深圳市冬季PM<sub>2.5</sub>中水溶性有机物的来源特征

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Abstract

In this study, a combined system of particle-into-liquid sampler (PILS)-Nebulizer-aerosol chemical speciation monitor (ACSM) was applied in the on-line measurement of water-soluble components in PM_2.5 in winter in Shenzhen. High temporal resolution concentrations of WSOM, sulfate, nitrate, ammonium and chloride and their mass spectra were simultaneously obtained. The mass concentration of the water-soluble species in PM_2.5 ranged from 4.0~117μg/m³, with an average of 20.1μg/m³, and sulfate and WSOM were the most abundant components. The characteristics of the mass spectrum of WSOM was similar to that of oxygenated organic aerosols, and the average O/C was 0.60±0.09. We found that WSOM strongly correlated with secondary inorganic ions (SO₄^2-+NO₃^-) and potassium (K), while the correlation with black carbon (BC) weakened. All evidence showed that the contribution of secondary organic aerosol (SOA) and biomass burning to WSOM was much greater than local primary emission in winter of Shenzhen.

Key words： water-soluble components (WSOM) particle-into-liquid sampler (PILS) aerosol chemical speciation monitor (ACSM) on-line measurement SOA

Received: 22 April 2018

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	Articles by authors
	GAO Mao-shang
	LI Hui-ying
	LI Yan-ting
	WEI Jing
	SUN Yi-fei
	HE Ling-yan
	HUANG Xiao-feng

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GAO Mao-shang,LI Hui-ying,LI Yan-ting等. Source characteristics of water-soluble organic matters in PM_2.5 in the winter of Shenzhen[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(11): 4017-4022.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I11/4017

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