太原市大气中PM_(10)的监测与分布

Measurements and Distribution of PM_(10) in Air of Taiyuan

2 0 0 1年 3月下旬 ,在太原市建成区均匀布设 15个网格点 ,使用便携式空气质量监测仪 ,连续 5天监测了各点大气中可吸入颗粒物 (PM10 )的浓度。结果表明 :监测期间PM10 的浓度范围为 0 .191～ 0 .6 6 0mg/m3 ,全市日平均浓度为 0 .373mg/m3 ,上午平均值是下午的 2倍 ;PM10 浓度空间分布整体上比较均匀 ,不同功能区的污染程度依次为 :电厂 >化工区 >太钢工业区 >桃园商业区 >太行居民区。着重探讨了污染现状的成因 。

With new portable instruments, measurements on the concentration of inhalable particulates (PM 10 ) were carried out at 15 evenly divided grids in the constructed area of Taiyuan for continuous 5 days in March of 2001. The results showed that the concentration of PM 10 in the 15 sites ranged from 0.191mg/m 3 to 0.660mg/m 3; the daily average concentration of the whole city was 0.373mg/m 3; the morning average concentration was 2 times higher than the afternoon average. In a whole, the spatial distribution of PM 10 in the city looked even. The rank of concentrations at different function areas was: Chemical industrial area>industrial area>Commercial area>Residential area. The causes of PM 10 distribution formation were analyzed and some suggestions were proposed to improve the air quality.