上海宝山区细颗粒气溶胶PM_(2.5)特征

Characters of Submicron Particles PM_(2.5) in Baoshan District,Shanghai

为了探讨上海宝山区细颗粒气溶胶PM2.5特征,于2008.9.1-2009.8.31连续采集了细颗粒气溶胶PM2.5样品。分别分析了空气中PM2.5的质量浓度水平以及空气中以PM2.5存在的金属元素质量浓度水平,结果显示：PM2.5的年均质量浓度达33.70μg/m3;冬季细颗粒气溶胶质量浓度水平最高达44.35μg/m3,超标情况最为严重,超标率达37.5%;同时,检测出的11种金属元素在四季空气中的总浓度分别为：0.320μg/m3、0.384μg/m3、0.326μg/m3、0.218μg/m3。

The variation characters of PM2.5 in Baoshan district,Shanghai,where the PM2.5 samples were collected continuously from 1 Sep.2008 to 31 Aug.2009 were investigated.The mass concentration of PM2.5 and the metal concentration in the form of PM2.5 in the air were analyzed.The result showed that the average mass concentration of PM2.5 was 33.70 μg/m3,but the maximum concentration even reached to 44.35 μg/m3 in the winter,which exceeded the standards in a large margin and the excessive rate was 37.5%.Meanwhile,the metal concentrations of the 11 metal elements in the air were 0.320 μg/m3,0.384 μg/m3,0.32 μg/m3,0.218 μg/m3,respectively,in the different 4 seasons.