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首页> 外文期刊>Journal of the air & waste management association >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
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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

机译：使用低Z（原子序数）粒子电子探针X射线显微分析在韩国Gosan进行的亚太地区气溶胶表征实验田野运动中收集的大气气溶胶的单颗粒表征

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摘要

A quantitative energy-dispersive electron probe X-ray microanalysis (ED-EPMA), namely low-Z (atomic number) particle EPMA, was used to characterize the chemical compositions of the individual aerosol particles collected at the Gosan supersite, Jeju Island, Korea, as a part of the Asian Pacific Regional Aerosol Characterization Experiment (ACE-Asia). On 4-10 April 2001 just before a severe dust storm arrived, seven sets of aerosol samples were obtained by a seven-stage May cascade impactor with a flow rate of 20 L/min. Overall 11,200 particles on stages 1-6 with cutoff diameters of 16, 8, 4, 2, 1, and 0.5 μm, respectively, were examined and classified based on their secondary electron images and X-ray spectra. In general, sea salt particles were the most frequently encountered, followed by mineral dust, organic carbon (OC)-like, (NH_4)_2SO_4/NH_4HSO_4-con-taining, elemental carbon (EC)-like, Fe-rich, and K-rich particles. Sea salt and mineral dust particles had a higher relative abundance on stages 1-5, whereas OC-like, (NH_4)2SO_4/NH_4HSO_4-containing, Fe-rich, and K-rich particles were relatively abundant on stage 6. The analysis on relative number abundances of various particle types combined with 72-hr backward air mass trajectories indicated that a lot of reacted sea salt and reacted mineral dust (with airborne NO_x and SO_2 or their acidic products) and OC-like particles were carried by the air masses passing over the Yellow Sea (for sample "10 April") and many NH_4HSO_4/ (NH_4)_2SO_4-containing particles were carried by the air masses passing over the Sea of Japan and Korea Strait (for samples "4-9 April"). It was concluded that the atmosphere over Jeju Island was influenced by anthropogenic SO_2 and NO_x, organic compounds, and secondary aerosols when Asian dust was absent.
机译：定量能量分散电子探针X射线显微分析（ED-EPMA），即低Z（原子序数）粒子EPMA，用于表征在韩国济州岛Gosan超级站点收集的单个气溶胶粒子的化学成分，作为亚太地区气溶胶表征实验（ACE-Asia）的一部分。 2001年4月4日至10日，就在一场严重的沙尘暴到来之前，通过一个7级May级联式冲击器以20 L / min的流速获得了7组气溶胶样品。根据其二次电子图像和X射线光谱，对第1-6阶段截止直径分别为16、8、4、2、1和0.5μm的总共11,200个颗粒进行了检查和分类。通常，最常遇到的是海盐颗粒，其次是矿物粉尘，类有机碳（OC），（NH_4）_2SO_4 / NH_4HSO_4-含碳，类元素碳（EC），富铁和K富含颗粒。在第1-5阶段，海盐和矿物粉尘颗粒的相对丰度较高，而在第6阶段，类似OC的，（NH_4）2SO_4 / NH_4HSO_4，富铁和富钾的颗粒相对丰富。各种相对类型的相对数量丰度结合向后72小时的空气质量轨迹表明，空气团携带了许多反应的海盐和反应的矿物粉尘（带有空气中的NO_x和SO_2或它们的酸性产物）和OC类颗粒穿过黄海（样本“ 4月10日”）和许多含NH_4HSO_4 /（NH_4）_2SO_4的颗粒被穿越日本海和韩国海峡的气团携带（样本“ 4月4-9日”）。结论是，在没有亚洲粉尘的情况下，济州岛上的大气受到人为SO_2和NO_x，有机化合物和二次气溶胶的影响。

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  • 来源
    《Journal of the air & waste management association》 |2011年第11期|p.1183-1191|共9页
  • 作者

    Hong Geng; Fangqin Cheng; Chul-Un Ro;

  • 作者单位

    Research Center of Environmental Science and Engineering, Shanxi University, Taiyuan, People's Republic of China;

    Research Center of Environmental Science and Engineering, Shanxi University, Taiyuan, People's Republic of China;

    Department of Chemistry, Inha University, YonghyunDong, NamGu, Incheon, Korea;

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