In this research, four different levels of road (secondary main road, main road, express way, urban outer ring road) were selected to collect PM2.5 and PM10 samples along the roadside in April and May, 2015, in Tianjin. The traffic counting was done simultaneously during the sampling period. Results showed that roadside OC and EC concentrations of PM2.5 and PM10 were at medium level compared with some domestic cities, however, they were all higher than foreign cities. For PM2.5, there were significant differences among four roads in the percentages of char-EC, soot-EC, OC, EC. And the sequence of their percentages in PM2.5 was main road > express way > urban outer ring road > secondary main road, but not for PM10. Values of OC/EC ratio and char-EC/soot-EC ratio were 2.95 and 2.3. They were 3.1 and 2.2 for PM10. Correlation analysis showed that OC and EC had same sources, and EC was linearly correlated with char-EC for both PM2.5 and PM10.
张静, 吴琳, 杨志文, 方小珍, 王安旭, 毛洪钧. 典型道路路边空气颗粒物中碳组分的组成特征[J]. 中国环境科学, 2016, 36(9): 2561-2566.
ZHANG Jing, WU Lin, YANG Zhi-wen, FANG Xiao-zhen, LIU Ming-yue, WANG An-xu, MAO Hong-jun. Characterization of carbonaceous in PM2.5 and PM10 at urban roadside environment. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(9): 2561-2566.
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