【摘要】 2004年冬天对上海市文教区大气中的苯系物(BTEX-苯,甲苯,乙苯和二甲苯)浓度进行了监测。结果表明,上海市文教区冬季苯、甲苯、乙苯、对间二甲苯、邻二甲苯的平均浓度分别为13.23μg/m3,43.66μg/m3,13.50μg/m3,16.49μg/m35,.52μg/m3,高于国内外相似功能区的苯系物浓度,与国外大城市交通干道附近的浓度相近.所测苯系物中,甲苯的含量最高,达47.3%。白天苯系物浓度高于夜间。甲苯、乙苯、二甲苯相互间具有较好的相关性,但与苯的相关性不显著,说明苯的来源不同与其他苯系物。更多还原

【Abstract】 The benzene,toluene,ethylbenzene and xylene(BTEX) sampled on campus site in Shanghai ambient air was detected in winter in 2004.Results indicated that the average concentration of benzene,toluene,ethylbenzene and xylene was 13.23μg/m3,43.66μg/m3,13.50μg/m3,16.49μg/m3,5.52μg/m3 respectively,which were higher than those in the similar functional zone in China and foreign cities.The concentrations were comparable to those near the main traffic roads in most foreign metropolis.Toluene was found to be the most abundant compound,about 47.3% of the total BTEX;The BTEX concentrations were higher in daytime than those in nighttime.Toluene was correlated significantly with ethlybenzene and xylene,but lacked strong correlation with benzene which indicated that the sources of benzene were different from TEX sources.更多还原