caa a22 4500 606199721 CHVBK 20210128100939.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s10653-014-9636-1 doi (NATIONALLICENCE)springer-10.1007/s10653-014-9636-1 Seasonal variation and source apportionment of organic tracers in PM10 in Chengdu, China [Elektronische Daten] [H. Yin, C. Qiu, Z. Ye, S. Li, J. Liang] Organic compound tracers including n-alkanes, triterpane, sterane, polycyclic aromatic hydrocarbons (PAHs) and dicarboxylic acids of airborne particulate matter (PM10) were characterized for samples collected at five sites from July 2010 to March 2011 using GC/MS. Spatial and temporal variations of these organic tracers in PM10 were studied, and their sources were then identified respectively. Average daily concentrations of PM10 varied in different seasons with the trend of PM10 in winter (0.133mg/m3)>autumn (0.120mg/m3)>spring (0.103mg/m3)>summer (0.098mg/m3). Daily concentrations of n-alkanes (C11-C36) ranged from 12.11 to 163.58ng/m3 with a mean of 61.99ng/m3. The C max and CPI index of n-alkanes indicated that vehicle emissions were the major source in winter, while the contributions of high plant wax emissions became significant in other seasons. It was discovered that the main sources of triterpenoid and steranes were gasoline and diesel engine emissions. Concentrations of ∑15PAHs in PM10 also varied (12.25-58.56ng/m3) in different seasons, and chrysene, benzo(a)pyrene, benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(ghi) perylene and fluoranthene were the dominant components. In the four seasons, the concentration of ∑15PAHs was relatively higher at the northern site because of traffic congestion. The main source of airborne PAHs was traffic emissions and coal combustion. Average daily concentrations of dicarboxylic acids (C4-C10) in PM10 ranged from 12.11 to 163.58ng/m3, of which azeleic acid was the major compound (0.49-52.04ng/m3, average 14.93ng/m3), followed by succinic acid (0.56-19.08ng/m3, average 6.84ng/m3). The ratio of C6/C9 showed that the major source in winter was biological, while the contributions of emissions from anthropogenic activities were much higher in summer. Springer Science+Business Media Dordrecht, 2014 PM10 nationallicence Alkanes nationallicence PAHs nationallicence Dicarboxylic acid nationallicence Source nationallicence Yin H. Chengdu University of Information Technology, 610225, Chengdu, Sichuan Province, China aut Qiu C. Chengdu University of Information Technology, 610225, Chengdu, Sichuan Province, China aut Ye Z. Chengdu University of Information Technology, 610225, Chengdu, Sichuan Province, China aut Li S. Chengdu University of Information Technology, 610225, Chengdu, Sichuan Province, China aut Liang J. Chengdu University of Information Technology, 610225, Chengdu, Sichuan Province, China aut Environmental Geochemistry and Health Springer Netherlands 37/1(2015-02-01), 195-205 0269-4042 37:1<195 2015 37 10653 https://doi.org/10.1007/s10653-014-9636-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 brief-communication jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10653-014-9636-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yin H. Chengdu University of Information Technology, 610225, Chengdu, Sichuan Province, China aut NATIONALLICENCE 700 1- Qiu C. Chengdu University of Information Technology, 610225, Chengdu, Sichuan Province, China aut NATIONALLICENCE 700 1- Ye Z. Chengdu University of Information Technology, 610225, Chengdu, Sichuan Province, China aut NATIONALLICENCE 700 1- Li S. Chengdu University of Information Technology, 610225, Chengdu, Sichuan Province, China aut NATIONALLICENCE 700 1- Liang J. Chengdu University of Information Technology, 610225, Chengdu, Sichuan Province, China aut NATIONALLICENCE 773 0- Environmental Geochemistry and Health Springer Netherlands 37/1(2015-02-01), 195-205 0269-4042 37:1<195 2015 37 10653