Citation: | ZHOU Li, SHI Gui-yong, FU Yu, Guan Yao, CHEN Lai-guo. Preliminary Study on the Microscopic Morphology and Chemical Composition, and Its Source of PM2.5 in Guangzhou[J]. Rock and Mineral Analysis, 2016, 35(3): 302-309. DOI: 10.15898/j.cnki.11-2131/td.2016.03.014 |
PM2.5 is the primary pollutant which has influenced the urban atmospheric environment in recent years, and its genetic mechanism is complicated. The microscopic morphology and trace element concentration of PM2.5 in the Guangzhou urban area were determined by Scanning Electron Microscope and Inductively Coupled Plasma-Mass Spectrometry, respectively. The enrichment factor method was adopted to constrain the source of PM2.5. The results show that PM2.5 mainly occurs as amorphousness fine particles. A silicate combination containing Fe, Mg, Al, K and Na is the main chemical composition of PM2.5, characterized by the first fine particles from road dust and buildings. An energy spectrum diagram of single amorphous particle shows the combination characteristics of sulfate and nitrate. These particles may have been secondary fine particles formed from pollution gases of SO2 and NO