Modeling prediction of particle distribution of polycyclic aromatic compounds in the winter atmosphere over Chongqing urban area
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.
万方数据
维普
