Investigation of aged aerosols in size-resolved Asian dust storm particles transported from Beijing, China, to Incheon, Korea, using low-Z particle EPMA

被引:36
|
作者
Geng, H. [1 ]
Hwang, H. [2 ]
Liu, X. [3 ]
Dong, S. [4 ]
Ro, C. -U. [5 ]
机构
[1] Shanxi Univ, Inst Environm Sci, Taiyuan 030006, Peoples R China
[2] Korea Polar Res Inst, Inchon 406840, South Korea
[3] Chinese Res Inst Environm Sci, Beijing 100012, Peoples R China
[4] Natl Res Ctr Environm Anal & Measurements, Beijing 100029, Peoples R China
[5] Inha Univ, Dept Chem, Inchon 402751, South Korea
基金
中国国家自然科学基金; 新加坡国家研究基金会;
关键词
X-RAY-MICROANALYSIS; ATMOSPHERIC MINERAL DUST; LONG-RANGE TRANSPORT; QUANTITATIVE ED-EPMA; CHEMICAL-COMPOSITION; INDIVIDUAL PARTICLES; OPTICAL-PROPERTIES; IMAGING TECHNIQUES; MIXING STATE; EAST-ASIA;
D O I
10.5194/acp-14-3307-2014
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This is the first study of Asian dust storm (ADS) particles collected in Beijing, China, and Incheon, Korea, during a spring ADS event. Using a seven-stage May impactor and a quantitative electron probe X-ray microanalysis (ED-EPMA, also known as low-Z particle EPMA), we examined the composition and morphology of 4200 aerosol particles at stages 1-6 (with a size cut-off of 16, 8, 4, 2, 1, and 0.5 mu m in equivalent aerodynamic diameter, respectively) collected during an ADS event on 28-29 April 2005. The results showed that there were large differences in the chemical compositions between particles in sample S1 collected in Beijing immediately after the peak time of the ADS and in samples S2 and S3, which were collected in Incheon approximately 5 h and 24 h later, respectively. In sample S1, mineral dust particles accounted for more than 88% in relative number abundance at stages 1-5; and organic carbon (OC) and reacted NaCl-containing particles accounted for 24% and 32 %, respectively, at stage 6. On the other hand, in samples S2 and S3, in addition to approximately 60% mineral dust, many sea spray aerosol (SSA) particles reacted with airborne SO2 and NOx (accounting for 24% and 14% on average in samples S2 and S3, respectively), often mixed with mineral dust, were encountered at stages 1-5, and (C, N, O, S)-rich particles (likely a mixture of water-soluble organic carbon with (NH4)(2)SO4 and NH4NO3) were abundantly observed at stage 6 (accounting for 68% and 51% in samples S2 and S3, respectively). This suggests that an accumulation of sea-salt components on individual ADS particles larger than 1 mu m in diameter occurred and many secondary aerosols smaller than 1 mu m in diameter were formed when the ADS particles passed over the Yellow Sea. In the reacted or aged mineral dust and SSA particles, nitrate-containing and both nitrate-and sulfate-containing species vastly outnumbered the sulfate-containing species, implying that ambient NOx had a greater influence on the atmospheric particles than SO2 during this ADS episode. In addition to partially-or totally-reacted CaCO3, reacted or aged Mg-containing aluminosilicates were observed frequently in samples S2 and S3; furthermore, a student's t test showed that both their atomic concentration ratios of [Mg]/[Al] and [Mg]/[Si] were significantly elevated (P < 0.05) compared to those in samples S1 (for [Mg]/[Al], 0.34 +/- 0.09 and 0.40 +/- 0.03 in samples S2 and S3, respectively, vs. 0.24 +/- 0.01 in sample S1; for [Mg]/[Si], 0.21 +/- 0.05 and 0.22 +/- 0.01 in samples S2 and S3, respectively, vs. 0.12 +/- 0.02 in sample S1). The significant increase of [Mg]/[Al] and [Mg]/[Si] ratios in Mg-containing aluminosilicates indicates that a significant evolution or aging must have occurred on the ADS particles in the marine atmosphere during transport from China to Korea.
引用
收藏
页码:3307 / 3323
页数:17
相关论文
共 6 条
  • [1] Heterogeneous aging of Asian dust storm particles transported from China to Korea
    Choel, M.
    Park, Y.
    Hwang, H.
    Kim, H.
    Liu, X.
    Dong, S.
    Ro, C. -U.
    GEOCHIMICA ET COSMOCHIMICA ACTA, 2008, 72 (12) : A159 - A159
  • [2] Single-particle investigation of summertime and wintertime Antarctic sea spray aerosols using low-Z particle EPMA, Raman microspectrometry, and ATR-FTIR imaging techniques
    Eom, Hyo-Jin
    Gupta, Dhrubajyoti
    Cho, Hye-Rin
    Hwang, Hee Jin
    Do Hur, Soon
    Gim, Yeontae
    Ro, Chul-Un
    ATMOSPHERIC CHEMISTRY AND PHYSICS, 2016, 16 (21) : 13823 - 13836
  • [3] Single-particle characterization of four "Asian Dust" samples collected in Korea, using low-Z particle electron probe X-ray microanalysis
    Ro, CU
    Hwang, H
    Chun, Y
    Van Grieken, R
    ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2005, 39 (06) : 1409 - 1419
  • [4] Chemical speciation of individual atmospheric particles using low-Z electron probe X-ray microanalysis:: characterizing "Asian Dust" deposited with rainwater in Seoul, Korea
    Ro, CU
    Oh, KY
    Kim, H
    Chun, YS
    Osán, J
    de Hoog, J
    Van Grieken, R
    ATMOSPHERIC ENVIRONMENT, 2001, 35 (29) : 4995 - 5005
  • [5] Single-particle analysis of aerosols at Cheju Island, Korea, using low-Z electron probe X-ray microanalysis:: A direct proof of nitrate formation from sea salts
    Ro, CU
    Oh, KY
    Kim, H
    Kim, YP
    Lee, CB
    Kim, KH
    Kang, CH
    Osán, J
    De Hoog, J
    Worobiec, A
    Van Grieken, R
    ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2001, 35 (22) : 4487 - 4494
  • [6] Single-Particle Characterization of Atmospheric Aerosols Collected at Gosan, Korea, during the Asian Pacific Regional Aerosol Characterization Experiment Field Campaign Using Low-Z (Atomic Number) Particle Electron Probe X-ray Microanalysis
    Geng, Hong
    Cheng, Fangqin
    Ro, Chul-Un
    JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 2011, 61 (11) : 1183 - 1191