Classification and chemical compositions of individual particles at an eastern marginal site of Tibetan Plateau

Developmental Biology

Ying Hu¹  Longyi Shao¹  Jianzhong Ma³  Jingsen Fan²  Jing Wang¹  Jianying Wang¹ 

[1] State Key Laboratory of Coal Resources and Safe Mining, and School of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China$$;State Key Laboratory of Coal Resources and Safe Mining, and School of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China$$Collaborative Innovation Center of the Comprehensive Development and Utilization of Coal Resource, Hebei Province and The Resources Surveying and Researching Laboratory of HeBei Province, Hebei University of Engineering, Handan 056038, China$$;Chinese Academy of Meteorological Sciences, Beijing 100081, China$$

关键词: Shangri-La;    TEM-EDX;    Mixing state;    Individual particles;    Tibetan Plateau;   

DOI  :  10.1016/j.apr.2016.04.007

学科分类：农业科学（综合）

来源: Dokuz Eylul Universitesi * Department of Environmental Engineering

【 摘 要 】

Aerosol particles at Shangri-La, an eastern marginal site of Tibetan Plateau, were collected in July and August 2011. Morphologies and elemental compositions of individual particles were investigated through transmission electron microscopy coupled with energy dispersive X-ray spectroscopy. More than 14 elements were detected in the aerosol particles, and S were detected in more than 70% of the 292 analyzed particles. Six morphological types of individual particles were identified: soot, fly ash, complex secondary particles, crustal minerals, organic particles, and metal particles. The aerosol particles mainly comprised mineral particles (36.02%) and complex secondary particles (30.73%), followed by organic particles (17.38%), soot (8.06%), fly ash (6.08%), and metal particles (1.01%). The diameters of fly ash, soot, and metal particles were less than 2 μm. Approximately 81% of the particles were internally or externally mixed with two or more aerosol components from different sources. Soot, fly ash, organic, and fine mineral particles were commonly internally mixed with S-rich particles. Mineral particles tended to commonly associate with visible coatings, probably formed through chemical reactions on the surface of the particles. Back-trajectories revealed that air mass arriving at Shangri-La were transported from Northeast Burma, a region of the Indian subcontinent.

【 授权许可】

Unknown   

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