北京市冬季PM_(2.5)中碳组分的测量与分析  

Measurement and Discussion of Carbonaceous PM_(2.5) during Winter in Beijing

作　　者：郇宁[1,2] 曾立民[1] 邵敏[1] 崔良[3] 毛节泰[4] 周楠[1] 董华斌[1] 俞仲英[1] 罗志明[1] 

机构地区：[1]北京大学环境学院,环境模拟与污染控制国家重点实验室 [2]北京市环境保护监测中心,北京100044 [3]山东省即墨市环境保护局 [4]北京大学物理学院,暴雨与旱涝灾害教育部重点实验室

出　　处：《北京大学学报（自然科学版）》2006年第2期265-270,共6页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家863项目(2005AA649030);国家973项目(2002CB410801)资助

摘　　要：使用两台较先进的仪器,Aethalometer和Sunset碳分析仪(TOT),同时同地检测北京大气PM2.5的碳组分。实验发现两台仪器的监测结果有较好的线性相关性和一致性(R2=0.80);EC(Elemental Carbon)和OC(OrganicCarbon)有较好的线性相关性(R2=0.82);OC/EC的比值白天较夜间高、正常天气较逆温天气较高、逆温天气下白天与夜间差别不大,OC/EC平均值约4.76;并分析了用OC/EC的比值大于2判断是否存在二次污染的片面性。The carbon content in PM2.5 is measured by Aethalometer （for BC） and Sunset OC/EC analyzer （TOT, for EC）, respectively, during the winter of 2004 in Beijing. The experimental result shows that black carbon and elemental carbon have a good agreement with a high correlation coefficient （R^2 = 0.80）, so does organic carbon and elemental carbon （R^2 = 0.82）. The ratio of OC to EC is higher in the daytime than at night and higher at normal day than at temperature inversion day. In addition, there is no significant difference of OC to EC ratio between day and night at temperature inversion day. The average ratio of OC to EC is 4.76. It is also proved that ratio of OC to EC larger than 2 is not the exact index for secondary pollution.

关 键 词：有机碳 元素碳 碳黑 Sunset碳分析仪 黑度仪 

分 类 号：X831[环境科学与工程—环境工程]