbon isotopic composition of non-methane hydrocarbons (NMHCs) in summer atmosphere in different functional districts in Lanzhou and Taiyuan city was determined by Thermal Desorption-Gas Chromatography-Isotope Ratio Mass Chromatography. The results indicate that the δ~(13)C values of benzene and n-alkanes are -26.4‰, -33.9‰～-26.1‰ and -25.0‰, -32.8‰～-27.4‰ respectively in residential area in Lanzhou and Taiyuan city respectively; the sorts of NMHCs compounds determined in transport hubs in the two cities are the same and the δ~(13)C values are -30.8‰~-25.6‰ and -31.0‰~-26.4‰, respectively. The results furthermore indicate that benzene are mainly from vehicle exhaust and fuel volatile in transport hub in the two cities; the main components of NMHCs are benzene and alkanes in petrochemical industry in industrial estate, while large enterprise such as power plants mainly emits isobutene and cis-2-petene etc. Controlling vehicle exhaust, fuel volatile and industry emissions is the key to reduce atmospheric NMHCs pollution. |
| Keywords: | NMHCs atmosphere non-methane hydrocarbons carbon isotopic composition Lanzhou city Taiyuan city |
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