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佛山市冬季大气非甲烷烃的污染特征及来源分析
CHARACTERISTICS AND SOURCES OF ATMOSPHERIC NON-METHANE HYDROCARBONS IN WINTER IN FOSHAN CITY
【摘要】 2008年12月10日—30日在佛山收集38个大气非甲烷烃(NMHCs)样品,并进行定量分析.结果表明,佛山市大气NMHCs浓度水平比较高,其中甲苯浓度最高((57.83±49.20)μg.m-3),其次为异戊烷((49.39±37.55)μg.m-3)、乙炔((31.00±17.13)μg.m-3)和丙烷((26.59±9.46)μg.m-3).日变化规律表明机动车尾气排放是大多数NMHCs的主要来源,苯/甲苯比值(0.29±0.23)也表明尾气排放是NMHCs的主要来源,同时其它来源如溶剂挥发对佛山市大气NMHCs的贡献不容忽视.后向轨迹反演显示气团的传输路径对佛山市大气NMHCs浓度有一定的影响.
【Abstract】 Atmospheric non-methane hydrocarbons(NMHCs) in Foshan city were investigated during December 10—30,2008.Toluene was the most abundant compound of NMHCs,followed by i-pentane,ethyne,propane and ethane.The data showed most hydrocarbons were at rather high concentration levels.Both diurnal variation of NMHCs and measured B/T ratios indicated that vehicle emission acted as the main source of most NMHCs,and other sources such as solvent evaporation also contributed to ambient hydrocarbons.In addition,air mass backward trajectory analysis revealed air masses from other polluted regions had influence on the concentrations of atmospheric NMHCs in Foshan city.
【Key words】 non-methane hydrocarbons; characteristics; Source; Foshan city.;
- 【文献出处】 环境化学 ,Environmental Chemistry , 编辑部邮箱 ,2011年10期
- 【分类号】X51
- 【被引频次】3
- 【下载频次】225