邯郸市PM<sub>2.5</sub>中碳组分的污染特征及来源分析

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Abstract

In order to study the pollution characteristics and sources of carbon components in PM_2.5 in Handan City, samples of PM_2.5 were collected from April to December 2017 and the mass concentrations of organic carbon (OC) and elemental carbon (EC) in PM_2.5 were analyzed by thermal optical reflection (TOR). The results showed that the average annual concentrations of PM_2.5 and total carbon aerosol (TCA) were (88.87±58.89)μg/m³ and (31.45±23.35)μg/m³ respectively. The exceeding standard rate of PM_2.5 concentration was 50%, and TCA accounted for (38.23%±14.61%) of PM_2.5 during the sampling period, indicating that the pollution of carbon components was serious in Handan. The average mass concentration of TCA was (68.06±23.77)μg/m³ in winter, which contributed (46.86%±10.07%) to PM_2.5, and the concentrations of OC (37.09±13.05)μg/m³ and EC (8.72±3.78)μg/m³ in winter were higher than other seasons, indicated the carbon aerosol was polluted seriously. The OC/EC ratio was higher than 2 in each season, which indicated that Handan was polluted by secondary organic carbon (SOC) all year round. OC, EC and SOC were significantly positively correlated with SO₂ and NO₂, and negatively correlated with O₃ especially the correlation between carbon components and NO₂ was the strongest, indicating that the carbon component was most likely affected by vehicle exhaust emissions. Principal component analysis of the eight carbon components showed that road dust, coal combustion and vehicle exhaust were the main contributors to OC and EC in PM_2.5 in Handan City.

Key words： carbon components pollution characteristics meteorological factors gaseous pollutants source analysis

Received: 14 October 2019

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X513

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	XUE Fan-li
	NIU Hong-ya
	WU Zhen-xiao
	REN Xiu-long
	LI Shu-jiao
	LIU Zhao-ce
	FAN Jing-sen

Cite this article:

XUE Fan-li,NIU Hong-ya,WU Zhen-xiao等. Pollution characteristics and sources of carbon components in PM_2.5 in Handan City[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(5): 1885-1894.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I5/1885

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