大理大学古城校区PM_(2.5)浓度检测与分析

Detection and Analysis of PM_(2.5) Concentration on Ancient Town Campus of Dali University

通过对大理大学古城校区PM_(2.5)浓度进行检测,获得了校区室内室外的PM_(2.5)浓度分布数据。结果显示,除了学生食堂,整个校区的PM_(2.5)浓度都低于国家一级标准,学生食堂的PM_(2.5)浓度也只是在就餐高峰期超过国家一级标准,但低于国家二级标准。通过分析发现,导致学生食堂PM_(2.5)浓度增高的主要因素是食堂周围餐饮店的排放物和食堂的空气流动不够理想。多媒体教室内的PM_(2.5)浓度虽然都达到国家一级标准,但却是普通教室的1.5倍左右。建议学校进一步改善学生食堂的通风环境,合理控制周围的排放源,增加多媒体教室内空气的流动性,以进一步提高空气质量。

The PM_（2.5） concentration distributions data on ancient town campus of Dali University shows that the PM_（2.5） concentration of the whole campus, except the Second Students Canteen, is lower than the National Primary Standard. The PM_（2.5） 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 PM_（2.5） concentration in this canteen. Concentration of PM_（2.5） 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.