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Characterization of Organic Aerosol Particles Observed during Asian Dust Events in Spring 2010
並列摘要
Between 20 March and 4 April, 2010, 24-hr PM2.5 measurements were carried out at an urban site in Gwangju, Korea, to examine the variations in the composition of its chemical constituents among dust storm (DS) events, haze pollution, and typical sampling (TS) conditions. A very heavy Asian DS (DS1) and a minor DS (DS2) occurred at the site on 20 and 23 March, 2010, respectively. The concentrations of organic matter, NO3 -, SO4 2-, and the predicted crustal material made a contribution to the observed PM2.5 of 12.9, 9.7, 12.9, and 36.9% for DS1, 23.8, 17.1, 9.9, and 29.7% for DS2, and 24.9, 20.2, 10.3, and 17.6% for the haze event, respectively. Over the study period, the water-soluble organic carbon (WSOC)/OC and hydrophilic WSOC (WSOCHPI)/WSOC ratios ranged from 0.35 to 0.54 and from 0.15 to 0.61, respectively, with the highest ratios occurring during DS1. The concentration of WSOCHPI during DS1 was about 2-3 times higher than that during the TS period. The strong correlation between WSOC/OC and WSOCHPI/WSOC (R2 = 0.84) clearly indicates that the increase in the WSOC/OC ratio can be attributed to the increased concentration of WSOCHPI, suggesting that the aerosol sample collected during DS1 was more aged or atmospherically processed than the samples collected during the TS. In addition to the association between the WSOC/OC and WSOCHPI/WSOC ratios, strong correlations between the oxalate and SO4 2- concentrations (R2 = 0.74), and between the WSOCHPI and SO4 2- concentrations (R2 = 0.69), suggest that the WSOCHPI observed at the site was produced by atmospheric transformation processes similar to those seen with SO4 2- and oxalate. In contrast, the hydrophobic WSOC (WSOCHPO) concentration dominated in the other sampling periods, except for DS1, and accounted for 71.1-84.7% of WSOC. Based on the results of previous studies, the higher WSOCHPO/WSOC ratio during the TS indicates that the primary combustion emissions were important sources of the WSOCHPO fraction at this site.
被引用紀錄
延伸閱讀
- 陳柏欽（2012）。Characterization of aerosol emission from the burst of a single film〔碩士論文，國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU.2012.00509
- Huang, S. H., Kuo, Y. M., Lin, C. W., Chen, P. C., & Chen, C. C. (2020). Characterization of Aerosol Emission from Single-film Rupture in a Tube. Aerosol and Air Quality Research, 20(10), 2239-2248. https://doi.org/10.4209/aaqr.2019.10.0547
- Kwon, S. H., Kim, Y. P., & Lee, J. Y. (2013). Impact of Dust Storms on the Organic Composition in the Ambient Aerosol. Aerosol and Air Quality Research, 13(1), 97-106. https://www.airitilibrary.com/Article/Detail?DocID=16808584-201302-201302200005-201302200005-97-106
- Han, T., Liu, X., Zhang, Y., Qu, Y., Gu, J., Ma, Q., Lu, K., Tian, H., Chen, J., Zeng, L., Hu, M., & Zhu, T. (2014). Characteristics of Aerosol Optical Properties and Their Chemical Apportionments during CAREBeijing 2006. Aerosol and Air Quality Research, 14(5), 1431-1442. https://doi.org/10.4209/aaqr.2013.06.0203
- Lee, K., Park, J., Kang, M., Kim, D., Batmunkh, T., Bae, M. S., & Park, K. (2017). Chemical Characteristics of Aerosols in Coastal and Urban Ambient Atmospheres. Aerosol and Air Quality Research, 17(4), 908-919+ap1-3. https://doi.org/10.4209/aaqr.2016.08.0342