[Day-Night Differences and Source Apportionment of Inorganic Components of PM During Summer-Winter in Changzhou City].

To investigate the day-night variation characteristics of inorganic components in atmospheric aerosol, PM samples were continuously collected for one month in Changzhou during summer and winter. Eleven water-soluble ions (WSⅡs) and 13 metal elements were compared in terms of their day-night character and sources. The results indicated that the day time average PM mass concentration was higher than the night time, while the percentage of the total WSⅡs in PM during the night was higher.

[Pollution Characteristics and Source Identification of PAHs in Atmospheric PM in Changzhou City].

A total of 55 ambient fine particle (PM) samples were collected in Changzhou City from January to August 2016. The concentrations of 17 PM-bound PAHs in the samples were analyzed by GC-MS. Results showed that seasonal average mass concentrations of PAHs in winter, spring, and summer were 140.