深圳市典型混合功能区PM<sub>2.5</sub>源解析研究

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Abstract In order to accurately identify the source of PM_2.5 pollution in the typical commercial, residential and industrial mixed functional areas of the Shenzhen, this study selected five points in the northern part of Shenzhen to be located in the northern part of Shenzhen from September 2017 to August 2018. The sample collection and composition analysis of particles with a dynamic diameter of less than 2.5μm, using the optimized multivariate linear engine model (ME-2) to explore its main sources and their temporal and spatial characteristics. The results show that the study period of the study area The annual average concentration of PM_2.5 in the atmosphere is 29.0μg/m³, and 10 sources of SO₂ secondary conversion(19.9%), motor vehicles(15.1%), biomass combustion(11.2%), etc. are analyzed, of which SO₂ secondary conversion, biomass combustion, NO_x secondary conversion, VOCs secondary conversion, industrial emissions, aged sea salt and ocean-going ship sources have significant regional transmission characteristics, while motor vehicle sources, coal burning and dust have local source characteristics and are subject to local emissions. The impact is greater. Motor vehicle sources, NO_x secondary conversion sources, industrial emissions and biomass combustion sources have increased most significantly under heavy pollution weather. Strengthening the control of these sources is the key to the refined prevention and control of PM_2.5 pollution in such mixed functional areas.

Key words： PM_2.5 Pearl River Delta multilinear engine(ME-2) source analysis

Received: 09 February 2021

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X513

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	LAN Zi-juan
	JIANG Jia-hao
	LIN Li-liang
	HUANG Xiao-feng
	HE Ling-yan

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LAN Zi-juan,JIANG Jia-hao,LIN Li-liang等. Source analysis of PM_2.5 in the typical mixed functional zone of Shenzhen[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(9): 4001-4008.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I9/4001

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