咸宁市大气臭氧敏感性和污染来源解析

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Abstract This research introduced statistical analysis methods and surface ozone data in 2018 to gain the knowledge about the ozone pollution characteristics in Xianning, Hubei Province. The ozone concentrations exceeded the national standards at days from March to October, especially in June, August, September and October when persistent heavy ozone pollution occurred. From April to July, the daily ozone high concentrations occurred between 12:00 and 20:00, and usually achieved the daily peak around 16:00. The Observation-Based Model (OBM) is designed and tools such as Empirical Kinetic Modeling Approach (EKMA) and Relative Incremental Reactivity (RIR) were included to calculate the ozone chemical sensitivity. It was found that the ozone formation in Xianning was VOCs-limited and seemed to be more sensible to two important anthropogenic VOCs species-xylene (XYL) and alkene (OLEP). After 10% cut of the emissions of xylene and alkene VOC species, the RIR values produced 0.271 and 0.238, respectively. Offline VOCs monitoring data was used in the PMF method and 5types of sources are appointed. It is found that industrial emissions contributed most to ozone pollution. xylene and alkene mainly came from solvent usage and combustion sources, respectively, which were the main VOC pollutants that should be controlled. During the ozone exceeding days, there were 9.8%, 1.8% and 1.9% more contributions from vegetation, solvent and biomass burning, while 2.4% and 10.9% less contributions from vehicles and industrial sections.

Key words： ozone ozone precursor ozone sensitivity VOCs OBM PMF

Received: 26 January 2021

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X511

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	Articles by authors
	REN Jun-yu
	ZHU Kuan-guang
	XIE Min
	LIU Wei
	GAO Da
	CHEN Jia-sheng
	JIN Yu-ning
	ZHAO Run-qi
	ZHANG Lin-tao

Cite this article:

REN Jun-yu,ZHU Kuan-guang,XIE Min等. Analysis of the ozone sensitivity and source appointment in Xianning, Hubei Province[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(9): 4060-4068.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I9/4060

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