广州亚运期间鹤山大气颗粒物及碳组分的分析

Measurement and Analysis of Particulate Matter and Carbonaceous Aerosol in Heshan during Guangzhou Asian Games

2010年11月广州亚运会期间,在鹤山连续测量了PM10、PM2.5及PM2.5中有机碳(OC)、元素碳(EC)的质量浓度,结合气象数据综合分析了该地区上述各种污染物的污染特征。研究结果表明:鹤山大气颗粒物以PM2.5为主,PM10和PM2.5具有较好的相关性(R2=0.72),其中PM2.5污染较严重;与国内外其他城市相比,鹤山OC、EC质量浓度处于中等偏高水平;OC和EC质量浓度的相关性较差(相关系数R2=0.32),OC/EC质量浓度比值远大于2,说明鹤山大气OC、EC来源较复杂,同时存在严重的二次污染;估算的二次有机碳(SOC)占OC总质量的66.5%。各种气象因素中,风速对污染物的质量浓度影响最大,秸秆燃烧等人类活动对其也有显著影响。

Mass concentrations of PM10,PM2.5,organic carbon（OC）and elemental carbon（EC）in PM2.5were measured in Heshan,China during Guangzhou Asian Games in Nov.2010.Further analysis was done together with meteorological parameters.Results showed that PM10and PM2.5mass concentrations have good correlation,with correlation coefficient of 0.72,and PM2.5pollution is serious,which plays an important role in aerosol pollution.OC and EC mass concentrations in Heshan are higher than that in many domestic and foreign cities.Average ratio of OC to EC mass concentration during the sampling period is high,with a poor correlation 0.32 between OC and EC mass concentrations,indicating that secondary air pollution occurred in Heshan.Estimated secondary organic carbon（SOC）mass concentration occupies 66.5% of the total OC.Additionally,the meteorological conditions and straw combustion both have significant effects on the ambient aerosol mass concentrations.