北京2009~2010年冬、春季PM<sub>2.5</sub>污染特征

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Abstract

A comprehensive measurement was conducted to investigate thecharacteristics of particulate matter (PM) pollution in winter and spring of Beijing. 24-hour particle samples were collected from December to May, 2009~2010, and the chemical compositions of PM_2.5 were analyzed. The average PM_2.5 massconcentrations were (84.97±68.98)μg/m³ and (65.25±45.76) μg/m³ in winter and spring, respectively. Secondary inorganic aerosols, i.e. sulfate, nitrate, andammonium (SNA), and secondary organic aerosols (SOA) were dominant theparticulate matter, with the total fraction (SNA+SOA) of 49% and 47% in winter and spring, respectively. Due to the largesource emissionand unfavorable meteorological conditions such as low temperature, low wind speed, and high relative humidity; the contributions of secondary inorganic aerosols (NH₄⁺、NO₃^-、SO₄^2-) were enhanced during thepolluted days, and the nitratewas more enhanced on polluted days. The SOA was always the most importantorganic aerosolcomponentcontributedto PM_2.5 in winter and spring. The contribution ofprimary organicaerosolsalso increased due tothe stagnant meteorological condition on polluted days.

Key words： Beijing PM_2.5 winter spring chemical composition

Received: 26 January 2016

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	Articles by authors
	GU Fang-ting
	Hu Min
	WANG Yu
	LI Meng-ren
	GUO Qing-feng
	WU Zhi-jun

Cite this article:

GU Fang-ting,Hu Min,WANG Yu等. Characteristics of PM_2.5 pollutionin winter and spring of Beijing during 2009~2010[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(9): 2578-2584.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2016/V36/I9/2578

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