重庆大气中多环芳香类物质气粒分配模型预测

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Abstract The gas-particle partitioning of semi-volatile organic compounds (SVOCs) is an extremely important factor affecting their migration and transformation. Two families of typical SVOCs, polycyclic aromatic hydrocarbons (PAHs) and oxygenated PAHs (OPAHs), were targeted to characterize their gas-particle partitioning in the winter atmosphere over typical urban area of Chongqing. Compared to homocyclic PAHs, OPAHs were more likely to be associated with particles. The Temperature empirical model could well predict gas-particle partitioning coefficients for PAHs rather than for PAHs. Referring to the development of the Temperature empirical model for PAHs, two empirical models based on temperature and relative humidity (RH) were developed for OPAHs using the same monitoring data, and the simulation results suggest that the empirical model based on RH can better predict the gas-particle partitioning of OPAHs. Obviously, the impact of RH on the gas-particle partitioning of atmospheric OPAHs can not be ignored.

Key words： oxygenated polycyclic aromatic hydrocarbons gas-particle partitioning prediction models relative humidity

Received: 19 June 2023

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X511

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	Articles by authors
	WANG Zi-qian
	HAO Wei-wei
	DONG Ling-chi
	CHEN Jing
	ZHAO Xin-quan
	TIAN Mi

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WANG Zi-qian,HAO Wei-wei,DONG Ling-chi等. Modeling prediction of particle distribution of polycyclic aromatic compounds in the winter atmosphere over Chongqing urban area[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(2): 629-637.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I2/629

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