太原市大气降尘化学组分及来源的粒径分布

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Abstract This study collected dustfall samples at 8 monitoring stations in Taiyuan from November 2019 to December 2020 and analyzed their chemical compositions, size distributions, and source characteristics. The key results are shown as follows. First, the particle size of dustfall was significantly affected by the sampling area, larger at the southern stations and smaller at northern stations. The particle size was also generally larger in autumn and winter, linked to the spatial-temporal characteristics of the dustfall sources in Taiyuan. In addition, the chemical components of dustfall with different particle sizes were obviously different in various spatial-temporal conditions, especially for OC, SO₄^2- and inorganic elements such as Ca, Si, Fe, etc. According to the results from the receptor models, urban dust contributed greater to dustfall with different sizes in Taiyuan (33.7%~37.5%). Meanwhile, construction dust (21.8%~31.6%) and steel industry (5.1%~18.1%) contributed significantly to medium and large particle size dustfall. The influence of coal combustion (14.1%~22.6%) to small size dustfall could not be ignored.

Key words： atmospheric dustfall particle size characteristics receptor model source apportionment

Received: 09 November 2022

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X513

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	TIAN Xiao
	XIE Yu-qi
	XU Bo
	WEI Yu-ting
	XU Han
	ZHANG Zhong-cheng
	FENG Yin-chang
	SHI Guo-liang

Cite this article:

TIAN Xiao,XIE Yu-qi,XU Bo等. Particle size characteristics of source apportionment and chemical composition of atmospheric dustfall in Taiyuan[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(6): 2755-2762.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I6/2755

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