2016~2018年采暖季太行山沿线城市PM<sub>2.5</sub>污染特征分析

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Abstract The OC, EC and water-soluble ions in PM_2.5 in the urban atmosphere along the transmission channel of the Taihang Mountains in the heating season of 2016 and 2017 was analyzed. Pollution characteristics were explored by using the characteristic components ratio and element enrichment factor. The results showed that the air quality in the 2017 heating season was better than that in the same period of 2016. PM_2.5 concentration decreased from 171.86μg/m³ to 123.90μg/m³. Compared with the same period of 2016, the PM_2.5 concentration in the central city of Taihang Mountain decreased significantly during the heating season in 2017. The character of SNA ions concentratiosn and ratio in the two-year heating season was "low in north and high in south", and the SNA/EC ratios were the same trend, which indicating that the secondary inorganic formation in the south cities was sever than it in north. Oppositely, the concentrations of OC and EC and ratio were "high in the north and low in the south". The Cl^-/K⁺ ratio and the enrichment factors of Zn and Ba were higher in the north, indicating that the northern cities might be affected heavily by primary emissions such as coal combustion and vehicles. The concentration of SO₂, NO₂ and CO in the heating season of each city declined in 2017, further indicating that the primary emissions in the northern cities were more serious.

Key words： Taihang Mountains PM_2.5 carbon components water-soluble ions characteristic components ratio

Received: 09 April 2019

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X513

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	WANG Jie
	ZHANG Yi-qin
	GAO Jian
	XU Zhong-jun
	MA Tong
	LIU Su
	YAN Lu-lu
	LIU Jia-yuan

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WANG Jie,ZHANG Yi-qin,GAO Jian等. Characteristics of PM_2.5 in cities along the Taihang Mountains during the heating season of 2016~2018[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(11): 4521-4529.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I11/4521

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