Abstract:

The PM2.5 concentration distributions data on ancient town campus of Dali University shows that the PM2.5 concentration of
the whole campus, except the Second Students Canteen, is lower than the National Primary Standard. The PM2.5 concentration of the
Second Students Canteen is higher than the primary standard only at rush hours, but still lower than National Second Standard. It's
found that the emissions near the canteen and the poor air circulation contribute to the increase of the PM2.5 concentration in this
canteen. Concentration of PM2.5 in the multimedia classroom reach National Primary Standard, but it is about 1.5 times of the normal
classroom. This paper recommends Dali University to further improve ventilation environment of the student canteen, control the
surrounding emission sources, and improve the air flow in the multimedia classroom, in order to further improve air quality.

Key words: Dali University, campus, PM2.5, detection and analysis, air quality