典型道路路边空气颗粒物中碳组分的组成特征
发布时间：2019-01-02 13:09
【摘要】：在天津市内选取了4条不同等级的道路(次干道,主干道,快速路,外环线),于2015年4~5月分别在4条道路的路边进行了PM2.5和PM10样品和车流量信息的采集,并对其中的碳组分进行了分析.结果显示,天津路边PM2.5和PM10中OC、EC的浓度与国内已研究的其它城市相比处于中等水平,与国外城市相比,国内这些城市的OC、EC的浓度水平则较高.char-EC、soot-EC、OC、EC在PM2.5中的百分含量在4条道路之间存在显著性差异,在4条路上百分含量为主干道快速路外环线次干道,而PM10不存在.PM2.5中OC/EC和char-EC/soot-EC的平均比值分别是2.95和2.3,PM10中分别为3.1和2.2.相关性分析的结果表明PM2.5和PM10中OC和EC有相同的来源,且EC与char-EC存在线性关系.
[Abstract]:Four different grades of roads (secondary main road, expressway, outer ring line) were selected in Tianjin. PM2.5 and PM10 samples and traffic flow information were collected on the roadside of four roads from April to May 2015. The carbon components were analyzed. The results show that the concentration of OC,EC in PM2.5 and PM10 in Tianjin is at the middle level compared with other cities studied in China, and the concentration of OC,EC in these cities is higher than that in foreign cities. There was significant difference in the percentage content of OC,EC in PM2.5 between the four roads, and the content of OC,EC in 4 roads was the secondary trunk of the outer loop of the main highway expressway. The average ratios of OC/EC and char-EC/soot-EC in PM2.5 were 2.95 and 2.3g / PM10, respectively, which were 3.1 and 2.2 respectively. The results of correlation analysis show that OC and EC have the same source in PM2.5 and PM10, and there is a linear relationship between EC and char-EC.
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本文编号：2398528
[Abstract]:Four different grades of roads (secondary main road, expressway, outer ring line) were selected in Tianjin. PM2.5 and PM10 samples and traffic flow information were collected on the roadside of four roads from April to May 2015. The carbon components were analyzed. The results show that the concentration of OC,EC in PM2.5 and PM10 in Tianjin is at the middle level compared with other cities studied in China, and the concentration of OC,EC in these cities is higher than that in foreign cities. There was significant difference in the percentage content of OC,EC in PM2.5 between the four roads, and the content of OC,EC in 4 roads was the secondary trunk of the outer loop of the main highway expressway. The average ratios of OC/EC and char-EC/soot-EC in PM2.5 were 2.95 and 2.3g / PM10, respectively, which were 3.1 and 2.2 respectively. The results of correlation analysis show that OC and EC have the same source in PM2.5 and PM10, and there is a linear relationship between EC and char-EC.
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本文编号：2398528
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