【摘要】：在天津市內(nèi)選取了4條不同等級的道路(次干道,主干道,快速路,外環(huán)線),于2015年4~5月分別在4條道路的路邊進行了PM2.5和PM10樣品和車流量信息的采集,并對其中的碳組分進行了分析.結(jié)果顯示,天津路邊PM2.5和PM10中OC、EC的濃度與國內(nèi)已研究的其它城市相比處于中等水平,與國外城市相比,國內(nèi)這些城市的OC、EC的濃度水平則較高.char-EC、soot-EC、OC、EC在PM2.5中的百分含量在4條道路之間存在顯著性差異,在4條路上百分含量為主干道快速路外環(huán)線次干道,而PM10不存在.PM2.5中OC/EC和char-EC/soot-EC的平均比值分別是2.95和2.3,PM10中分別為3.1和2.2.相關(guān)性分析的結(jié)果表明PM2.5和PM10中OC和EC有相同的來源,且EC與char-EC存在線性關(guān)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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本文編號：2398528