Study on environmental individual particles in Wuda-Wusitai Industrial Park, Inner Mongolia
WANG Zhe1,3, DONG Shu-ping2, LIANG Han-dong1,3, CHEN Yang1,3, ZHAN Qin1,4
1. State Key Laboratory of Coal Resources and Safety Mining, Beijing 100083, China;
2. National Research Center for Environmental Analysis and Measurements, Beijing 100029, China;
3. College of Geoscience and Surveying Engineering, China University of Mining & Technology, Beijing 100083, China;
4. School of Chemical and Environmental Engineering, China University of Mining & Technology, Beijing 100083, China
The individual particle analysis with SEM/EDX showing the morphology and chemical composition were conducted on 1600 individual particles within 16 aerosol samples collected in Wuda-Wusitai Industrial Park, Inner Mongolia, during the summer of 2015. The results suggest that the major particle types included mineral particles, combustion-originated particles, and sulfur-containing particles. Specifically, the mineral particles included common aluminosilicates and carbonates as well as weathered coal gangue and dust particles, while the combustion-originated particles contained not only the usual fly ash, soot aggregates and floccule carbon particles, but also the raw coal dust. Statistically the soot aggregates, aluminosilicates and dust particles accounted for 64% of total particles. The weathered coal gangue and raw coal dust were mainly presented as inhalable particles (2.5~10μm), while soot aggregates and dust particles were mainly ultrafine particles (<1.0μm). In all, the individual particle analysis suggested that the main sources of atmospheric particulates in the typical coal industrial park were coal combustion and traffic inside the park, as well as the upwind coal production and the natural desert influences.
Yang J, Ma S X, Gao B, et al. Single particle mass spectral signatures from vehicle exhaust particles and the source apportionment of on-line PM2.5 by single particle aerosol mass spectrometry[J]. Science of The Total Environment, 2017,593:310-318.
Liu X D, Dong S P, Li Y W, et al. Characterisation of atmospheric aerosol:single particle analysis with scanning electron microscope[J]. Environmental Chemistry, 2003,22(3):223-226.
Liang Y C, Liang H D, Zhu S Q. Mercury emission from spontaneously ignited coal gangue hill in Wuda coalfield, Inner Mongolia, China[J]. Fuel 182, 525-530.
Hong X P, Liang H D, Lv S, et al. Mercury emissions from dynamic monitoring holes of underground coal fires in the Wuda Coalfield, Inner Mongolia, China. International Journal of Coal Geology.181:78-86..
Liang Y C, Liang H D, Zhu S Q. Mercury emission from coal seam fire at Wuda, Inner Mongolia, China[J]. Atmospheric Environment, 2014,83:176-184.
Wang S B, Luo K L, Wang X, et al. Estimate of sulfur, arsenic, mercury, fluorine emissions due to spontaneous combustion of coal gangue:An important part of Chinese emission inventories[J]. Environmental Pollution, 2016,209:107-113.