Characteristics of Carbonaceous Aerosol Pollution in PM2.5 in Xi'an

被引：6

作者：

Mu Z. ^{[1
]}

Chen Q.-C. ^{[1
]}

Wang Y.-Q. ^{[1
]}

Shen Z.-X. ^{[2
]}

Hua X.-Y. ^{[1
]}

Zhang Z.-M. ^{[1
]}

Sun H.-Y. ^{[1
]}

Wang M.-M. ^{[1
]}

Zhang L.-X. ^{[1
]}

机构：

[1] College of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an

[2] Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an

来源：

Huanjing Kexue/Environmental Science | 2019年 / 40卷 / 04期

关键词：

Element carbon; Organic carbon; PM[!sub]2.5[!/sub; Seasonal change; Source analysis;

D O I：

10.13227/j.hjkx.201807135

中图分类号：

学科分类号：

摘要：

Mass concentration, seasonal variation and sources of organic carbon (OC), element carbon (EC), methanol-soluble organic carbon (MSOC), and seven carbon components (OC1-4, EC1-3) were detected by thermal-optical analysis of 353 PM2.5 samples in Xi'an in 2017. The results show that the average mass concentrations of OC, EC, and MSOC were (17.56±11.83), (4.08±2.95) and (11.10±6.77) μg•m-3, respectively. The seasonal trend of the OC concentration follows the order winter>spring>summer>autumn. The seasonal trend in EC concentration follows the order winter>spring≈autumn>summer. The average MSOC/OC value is 0.64±0.20. The highest value is observed in winter and the lowest in summer. The correlation between OC and EC is good in spring (r2=0.76), but the correlation is poor in winter (r2=0.43). These results indicate that the source of the carbon aerosols was different. The content of secondary organic aerosols was estimated by the EC tracing method. The average mass concentration of SOC accounted for 51.9%, 38.4%, 37.3% and 44.0% of OC in spring, summer, autumn, and winter, respectively. The main sources of carbonaceous aerosols were analyzed by principal component analysis. The results show that carbonaceous aerosols originate mainly from coal and vehicle emissions in Xi'an. © 2019, Editorial Office of FINE CHEMICALS. All right reserved.

引用

页码：1529 / 1536

页数：7

共 48 条

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