校园PM_(2.5)和PM_(10)的分布及形貌观察

Distribution and Morphology of PM_(2.5) and PM_(10) on Campus

塔里木大学地处沙漠边缘,空气质量受沙尘天气影响。本研究监测教学、宿舍和办公等功能空气中的PM_(2.5)、PM_(10)质量浓度数据,并对TSP中重金属(Cd、Cu、Mn、Pb、Co、Ni和Zn等)及有机污染PAEs进行分析。结果表明:校园PM_(2.5)在4月平均含量均大于300μg/m^3,表现为宿舍区>教学区>办公区;PM_(10)平均含量均大于390μg/m^3,表现为宿舍区>教学区>办公区,均超过了新标准规定的二级标准日均值(35μg/m^3和150μg/m^3)。TSP重金属含量浓度为0.62～33.05μg/g,重金属质量浓度的大小顺序为:Mn>Pb>Zn>Cu>Co>Ni>Cd。TSP颗粒较大,形状不规则,主要为沙尘矿物多形状的晶粒和球形碳颗粒。

The campus was located in the edge of the desert,there were sandstorms all year round,the air quality was affected by it.In the campus as the research object selection function such as teaching,dormitory and office area collected PM2.5 and PM10 mass concentration data,and heavy metals in the TSP(Cd,Cu,Mn,Pb,Co,Ni and Zn)and organic pollution PAEs were analyzed.The results showed that in April,the average PM2.5 content of the campus was more than 300μg/m^3,representing the office area>teaching area>dormitory area.The average PM10 content was greater than 390μg/m^3.It was shown as teaching area>office area>dormitory area.All of the above pollutants have been detected when they exceed the second-level standard limits(35μg/m^3 and 150μg/m^3)set by the new standards.The heavy metal content of TSP was between 0.62~33.05μg/g,in a concentration sequence of Mn>Pb>Zn>Cu>Co>Ni>Cd,in which Mn,Pb and Zn were seriously exceeded.